RESPONSE OF GREEN STINKBUG Nezara viridula (LINNAEUS), TO THE ACTIVITY OF ENTOMOPATHOGENIC FUNGI Beauveria bassiana AND Metarhizium anisopliae
Maha
Nada
Plant Protection. Research Institute, Agriculture Research Center, Dokki, Giza, Egypt
author
text
article
2015
eng
Greenbug Nezara viridula L. have wide host range more than 30 families and feed on all parts of plant causing high economic damage. Also, it can transmit plant pathogens like bacteria and fungus. Laboratory bioassay of the two entomopathogenic fungi; Beauveria bassiana and Metarhizium anisopliae were tested against N. viridula adult and evaluated their effect of some biological aspects after 24 , 48 and 72 hours from treatment with 107 spores/ml. Result revealed that M. anisopliae treatment had higher activity than B. bassiana treatment. The LC50 values were 1.4x106 and 2.05x107 spores/ml, respectively and the LT50 values were 4.47 and 5.29 days, respectively. Results obtained showed that M. anisopliae caused decrease in each total protein, carbohydrates and lipids contained than B. bassiana . In case of M. anisopliae treatment the mean of total protein content was 19.67, 15.6 and 19.77 mg/g.b.wt after 24, 48 and 72 hours, respectively. However in case of B. bassiana mean of total protein , content recorded 20.83, 24.33 and 25.67 mg/g.b.wt after 24, 48 and 72 hours, respectively whereas the untreated check was 27.3 mg/g.b.wt. The mean of total carbohydrates was 16.63 for the check untreated and recorded 12.47, 10.9 and 12.5 mg/g.b.wt in case of M. anisopliae treatment while these values were 15.3, 16.27 and 16.27 mg/g.b.wt after 24, 48 and 72 hours, respectively in case of B. bassiana . Total lipids recorded highly reduction in case of M. anisopliae content which being were 5.3, 4.63 and 5.1 mg/g.b.wt after 24, 48 and 72 hours compared with 8.63 mg/g.b.wt of untreated. While total lipids showed slight significant decrease after 24 hour in case of B. bassiana treatment and no significance after 48 and 72 hours which recorded 6.73,7.93 and 8.7 mg/g.b.wt, respectively. M. anisopliae treatment caused higher reduction in trehalase activity of N. virdula adults after 24, 48 and 72 hours where the activity levels were 489.67, 390.67 and 161.33 ug glucose/min/g. b. wt, respectively than B. bassiana where the enzymatic activity recorded 273.67, 359 and 506.33 ug glucose/min/g. b. wt, respectively. On the other hand, treatment with M. anisopliae, induced higher reduction in invertase activity for N. virdula after 24, 48 and 72 hours where the enzymatic activity exhibited 401.33, 304 and 258.67 ug glucose/min/g. b. wt, respectively compared with B. bassiana ( 360, 383.67 and 412 ug glucose/min/g. b. wt, respectively). It could be concluded that M anisopliae showed more virulence and its effect on biochemical aspects under the study than that of B. bassiana.
Journal of Plant Protection and Pathology
Mansoura University, Faculty of Agriculture
2090-3677
6
v.
12
no.
2015
1633
1644
https://jppp.journals.ekb.eg/article_75779_ecad37c2e5634c72d3dc181c0bedb5dd.pdf
dx.doi.org/10.21608/jppp.2015.75779
ROLE OF ORB-WEB WEAVER SPIDERS IN CONTROLLING THE PESTS OF THE EARLY SUGAR BEET PLANTATION IN KAFR EL-SHEIKH REGION
Rania
Mashaal
Plant Protection Dept., Fac. Agric., Tanta Univ.
