ORIGINAL_ARTICLE
POPULATION DENSITY OF CERTAIN PIERCING SUCKING PESTS ON THREE SOYBEAN VARIETIES IN RELATION TO SOME LEAF CHARACTERISTIC
The population density of the white fly, Bemisia tabaci (Genn.), the cotton aphid, Aphis gossypii Glov., jassids, Empoasca spp. and the spider mite, Tetranychus urticae Koch. were evaluated on three soybean varieties (Giza 35, Giza 82 and Clark) at Sakha Agricultural Research Station Farm, Kafr El-Sheikh during two successive seasons; 2008 and 2009 as well as its relation to hair numbers on leaf and chlorophyll content.
The obtained results indicated that B. tabaci started to appear with higher numbers than the other pests during the two study seasons and its population was the highest ,while T. urticae. was the least. B. tabaci recorded two peaks of abundance in every season ( on 28th June and 23rd August, respectively). Both Empoasca spp. and T. urticae recorded its maximum on 26th July in the two seasons. One peak of abundance for A. gossypii occurred in the first season (26th July) and two peaks in the second season (12th July and 23rd August).
The statistical analysis indicated insignificant differences in chlorophyll content of leaf between the three varieties in spite of the differences in the population of the considered pests, while the hair density on leaf significantly affected the pest population. Giza 35 which possessed the highest number of hairs on leaf, harbored the highest population of B. tabaci and T. urticae and the lowest population of A. gossypii. The highest number of A. gossypii occurred on Clark variety which had the low number of hairs on leaf. Giza 82 was the least infested with A. gossypii and T. urticae and had a moderate number of hairs on leaf. The three tested varieties did not appear a significant differences to infestation with Empoasca spp. Thus, the varieties that had a low number of hairs on leaves should be used as a safe and easy tool in the integrated pest management program to reduce the infestation with the harmful pests of soybean.
https://jppp.journals.ekb.eg/article_86935_3bd6d41e0a2fdb92a45178fcc038e954.pdf
2010-10-01
767
773
10.21608/jppp.2010.86935
M.
El-Samahy
melsamahy75@yahoo.com
1
Plant Protection Res. Inst., Agric. Res. Center, Sakha, Dokki, Egypt.
AUTHOR
I.
Saad
2
Plant Protection Res. Inst., Agric. Res. Center, Sakha, Dokki, Egypt.
AUTHOR
ORIGINAL_ARTICLE
MANGO POWDERY MILDEW Oidium mangiferae AN ALTERNATIVE FOOD FOR THE PREDATORY MITES Typhlodromus mangiferus AND Typhlodromips swirskii (PHYTOSEIIDAE) IN ABSENCE OR PRESENCE INCREASING PREY DENSITY OF Oligonichus mangiferus (TETRANYCHIDAE) IN EGYPT
The predacious mites, Typhlodromus mangiferus Zaber and EI- Borolossy and Typhlodromips swirskii (Athias-Henriot), reproduced successfully on mango powdery mildew Oidium mangiferae Berthet in absence or presence of spider mite prey O. mangiferus (Rahman and Sapra) under laboratory conditions of 25±1°C and 60-65% R.H. Adult female of both predators consumed protonymphs of O. mangiferus at different experimental densities. The consumption rate increased with increasing prey densities up to 25 protonymphs/female/day and decreased significantly at 35 and 50 protonymphs/female/day for the two predatory mites. Addition of powdery mildew conidia to each prey density significantly reduced consumption of spider mites at 35 and 50 protonymphs/female/day. Mean eggs/female/day by T. swirskii and T. mangiferus was 0.30.and 0.72 when reared on powdery mildew conidia compared with 1.64 and 1.57 when fed on powdery mildew and tetranychid prey, respectively. This increase in reproduction would have compensated the reduction in protonymph prey consumption due to the presence of mildew conidia. Mite-mildew interactions are discussed.
https://jppp.journals.ekb.eg/article_86937_d71225c41ee829feef61a557cbe048e4.pdf
2010-10-01
775
783
10.21608/jppp.2010.86937
A.
Badawi
1
Plant Protection Dept., National Research Centre, Dokki, Cairo, Egypt.
AUTHOR
Sahar
Afia
2
Plant Protection Dept., National Research Centre, Dokki, Cairo, Egypt.
AUTHOR
M.
