Mansoura University, Faculty of Agriculture
Journal of Plant Protection and Pathology
2090-3677
2090-3758
4
10
2013
10
01
ECOLOGICAL STUDIES ON SOME MEALYBUG SPECIES INFESTING GRAPEVINE TREES AND THEIR ASSOCIATED PREDATORY INSECTS AT MANSOURA DISTRICT.
821
836
EN
Nadia
E.
Mohamed
Plant protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt.
10.21608/jppp.2013.87495
The present investigation was carried out in farm of the AgricultureResearchCenter belonging to Faculty of Agriculture Mansoura University to study the population density of the common mealybug species attacking grapevine trees and their associatrd predators at Mansoura district, also to evaluate the effect of certain weather factors on these insects. The obtained results showed that four mealybug species belong to order: Homoptera were recorded. These species namely, <em>Icerya seychellarum</em> (Westwood); <em>Planococcus vitis</em> (Risso); <em>Pseudococcus longispinus</em>(targion,tozzetti) and <em>Maconellicoccus hirsutus</em> Green. The results cleared that the dominant species was <em>I</em>. <em>seychellarum</em> during the two years of study as it formed 47.85% in 2009 and 39.63 % in 2010 of the total number of these insects respectively. Five predatory insects belong to three orders Coleoptera, Neuroptera and Hemiptera with a total number of 701 individuals in 2009 and 853 individuals in 2010 were recorded. Order Coleoptera was the most dominant order in the two years of study as it formed 56.78% of the total insect numbers in 2009 and 60.5% in 2010. The results revealed that five peaks for <em>P. vitis</em> were found during the two years of investigation the highest average numbers for <em>P. vitis</em> was recorded in the second week of October in the first year and in the last week of November in the second year of study There were four peaks for <em>P. longispinus</em> were recorded during the two years of study. The highest average numbers for <em>P. longispinus</em>was found in the last week of October in the first year while that was in the second week of October in the second year of investigation. The obtained results revealed that there were three peaks for <em>I. seychelarum</em> during the two years of study, the highest average numbers for <em>I. seychellarum</em> was recorded in last week of October in the first year, while that was in the second week of November, in the second year of study, respectively. The results showed that there were two peaks for <em>M. hirsutus</em> during the two years of study. The highest average numbers for <em>M. hirsutus</em> in the third week of September in the first year and in the end of August in the second year of study respectively. The obtained results assured that the maximum, minimum and average temperature affected greatly on the population density of <em>P.</em> <em>vitis</em>; <em>I.</em><em> seychelarum</em>; <em>P.</em> <em>longispinus</em> and <em>M. hirsutus</em> during the two years of study and the maximum, minimum, average of relative humidity affected positively or negatively on the population density of these insects. The statistical correlation coefficient between the population density of <em>Rodolia cardinalis</em> (Mulsant); <em>Nephus includencs</em> Kirsh; <em>Exocomus flavipes </em>(Thnb.); <em>Chrysoperla carnea</em> (Steph.) and <em>Orius</em> <em>albidipennis </em>Reut and temperature and relative humidity showed a highly or slightly significant positively or negatively effect on population density of these insect during the two years of investigation.
Survey Icyrea seychelarum (Westwood),Planococcus vitis (Risso),Pseudococcus longispinus,Maconellicoccus hirsutus Green. Nautral enemies Rodolia cardinalis (Mulsant),Nephus includencs Kirsh,Exochomus flavipes (Thnb.),Chrysoperla carnea (Steph.) and Orius albidipennis Reut
https://jppp.journals.ekb.eg/article_87495.html
https://jppp.journals.ekb.eg/article_87495_4a4acf72e84f45a1ea124e9efdbd03fc.pdf
Mansoura University, Faculty of Agriculture
Journal of Plant Protection and Pathology
2090-3677
2090-3758
4
10
2013
10
01
BIOCHEMICAL EFFECTS OF SOME INSECT GROWTH REGULATORS ON FIELD STRAINS OF THE COTTON LEAFWORM, Spodoptera littoralis
837
844
EN
Seham
M.
Ismail
Central Laboratory of Pesticides. Sabahia. Alexandria. A.R.C.