author
text
article
2015
eng
The current investigation was carried out during 2012/13 and 2013/14 sugar beet seasons at the Experimental Farm of Sakha Agricultural Research Station and laboratory of Plant Protection Department, Faculty of Agriculture, Tanta University for identifying the arthropods (insect pests and acari) trapped in spider webs. Most of trapped arthropods pests were collembolan (48.08%), followed by aphids (Aphis gossypii (Glover) and others) (25.64%). Moderate number of cicadellids (12.82%), Thrips tabaci Lind. (4.81%), Spodoptera littoralis (Boisd.) larvae (3.21%), Spodoptera exigua (Hubn.) larvae (2.88%) and Tetranychus sp. (2.56%). Also, eight spider species, belonging to five families were surveyed. The highest family was Araneidae which contained three species, Araneus sp., Argiope trifasciata Forscall and Singa sp. followed by Linyphiidae was represented by two species (Bathyphantes sp. and Erigone sp.). Each of Amaurobiidae (Amaurobius sp.), Dictynidae (Dictyna sp.) and Theridiidae (Theridion sp.) had one species only.
Finally, these results show the importance of spider webs in capturing sugar beet pests, consequently, play a major role in controlling pests without use of any pesticides.
Journal of Plant Protection and Pathology
Mansoura University, Faculty of Agriculture
2090-3677
6
v.
12
no.
2015
1645
1651
https://jppp.journals.ekb.eg/article_75780_b987ac6d890c0e04976b5eacf659cf6c.pdf
dx.doi.org/10.21608/jppp.2015.75780
SNAIL CONTROL WITH DIFFERENT AND UNSPECIFIC PESTICIDES
N.
Shaker
Department of Pesticides Chemistry and Technology, Faculty of Agriculture,Alexandria University, Egypt
author
M.
Badawy
Department of Pesticides Chemistry and Technology, Faculty of Agriculture,Alexandria University, Egypt
author
A.
Hussein
Department of Pesticides Chemistry and Technology, Faculty of Agriculture,Alexandria University, Egypt
author
text
article
2015
eng
Brown snails (Eobania vermiculata), one of the most abundant gastropod of Egyptian farms, which causes many damages for economic crops and ornamentals plants. Methomyl, pirimicarb, and oxamyl as a symbol of carbamates pesticides group, malathion as a symbol of organophosphates pesticides group, thiamethoxam, imidachloprid, and acetamiprid as a neonicotinoid pesticides group symbol, lambda-cyhalothrin as a pyrethroid pesticides group symbol, pymetrozine as a symbol of Antifeedant pesticides group, and the symbols of fungicide pesticides group were carbandazim, and copper sulfatewere used against snails, by baiting techniques. Bioassay results showed high activity of methomyl, oxamyl, acetamiprid and lambda-cyhalothrin against E. vermiculata., all over the different times of exposure, after 24 hrs the LC50 values were = 0.259, o.358, 1.049 and 5.976 % respectively, the LC50 values after 48 hrs were = 0.058, 0.90, 0.37 and 0.305 % respectively, the LC50 values after 72 hrs = 0.024, 0.023, 0.129 and 0.187 % respectively, and the LC50 values after 96 hrs = 0.024, 0.004, 0.039 and 0.047 % respectively. Biochemical studies of the four mentioned pesticides showed significantly inhibition effect for snail enzymes: acetylcholinestrase (AChE), carboxyl esterase (CaE), catalase, glutathione-s-transferase (GST) and polyphenoloxidase (PPO). So, these pesticides is promising as a new identification as molluscicides, available in the markets with suitable prices for users, instead of classical molluscicides, which became rarely in the markets and very expensive.
Journal of Plant Protection and Pathology
Mansoura University, Faculty of Agriculture
2090-3677
6
v.
12
no.
2015
1653
1661
https://jppp.journals.ekb.eg/article_75783_30768134ac2b08f0c8c95ea8b17b7493.pdf
dx.doi.org/10.21608/jppp.2015.75783
BIOLOGICAL ASPECTS AND THERMAL REQUIREMENTS OF THE BIRD CHERRY-OAT APHID, Rhopalosiphum padi (LINNAEUS), REARED ON WHEAT SEEDLINGS
Monira
El-Fatih
Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt.
author
Abeer
Mohammad
Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt.
author
A.