Al-Azzazy
3
Department of Agricultural Zoology and Nematology, Faculty of Agriculture, AI-Azhar University, Cairo, Egypt
AUTHOR
ORIGINAL_ARTICLE
EFFECT OF TEMPERATURE AND RELATIVE HUMIDITY ON THE RATE OF DEVELOPMENT, FECUNDITY AND LIFE TABLE PARAMETERS OF THE RED SPIDER MITE Oligonychus mangiferus (RAHMAN AND, SAPRA) (ACARI: TETRANYCHIDAE)
Studies on biology of Oligonychus mangiferus (Rahman and Sapra) at combination of eight constant temperatures and relative humidities (RHs) viz., 7.0°C with 85% RH, I0°C with 80% RH, 15.0°C with 75% RH, 23.0°C with 70% RH, 31.0°C with 65% RH, 34.0°C with 65% RH, 36.0°C with 60% RH and 40.0°C with 55% RH revealed that the optimal condition for the development of these mites are 15.0-31.0°C and 65-75% RH. The highest temperature and the lowest RH accelerated the rate of development and induced more reproduction of O. mangiferus. Its population also multiplied 30.81 times in a generation time of 27.36 days at 31.0°C and 65% RH, while the same population only increased 7.46 times in a generation time of 48.07 days at 15.0°C and 75% RH. Fecundity was highest at 31.0°C and 65% RH with 46.43 eggs per female. The highest intrinsic rate of natural increase was observed at 31.0°C as 0.125 per day.
https://jppp.journals.ekb.eg/article_86938_dfbe2a0c3a5521a9daceaba9ce0c9646.pdf
2010-10-01
785
790
10.21608/jppp.2010.86938
B.
Abou-Awad
1
Plant Protection Dept., National Res. Centre, 12622 Dokki, Cairo, Egypt.
AUTHOR
M.
Al-Azzazy
2
Dept. Agric. Zoology and Nematology, Fac. Agric., AI-Azhar Univ. Cairo, Egypt
AUTHOR
Sahar
Afia
3
Plant Protection Dept., National Res. Centre, 12622 Dokki, Cairo, Egypt.
AUTHOR
ORIGINAL_ARTICLE
FORAGING BEHAVIOR OF TWO APHID PARASITOIDS; Aphidius matricariae HALIDAY AND Aphidius colemani VIERECK (HYMENOPTERA: APHIDIIDAE)
The effect of learning and experience status on the foraging behavior of aphid parasitoids Aphidius matricariae (Haliday) and A. colemani (Viereck) was studied. Direct observation showed that the experienced females remained for longer times on the leaves of potted cucumber plants (Cucumis sativus) than did their naïve counterparts. Also experienced female parasitoids attacked more aphids within a patch than did naïve females and parasitized more hosts. Moreover, experienced females super-parasitized more aphids than did naïve ones for both parasitoid species. Almost no difference was found between the foraging behavior of A. matricariae and A. colemani.
https://jppp.journals.ekb.eg/article_86939_8e0934116c4f0349d980b78a9c19b055.pdf
2010-10-01
791
797
10.21608/jppp.2010.86939
Kh.
Al-Khawass
1
Plant Protection Dept., Fac. of Agric., Al-Azhar University, Cairo, Egypt
LEAD_AUTHOR
ORIGINAL_ARTICLE
EFFECT OF NEEM EXTRACT, NEEMAZAL T.S. ON TWO LAND SNAIL SPECIES UNDER LABORATORY CONDITIONS.
The effect of neem extract (Neemazal T.S.) on the eggs hatchability and adult snails of two land snail species, Monacha cartusiana and Eobania vermiculata as well as its effect on food consumption of Juvenile snails M. cartusiana under laboratory conditions was also evaluated. Results revealed that the hatchability of the two tested snail eggs decreased to reach 50, 42.5% on the highest concentration (400 ppm.), respectively. Regarding the effect of neem extract (Neemazal T.S.) against adult snail Monacha cartusiana mortality percentages reached to 20, 40, 55% in the end of experiment for the three tested concentration 0.625, 1.250 and 2.5%, respectively. Neemazal T.S. exhibited antifeeding effect on the juvenile snails of M. cartusiana. Food consumption reached to 9.6 mg. (after 3 days) for the highest concentration (200 ppm.) compared with 31.9 mg. for untreated juveniles.
https://jppp.journals.ekb.eg/article_86941_5252272f5130e9a983d351fdf4eaf30e.pdf
2010-10-01
799
806
10.21608/jppp.2010.86941
Sh.