10.21608/jppp.2013.87496
Different strains of cotton leafworm, <em>Spodoptera littoralis </em>larvae were collected from heavily sprayed fields or recently cultivated fields in different areas in Alexandria, and El-Boheira, proviance governorate. Chitinase activity was determined in laboratory susceptible strain of cotton leafworm and compared with enzyme activity for other collected strains which cleared that highest level of chitinase activity was found in Alexandria strains. The sensitivity of chitinase activity to chlorfluazuron and teflubenzuron was measured by I<sub>50</sub> values, values of I<sub>50</sub> in the case of chlorfluazuron were 0.23, 0.34, 0.41, 0.60, and 0.69 µM for lab strain; Borg El-Arab; West of Nobaria; Abou El-Matamir, and Edko strains of <em>Spodoptera</em> 2<sup>nd</sup> larvae respectively, while I<sub>50</sub> values were 0.31, 0.40, 0.46, 0.66, and 0.74 µM for lab strain and four field strains of <em>Spodoptera</em> 4<sup>th</sup> larvae respectively, similarly, the teflubenzuron were 0.40, 0.50, 0.57, 0.74, and 0.82 µM for lab strain and four field strains of <em>Spodoptera</em> 2<sup>nd</sup> larvae respectively, the I<sub>50</sub> values were 0.47, 0.59, 0.65, 0.88, and 0.93 µM for lab strain and four field strains of <em>Spodoptera</em> 4<sup>th</sup> larvae respectively. Also, the inhibition constant (K<sub>i</sub>) values were determined, the obtained data proved that compounds competitive inhibition of chitinase activity. The significant high mortality percentages were observed at all tested concentrations with chlorfluazuron than teflubenzuron and the result clearly showed that the 2<sup>nd</sup> instar larvae were more sensitive to the compounds tested, compared to those of the 4<sup>th</sup> instar, so when IGRs used for <em>S. littoralis</em> larvae control, dosage and timing of application should be carefully considered. The results of the present study may add some forward steps to use IGRs as alternative to conventional insecticides especially against this insect, so, the IGRs can be involved in important steps necessary for successful IPM programs applied against <em>S. littoralis.</em>
https://jppp.journals.ekb.eg/article_87496.html
https://jppp.journals.ekb.eg/article_87496_feb939710f6fb41e027565f907400c91.pdf
Mansoura University, Faculty of Agriculture
Journal of Plant Protection and Pathology
2090-3677
2090-3758
4
10
2013
10
01
EFFECT 0F CONSTANT TEMPERATURE DEGREES ON CERTAIN BIOLOGICAL CHARACTERSTICS OF THE COCCINELLID PREDATOR Rodolia cardinalis (MULSANT) (COLEOPTERA: COCCINELLIDAE)
845
855
EN
Nadia
E.
Mohamed
Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt.
10.21608/jppp.2013.87498
Laboratory experiments were carried out in the Insectary of Economic Entomology Department Faculty, of Agriculture, Mansoura University, from the beginning of October 2011 tell the end of September 2012 under three constant temperature degrees (15±1, 25±1 and 30±1 C<sup>o</sup>) to study the influence of three constant temperature degrees on biological characteristics for the coccinellid predator <em>Rodolia cardinalis</em> (Mulsant) when reared on the third nymphal instars of <em>Icerya purchasi</em> Mask. The obtained results revealed that, the average of the total consumption per larva was 55.96 ± 1.3 individuals, the duration period of the larval stage averaged 30.1±0.56 days. The percentages of the mortality were 20.5, 13.9, 6.9 and 5.6 % during the four larval instars respectively when this predator reared on <em>I.</em><em> purchasi</em> under constant temperature of 15±1 C<sup>o</sup> and 70±5 %. The predator female fed on a total average of 389.28±5.7 individuals, during the longevity period of 66.07±3.7 days. The number of deposited eggs per predator female was averaged 156±3.9 eggs. The predator male consumed a total average of 210.75±3.42 individuals. Meanwhile the data showed that, the average of the total consumption per larva was 107.53±6.2 individuals, when this predator reared on <em>I.</em><em> purchasi</em> nymphs under constant temperature of 25±1 C<sup>o</sup> and 70±5 %, the duration period of the larval stage averaged 14.37±1.6 days. The percentages of the mortality were 13.4, 9.1, 4.5 and 3.7 % % during the four larval instars respectively. The predator female fed on a total average of 348.82 ± 8.56 individuals, during the longevity period of 42.5±2.1days. The number of deposited eggs per predator female was averaged 455.79±10.17 eggs. The predator male consumed a total average of 201.74 ± 5.96 individuals. The obtained results revealed that, the average of the total consumption per larva was 87.16±4.6 individuals, the duration period of the larval stage averaged 9.24±1.95 days. The percentages of the mortality were 14.2, 10.4, 5.7 and 4.5 % during the four larval instars respectively when this predator reared on <em>I.</em><em> purchasi</em> under constant temperature of 30±1 C<sup>o</sup> and 70±5 %. The predator female fed on a total average of 248.30±7.96 individuals, during the longevity period of 32.15±1.92 days. The number of deposited eggs per predator female was averaged 310.75±8.56 eggs. The predator male consumed a total average of 176.35±5.46 individuals. Statistical analysis showed significant differences between the duration periods as well as the average of total consumption per larvae for the larval stage under the three constant temperature degrees. Meanwhile the statistical analysis cleared significant differences between the longevity period for female and male as well as the average of total consumption and the number of deposited eggs per female and the three constant temperature degrees. In conclusion the optimum temperature for mass rearing of this predator was 25±1 C<sup>o</sup> because the number of deposited eggs per female the feeding capacity was the highest in comparison with the other temperature degrees.