Shehawy
Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt.
author
text
article
2015
eng
The bird cherry-oat aphid, Rhopalosiphum padi (Linnaeus) was studied at 15, 20 and 25oC constant temperatures. Wheat seedlings were offered for feeding and maintaining the aphid, R. padi using the Punctured Ependorf Tube Technique. R. padi showed the longest life cycle duration at 15oC as 12.77±1.71days. This duration decreased to 8.36±0.79 and 6.74±0.56 at 20 and 25oC, respectively. The fecundity rate was the lowest (35.41 progenies/female) at 25oC. It was higher at both 15 and 20oC as 50.2 and 53.429 progenies/female, respectively. The longest life span was recorded at 15oC as 49.47±16.43days. This duration decreased to 34.05±6.22 and 19.47±4.16 days at 20oC and 25oC, respectively.
The lower developmental threshold (t0) for the R. padi nymphal instars; first, second, third and fourth were 2.216, 6.958, 3.432 and 0.164oC, respectively. The estimated t0 values for the life-cycle and generation time were 3.537 and 3.976oC, respectively. The thermal requirements (K) for each nymphal instar; first, second, third and fourth were, life-cycle and generation time were 45.97, 23.43, 30.97, 47.14, 142.56 and 154.15 dgree-days units, respectively.
Journal of Plant Protection and Pathology
Mansoura University, Faculty of Agriculture
2090-3677
6
v.
12
no.
2015
1663
1670
https://jppp.journals.ekb.eg/article_75784_02e589280b8b43eec0cc6b49375923fa.pdf
dx.doi.org/10.21608/jppp.2015.75784
COMPARATIVE MOLLUSCICIDAL ACTIVITY OF ABAMECTIN AND METHOMYL AGAINST Eobania vermiculata (Müller) AND Theba pisana (Müller
E.
Abdallah
Pesticide Chemistry and Toxicology, Faculty of Agriculture, El-Shatby, Alexandria University.
author
G.
Abdelgalil
Department of Agriculture Animal Pests, Plant Protection Research Institute, Agriculture Research Center.
author
F.
Kassem
Pesticide Chemistry and Toxicology, Faculty of Agriculture, El-Shatby, Alexandria University.
author
A.
Asran
Department of Agriculture Animal Pests, Plant Protection Research Institute, Agriculture Research Center.
author
H. S
abou-Elnasser
National Institute of Oceanography and fisheries (NIOF). The Central Laboratory
author
text
article
2015
eng
The molluscicidal activity of abamectin were assessed compared with methomyl against the most two abundant snail species brown garden snail (BGS) Eobania vermiculata and white garden snail (WGS) Theba pisana under laboratory conditions. The results indicated that LC50 values of methomyl were almost equal LC50 values of abamectin indicating more molluscicidal potency of abamectin and methomyl. Results also revealed a complete consistency of correlation between the LC50 values and exposed time intervals. The high molluscicidal activity of abamectin against E. vermiculata and T. pisana compared to methomyl using topical application technique could be used practically in the field of land snails control program and overcome some drawbacks of using bait forms in this respect. Comparing the LD50 values indicate the significant variation of the molluscicidal activity between the two applications methods used in addition to the variation between the two species of chosen snails, the brown garden snail E. vermiculata were resistant species than the white garden snail T. pisana.
The molluscicidal activity of abamectin were assessed compared with methomyl against the most two abundant snail species brown garden snail (BGS) Eobania vermiculata and white garden snail (WGS) Theba pisana under laboratory conditions. The results indicated that LC50 values of methomyl were almost equal LC50 values of abamectin indicating more molluscicidal potency of abamectin and methomyl. Results also revealed a complete consistency of correlation between the LC50 values and exposed time intervals. The high molluscicidal activity of abamectin against E. vermiculata and T. pisana compared to methomyl using topical application technique could be used practically in the field of land snails control program and overcome some drawbacks of using bait forms in this respect. Comparing the LD50 values indicate the significant variation of the molluscicidal activity between the two applications methods used in addition to the variation between the two species of chosen snails, the brown garden snail E. vermiculata were resistant species than the white garden snail T. pisana.