Ismail
1
Plant Protection Res. Inst. Agric. Res. Center, Dokki, Giza, Egypt
AUTHOR
S.
Shetaia
2
Plant Protection Res. Inst. Agric. Res. Center, Dokki, Giza, Egypt
AUTHOR
Samah
Abdel Kader
3
Plant Protection Res. Inst. Agric. Res. Center, Dokki, Giza, Egypt
AUTHOR
ORIGINAL_ARTICLE
SUGAR BEET PLANT STAND IN AUGUST CULTIVATION AS INFLUENCED BY COTTON LEAFWORM INFESTATION AND ROLE OF ARTHROPOD PREDATORS IN INSECT MANAGEMENT
Field experiments were conducted at sugar beet fields at four districts (Kafr El-Sheikh, Qualleen, El-Riad and El-Hamoul) of Kafr El-Sheikh Governorate during three successive seasons, 2007/08, 2008/09 and 2009/10 seasons. The experiments aimed to monitor population fluctuations of cotton leafworm larvae on sugar beet planted on August 1st as first cultivation. The reductions in plant stand due to Spodoptera littoralis Boisd attacks were computed, and the correlations between this insect pest and each of predators and some weather factors were calculated. The highest population density of S. littoralis larvae was found during September and October with densities of 81.00 – 113.25, 95.00 – 126.25 and 119.25 – 18350 larvae/10 sugar beet plants in 2007/08, 2008/09 and 2009/10 sugar beet seasons, respectively. The high infestation by cotton leafworm synchronized with high temperature prevailing in September and October as compared with those prevailing in November and December. The coccinellid, true spiders and Chrysoperla carnea Steph. populations were high during September. The plant stand was heavily reduced due to S. littoralis attacks with values ranging between 93.67 and 94.52% at the four districts. Correlation coefficient values were highly significant between S. littoralis larval population and each of coccinellid and C. carnea populations.
https://jppp.journals.ekb.eg/article_86942_65a043e43d4139667512706e68d8dbd2.pdf
2010-10-01
807
813
10.21608/jppp.2010.86942
G.
Shalaby
1
Sugar Crop Research Institute, Agricultural Research Center, Dokki, Egypt.
AUTHOR
M.
El-Samahy
melsamahy75@yahoo.com
2
Plant Protection Research Institute, Agricultural Research Center, Dokki, Egypt.
AUTHOR
ORIGINAL_ARTICLE
STUDIES ON SOME PHYSICAL AND CHEMICAL PROPERTIES OF CLOVER HONEYS IN EGYPT
This studies aimed to determi.ne physical and chemical properties of clover honeys in Egypt. Eleven clover honeys samples from different governments in Egypt were analyzed results are presented from specific gravity, viscosity (Poise)color, granulation , EC (ppm),TSS % , moisture % ,pH ,free acidity mq/kg, lacton mq/kg, total acidity mq/kg ,fructose %, glucose %, sucrose % and maltose % .
The results indicated that specific gravity was parallel and ranged from 1.4548 to 1.4050 with mean 1.4100, viscosity from 34.9 to 93.05 with mean 46.93(Poise), color from 0.14 to 0.36 with mean 0.23 ,granulation from 1.760 to 1.437 with mean 1.630, EC from 247.5 to 100.0 ppm with mean 155.5,TSS from 80.38 to 82.75 with mean 81.0 % .
Chemical properties showed that moisture was parallel and ranged from 19.25 to 17.5 with mean 18.76, pH ranged from 3.70 to 4.15 with mean 3.8 ,Free acidity 76.5 to 18.5 with mean 35.31 mq/kg , Lacton 5.0 to 45.0 with mean 11.5 mq/kg ,total acidity from 81.0 to 25.5 with mean 43.75mq/kg, fructose from 40.43 to 37.57 % with mean 39.03, glucose 33.0 to 30.2 with mean 31.5% , sucrose 1.2 to 6.03 % with mean 3.56, maltose 8.0 to 3.5 with mean 5.2% and proline ranged form 51.35 to 23.55 mg/kg with mean 34.07 mg/kg.