Rodolia cardinalis (Mulsant),Icerya purchasi Mask,constant temperature,biology
https://jppp.journals.ekb.eg/article_87498.html
https://jppp.journals.ekb.eg/article_87498_c8e194530dbee42165968500f2bc2a94.pdf
Mansoura University, Faculty of Agriculture
Journal of Plant Protection and Pathology
2090-3677
2090-3758
4
10
2013
10
01
COMPARISON STUDIES BETWEEN THE HYBRID RACES OF CARNIOLEAN AND ITALIAN HONEYBEE TO RESISTANCE OF THE FOULBROODS
857
867
EN
R.
E.
Omer
Plant Protec. Dept., Fac. of Agric., Moshtohor, Benha Univ., Egypt.
M.
E.
Hashish
Beekeeping Res. Dept., Plants Protec. Res. Inst., Agric. Res. Cent., Giza.
mhas214263@yahoo.com
A.
M.
Khattaby
Beekeeping Res. Dept., Plants Protec. Res. Inst., Agric. Res. Cent., Giza.
M.
M.
Khattab
Plant Protec. Dept., Fac. of Agric., Moshtohor, Benha Univ., Egypt.
I.
A.
Gaaboub
Plant Protec. Dept., Fac. of Agric., Moshtohor, Benha Univ., Egypt.
10.21608/jppp.2013.87501
This work was performed during the period from May 2011 to May 2012, the times of increase and decrease of the infection strength with American and European foulbrood diseases in certain hybrid honeybee colonies <em>Apis mellifera </em>(L<strong>.)</strong> (Hymenoptera<strong>: </strong>Apidae) were studied at Menoufia governorate, generally, it was appeared that American foulbrood (AFB) existing throughout the year by varied levels while European foulbrood (EFB) is viewed at short and defined periods, other hand, the hybrid Carniolean honeybee race was found more tolerance to infection with the foulbrood diseases than the hybrid Italian honeybee race in the Egyptian environment
Honeybee,Apis mellifera L,American foulbrood,European foulbrood,Infection,Sheshae,Shatanof,hybrid Carniolean race,hybrid Italian race,Fluctuation,Prospective
https://jppp.journals.ekb.eg/article_87501.html
https://jppp.journals.ekb.eg/article_87501_f843e93f2476bf1280e33fa5334df8bd.pdf
Mansoura University, Faculty of Agriculture
Journal of Plant Protection and Pathology
2090-3677
2090-3758
4
10
2013
10
01
تقييم قابلية بعض أصناف الخيارCucumis sativus L. والبطيخ الأحمر lanatus Nakai Citrullus للاصابة بنيماتودا تعقد الجذور Meloidogyne incognita
869
874
EN
عبد العزيز
صيادي
قسم وقاية النبات- کلية الزراعة – جامعة دمشق - سورية
مريم
العبد
القادر
قسم وقاية النبات- کلية الزراعة – جامعة دمشق - سورية
خالد
العسس
قسم وقاية النبات- کلية الزراعة – جامعة دمشق - سورية
10.21608/jppp.2013.87502
اجريت الدراسة تحت ظروف الحقل خلال الموسم 2013 بمحافظة حماة فى سورية لاختبار قابلية ثلاثة أصناف من الخيار الهجين: مکسيموس, ميداس, ودلتا, وثلاثة أصناف من البطيخ الأحمر الهجين: کريمسون سويت, امبالا, رودروک للإصابة بنيماتودا تعقد الجذور <em>M. incognita</em> .أظهرت النتائج حساسية أصناف الخيار الثلاثة: مکسيموس, ميداس ودلتا للإصابة بنيماتودا تعقد الجذور <em>M.incognita</em>(دليل التعقد<2, ومعامل التکاثر<1), کما أظهرت النتائج حساسية صنفي البطيخ الأحمر رودروک وکريمسون سويت ( دليل التعقد <2, ومعامل التکاثر<1), بينما کان الصنف امبالا مقاوم للإصابة (دليل التعقد =2 , ومعامل التکاثر>1).
أصناف,الخيار، البطيخ الأحمر,نيماتودا تعقد الجذور
https://jppp.journals.ekb.eg/article_87502.html
https://jppp.journals.ekb.eg/article_87502_d1d981a81b89ffe863eb0a9a96286e30.pdf