Keywords: Molluscicides, Abamectin, Methomyl, Eobania vermiculata and Theba pisana
Journal of Plant Protection and Pathology
Mansoura University, Faculty of Agriculture
2090-3677
6
v.
12
no.
2015
1671
1683
https://jppp.journals.ekb.eg/article_75786_4b102357273a651396e925add6e7f24d.pdf
dx.doi.org/10.21608/jppp.2015.75786
IDENTIFICATION, INSECTICIDAL EFFECT AND ANTIBIOSIS STUDIES OF SOME BACTERIA ISOLATED FROM NATURALLY INFECTED Pectinophora gossypiella (SAUND.) COLLECTED FROM COTTON FIELDS IN EGYPT.
N
Abou-zeid
Microorganisms unit, Plant Pathology Research Institute, Agriculture Research Centre Giza Egypt.
author
Kreema
El-Lebody
Bollworm Research Division, Plant Protection Institute, Agriculture Research Centre, Giza, Egypt.
author
Noher
Mahmoud
Microorganisms unit, Plant Pathology Research Institute, Agriculture Research Centre Giza Egypt.
author
Manal
ElSharkawy
Bollworm Research Division, Plant Protection Institute, Agriculture Research Centre, Giza, Egypt.
author
text
article
2015
eng
One of the important Integrated Pest Management Strategies (IPM) against economic pests in Egypt is the use of biological control methods.The use of entomo - pathogenic bacteria is one of these methods. The authors achieved four isolates of bacteria from the naturally infected P. gossypiella in cotton fields at Assuit and Kafr El–Sheikh Governorates, Egypt. Isolates were characterized based on morphological properties. Morphological analyses were carried out based on Bergey's Manual of Systematic Bacteriology. The identification of the isolated bacteria was confirmed by using Biolog-System as, Staphyloccus sciuri, Micrococcus luteus, Brevibacterium lines & Brevibacterium casei. In addition, their larvicidal effect was evaluated. The results revealed that, S. sciuri and M. luteus were the most effective against 1st instar larvae of PBW. Furthermore, their latent effect caused the lowest pupation % resulted from treated PBW larvae. S. sciuri was the most promising bacterial isolate to be developed as a biological control agent against P.gossypiella.
The antagonists of bacterial strain against the mycelial growth of the pathogenic fungi (Rhizoctonia solani, Fusarium solani and Macrophomia phaseolina), was experimently tested to evaluate growth reduction of all pathogenic fungi.
Journal of Plant Protection and Pathology
Mansoura University, Faculty of Agriculture
2090-3677
6
v.
12
no.
2015
1685
1696
https://jppp.journals.ekb.eg/article_75787_78ec5ae65ff67ae8e76f5b5ec5db451c.pdf
dx.doi.org/10.21608/jppp.2015.75787
PERSISTENCE OF POISON BAITS OF SOME PESTICIDES COMMONLY USED IN LAND SNAILS CONTORL
S.
Shetaia
Plant Protection Research Institute, Agric. Res. Center, Dokky, Giza, Egypt.
author
text
article
2015
eng
The efficacy of three known pesticides (methomyl 20% SL, methiocarb 2% GR and metaldehyde 5% GR) was evaluated as poison baits against adults of Monacha cartusiana under laboratory and filed conditions. The effect of time elapsed between preparation of poison baits and their offering to snails on the efficacy of these baits was also studied. Under laboratory conditions, results revealed that metaldehyde baits was the most effective while baits of methomyl were the lowest one and the poison baits of methiocarb occupied an intermediate position. Regarding the effect of time passing between preparation of baits and their use against snails, it was found that mortality percentages were decreased as the time passed. Results under filed conditions cleared that methomyl and metaldehyde were more degraded rapidly by time passing while methiocarb awas more stable.
Journal of Plant Protection and Pathology
Mansoura University, Faculty of Agriculture
2090-3677
6
v.
12
no.
2015
1697
1702
https://jppp.journals.ekb.eg/article_75789_c2c7a2a2d88e67fe4201516f80e2176e.pdf
dx.doi.org/10.21608/jppp.2015.75789
COTTON BOLLWORM Helicoverpa armigera: CONTROL BY BIORATIONAL INSECTICIDES
H.