It is clear that the biochemical variation can be useful separating at least some different honeys within different types
https://jppp.journals.ekb.eg/article_86945_ebb511ba9fd652707c37569c9627e5e1.pdf
2010-10-01
815
823
10.21608/jppp.2010.86945
I.
Essa
1
Faculty of Agric., El-Azhar, Univ., Egypt.
AUTHOR
A.
El-Saeady
2
Faculty of Agric., El-Azhar, Univ., Egypt.
AUTHOR
I.
Shehat
3
Faculty of Agric., El-Azhar, Univ., Egypt.
AUTHOR
A.
Metwaly
4
Plant Protection Research Institute, ARC, Dokki, Giza.
AUTHOR
ORIGINAL_ARTICLE
SEASONAL ABUNDANCE OF WHITEFLY Bimisia tababci (Gennadius) ON COTTON IN RELATION TO THE ASSOCIATED PREDATORS AND SOME WEATHER FACTORS AT KAFR EL-SHEIKH GOVERNORATE
Field experiments were conducted at farm of Sakha Agricultural Research Station, Kafr El-Sheikh Governorate during 2005, 2006 and 2007 cotton growing seasons to study the population abundance of Bimisia tabaci(Genn.) on cotton in relation to common associated predators (Coccinella spp., Scymnus spp., Chrysoperla carnea, Syrphus corellae, Orius spp. and true spiders) and some prevailing weather factors (temperature, relative humidity and wind speed).
Concerning the associated predators, their total population fluctuated and recorded three peaks of abundance during, August and September (2005 season) and four peaks during 2006 and 2007 seasons.
The combined effect of weekly mean of total predators, daily mean temperature, relative humidity and wind speed was responsible for 81.44, 82.19 and 95.42% of change in the population of whitefly B. tabaci in 2005, 2006 and 2007 cotton growing seasons, respectively.
Results obtained could be summarized in the following points:
- Four peaks of abundance were observed for B. tabaci (Genn.) during the period of study from May to September for each season.
- Maximum number of B. tabaci took place during July and August for three tested seasons with a mean of 628, 890 and 4188 individual/50 cotton leaves and 3954, 3920 individual/50 cotton leaves (2007 season), respectively.
https://jppp.journals.ekb.eg/article_86946_b3fb598ba681131c28ad4118d04a2762.pdf
2010-10-01
825
835
10.21608/jppp.2010.86946
S.
El-Awady
1
Plant Protection Dept., Fac. Agric., Azhar Univ.
AUTHOR
A.
El-Khouly
2
Plant Protection Dept., Fac. Agric., Azhar Univ.
AUTHOR
S.
Aref
3
Plant Protection Inst., Sakha Agric. Res. St., ARC, Egypt
AUTHOR
H.
Darweesh
4
Plant Protection Inst., Sakha Agric. Res. St., ARC, Egypt
AUTHOR
ORIGINAL_ARTICLE
BIOLOGICAL ACTIVITY AND ENHANCEMENT OF SILK YIELD PRODUCED BY Bombyx mori L. LARVAE FED ON MULBERRY LEAVES FORTIFIED WITH ROYAL JELLY
Nutritional values of mulberry leaves greatly affected growth and development of the commercial silk worm, Bombyx mori L. larvae and in turn silk production. Therefore, larvae of the last two instars were fed on treated leaves by dipping them in royal jelly solution at the rate of 5 g in 200 ml distilled water before offering them to larvae as food. This treatment increased the weights of the fourth and fifth instar larvae, weights of fresh cocoons, pupae, cocoon shell and reeled silk filament. The weights of ingested and digested treated mulberry leaves as well as approximate digestibility and efficiency of conversion of ingested and digested food to body substances in the fourth and fifth instar larvae were also increased as compared with those of larvae fed on untreated mulberry leaves. Feeding the last two instar larvae on treated leaves elicits favourable response in improving the commercial quantities of silk fibre and can be used in Sericulture for yield enhancement.
https://jppp.journals.ekb.eg/article_86948_47465dbf9dc8d702625fdaa5f6e060f8.pdf
2010-10-01
837
844
10.21608/jppp.2010.86948
Feeding Efficiency
silk production
Mulberry Silk
Worm
Royal Jelly Treatment
biological aspects
H.
Gomaa
1
Plant Protection Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
LEAD_AUTHOR