El-Bassouiny
Agriculture Research center - Plant Protection Institute Al-Duqqi, Giza, Egypt.
author
Haity
Tadrose
Agriculture Research center - Plant Protection Institute Al-Duqqi, Giza, Egypt.
author
A.
El-Nagger
Agriculture Research center - Plant Protection Institute Al-Duqqi, Giza, Egypt.
author
text
article
2015
eng
The present work was devoted to study the impact of some recent insecticides pertaining to biorational insecticides group that have low mammalian toxicity i.e, [chlorantraniliprole, spinetoram, methoxyfenozide, thiamethoxam and lambda-cyhalothrin]which were sprayed individually and/or mixed with each other against the American bollworm (ABW) Helicoverpa armigera during the consequent growing cotton seasons of 2014 and 2015 at Al Zeiny - Abohoms, El-behaira Governorate, Egypt. Results of the study showed that the admixed different compounds [ Voliam Flexi® 40 WG (Chlorantraniliprol 10%+ Thiamethoxam 20 %), Engeo® %24.7 SC (Thiametoxam 14,1%+ Lambda-cyhalotrina 10,6%), Radiant® 12% SC (Spinosyn JL) and Runner® 24% SC (methoxyfenozide)] gave the highest efficient activity upon the population of H. armigera larvae. It could be also said that, the mixing of each of these different compounds together had a strong effect on the annihilation of the population of ABW H. armigera larvae more than their use individually.
Journal of Plant Protection and Pathology
Mansoura University, Faculty of Agriculture
2090-3677
6
v.
12
no.
2015
1703
1709
https://jppp.journals.ekb.eg/article_75791_c559ecfc2d13a6eadb4d58934a2dfac7.pdf
dx.doi.org/10.21608/jppp.2015.75791
ACTIVITY OF CASTOR OIL SEEDS Ricinus communis ETHANOL EXTRACT AGAINST COTTON LEAFWORM Spodoptera littoralis (BOISD.)
H.
Dahi
Plant Protection Research Institute, Dokki, Giza, Egypt
author
Walaa
Gamil
Plant Protection Research Institute, Dokki, Giza, Egypt
author
Mona
Yones
National Authority for Remote Sensing and Space Sciences (NARSS), Cairo, Egypt.
author
text
article
2015
eng
The present work aimed to study the effect of ethanol extract of Ricinus commnuis L. seeds on biological and physiological aspects for the cotton leafworm Spodoptera littoralis, 2nd and 4th instar larvae. The results cleared that the larval duration was 17.08 and 15.58 days & 10.11 and 9.36 days for treated and the untreated 2nd & 4th instar larvae respectively. The pupation percentage was 60.0 and 96.0 % for treated and untreated 2nd instar larvae and 61.0 and 93.0 for treated and untreated 4th instar larvae. The pupal weight was affected by the botanical extract. The pupal duration was 11.40 and 11.71 days for treated and untreated 2nd instar larvae and it was 11.96 and 12.51 days for treated and untreated 4th instar larvae. The emergence percentages resulted from treated 2nd and 4th instar larvae were 82.0 and 85.2 % compared with 97.0 % and 92.0 % for that resulted from the untreated larvae, respectively. On the other hand, the malformed adult was 28.0 and 2.0 % for 2nd instar larvae (treated and untreated) and 16.0 and 5.0 % for 4th instar larvae (treated and untreated) respectively. There are decreasing in fecundity of S. littoralis adults resulted from the treated 2nd and 4th instar larvae by the botanical extract used for this study. Effect of LC50 value of the tested plant extract on the biochemical aspects of the 4th larval instar of S. littoralis was detected. The biochemical aspects AST, ALT, alkaline and acid phosphatase activities, the as well as the total protein content post treatment of the 4th instar larvae were considered throughout the present study.
Journal of Plant Protection and Pathology
Mansoura University, Faculty of Agriculture
2090-3677
6
v.
12
no.
2015
1711
1725
https://jppp.journals.ekb.eg/article_75796_8af88e7b0b5393d32dd690093d0ecc92.pdf
dx.doi.org/10.21608/jppp.2015.75796
SURVEY AND POPULATION FLUCTUATIONS OF COMMON INSECT PESTS AND THEIR PREDATORS ON TWO MEDICINAL PLANT SPECIES AT FAYOUM GOVERNORATE, EGYPT.
R.
Solaiman
Department of plant protection, Faculty of Agriculture, Fayoum Univ., Egypt.
author
text
article
2015
eng
Thirteen species of insect pests belong to eight families and five orders were recorded on Calendula plants. Nesidocoris tenuis Reut. While twelve insect pests belong to nine Families under six orders were recorded On chamomile plants. The chrysanthemum fly, Trupanea stellata (F.) was the highest in population followed by Lygus gomellatus H. S. and Nysius graminicolus K.
Concerning the population fluctuations for the dominant insects pests, it found that N. tenuis had six peaks per season. The highest peaks were recordrd at the 2nd week of April and the end of March for 1st and 2nd seasons, respectively. For Empoasca decipiens Paoli, detected four peaks in the 1st season and five peaks in the 2nd season. The highest peaks were recorded individuals/50 double sweep net strokes in the 2nd week of April and in the 3rd week of March. for 1st and 2nd seasons respectively. On chamomile, Lygus gomellatus had 5 peaks in the 1st season and only four peaks in the 2nd season. N. graminicolus, showed six peaks in the 1st season and 5 peaks in the 2nd season. The highest peaks were at the 1st week of Dec. and the 2nd week of Dec. for 1st and 2nd seasons. Aphids had four peaks in both study seasons, the highest peaks found in the last week of March and 3rd week of Feb. for 1st and 2nd seasons , respectively. Also, population density of T. stellata recorded five peaks for each.
On the other hand, five species of predatory insects belong to four orders (Coleoptera, Hemiptera, Neuroptera and Diptera), were recorded in the first and 2nd seasons on chamomile and calendula plants, respectively. Population density of predators showed that, Orius spp. was the most dominant predator, while the dipterous predators showed the lowest population.
Journal of Plant Protection and Pathology
Mansoura University, Faculty of Agriculture
2090-3677
6
v.
12
no.
2015
1727
1738
https://jppp.journals.ekb.eg/article_75803_4a8c5656f6da98d918d34c54bcb2bbe1.pdf
dx.doi.org/10.21608/jppp.2015.75803
BIOLOGY OF THE COCCINELLID PREDATOR, Clitostethus acuatus (ROSSI), IN WINTER , AS REARED ON EGG OF THE WHITE FLY , Bemisia tabaci
Amany
Khalifa
plant protection Research Institute, Department of Biological control , Agricultural Research Center, Giza, Egypt.
author
M.
El-Husseini
Center of Biological control and IPM , Fac. of Agric, Cairo univ. Giza , Egypt
author
text
article
2015
eng
The predator, Clitostethus arcuatus (Rossi) is an efficient natural enemy against several homopterous insects. It overwinters under cold conditions as an adult .In this investigation , the diapausing predator turned into active by rearing under laboratory condations of 15-20 ْ C, and 59-80% R.H. At these conditions, incubation period lasted for 9.8 + 0.20 days, larval stage for 23.5 + 0.13 days, pupal stage for 8.3 + 0.05 days. Total development period took 40-49 days. Egg hatchability was quiet high ( 92 % ), and the sex ratio was 2 : 3 for the females and males, respectively. These results wuld be useful , if the mass-rearing of the predator was initated early in the season. Thus, the predator could be available as early as possible for biological control procedures .
Journal of Plant Protection and Pathology
Mansoura University, Faculty of Agriculture
2090-3677
6
v.
12
no.
2015
1739
1743
https://jppp.journals.ekb.eg/article_75805_886c8dcd92caec6da066d46325393a9a.pdf
dx.doi.org/10.21608/jppp.2015.75805
RESISTANCE TO FUSARIUM WILT DISEASE IN SOME EXPERIMENTAL GENOTYPES AND COMMERCIAL CULTIVARS OF COTTON
Amal
Asran
Plant Pathol. Res. Instit., Agric. Res. Center, Giza, Egypt.
author
MT.
Mansour
Plant Pathol. Res. Instit., Agric. Res. Center, Giza, Egypt.
author
S.
Zayed
Plant Pathol. Res. Instit., Agric. Res. Center, Giza, Egypt.
author
A.
Ashour
Plant Pathol. Res. Instit., Agric. Res. Center, Giza, Egypt.
author
Marian
Habeb
Plant Pathol. Res. Instit., Agric. Res. Center, Giza, Egypt.
author
A.
Aly
Plant Pathol. Res. Instit., Agric. Res. Center, Giza, Egypt.
author
text
article
2015
eng
This study aimed to evaluate some cotton germplasm as a part of the Screening Program of Fusarium Wilt Resistance. This program has been conducted annually in the greenhouses of Cotton and Fiber Crops Diseases Research Section, Plant Pathology Research Institute. The present study included 200 families of ten experimental genotypes and 933 families of seven commercial cultivars. Healthy survival rate of families was used as a criterion to evaluate the reactions of the tested germplasm to Fusarium wilt. The experimental genotypes showed a very narrow range of reactions to Fusarium wilt with healthy survival rate of families this narrow range, ranging from 94.73 to 99.48%. Thus, all the tested genotypes were classified as very highly resistant (VHR).However, within significant differences were observed among some of the tested genotypes. Most of the families of the tested commercial cultivars were also classified as VHR.The percentages of families in this reaction class ranged from 57.82 (families of Giza 87) to 100% ( families of Giza 88).The commercial cultivars were classified into three distinct groups based on the dissimilarity distances(DDs)generated from cluster analysis of the profiles of their reaction classes. Within each group, the cultivars were almost identical in the patterns of their reaction classes.
Journal of Plant Protection and Pathology
Mansoura University, Faculty of Agriculture
2090-3677
6
v.
12
no.
2015
1745
1752
https://jppp.journals.ekb.eg/article_75809_96865d6b2bc6da5b5c08190399ea2244.pdf
dx.doi.org/10.21608/jppp.2015.75809
CONTROL OF THRIPS TABACI (LINDMAN) (HOMOPTERA: THRIPDIDAE) UNDER FIVE DIFFERENT LEVELS OF FERTILIZER ON GLADIOLUS SP.(IRIDACEAE)
W.
Azer
Institute of African Research and Studies, Cairo Univ.
author
H.
Sobhey
Institute of African Research and Studies, Cairo Univ.
author
A.
Mansour
Plant protection Research Institute, A.R.C.Dokki,Giza.
author
Enas
Abdelatif
Plant protection Research Institute, A.R.C.Dokki,Giza.
author
text
article
2015
eng
The present investigation was carried out at the ornamental flower farm in Abu Galeb village, Giza governorate throughout two successive seasons (2013 and 2014).The experiment studied the effect of four different pesticides (Ashok, Bovaria, Mlathion and Actara) under five different fertilizer levels on the population density of the onion thrips Thrips tabaci (lind.) infested Gladiolus sp.(Iridaceae). Obtained results during two seasons indicated that, the most efficient control agents after general mean of 14 days of spraying was Ashok for non fertilizer (0,0,0) the reduction percentages was %68 of T. tabaci on 2013 season and % 76 on 2014 season, respectively. on the other hand, the least potent was Mlathion for non fertilizer (0,0,0) the reduction percentages was 48% of T.tabaci on 2013 season and % 43 on 2014 season, respectively. After general mean of 14 days of spraying.
Journal of Plant Protection and Pathology
Mansoura University, Faculty of Agriculture
2090-3677
6
v.
12
no.
2015
1753
1760
https://jppp.journals.ekb.eg/article_75812_137896462240dba2d76251657d9cc9d7.pdf
dx.doi.org/10.21608/jppp.2015.75812