Mohamed, N., Saleh, A., Ghanim, A. (2013). STUDIES ON THE EFFECT OF CONSTANT TEMPERATURE DEGRRES AND SOME MEALYBUG SPECIES AS PREYS ON THE BIOLOGICAL ASPECTS OF Nephus inludens (KIRSCH) (COLEOPTERA: COCCINELLIDAE).. Journal of Plant Protection and Pathology, 4(11), 933-944. doi: 10.21608/jppp.2013.87657
Nadia E Mohamed; A. A. A. Saleh; A. A. Ghanim. "STUDIES ON THE EFFECT OF CONSTANT TEMPERATURE DEGRRES AND SOME MEALYBUG SPECIES AS PREYS ON THE BIOLOGICAL ASPECTS OF Nephus inludens (KIRSCH) (COLEOPTERA: COCCINELLIDAE).". Journal of Plant Protection and Pathology, 4, 11, 2013, 933-944. doi: 10.21608/jppp.2013.87657
Mohamed, N., Saleh, A., Ghanim, A. (2013). 'STUDIES ON THE EFFECT OF CONSTANT TEMPERATURE DEGRRES AND SOME MEALYBUG SPECIES AS PREYS ON THE BIOLOGICAL ASPECTS OF Nephus inludens (KIRSCH) (COLEOPTERA: COCCINELLIDAE).', Journal of Plant Protection and Pathology, 4(11), pp. 933-944. doi: 10.21608/jppp.2013.87657
Mohamed, N., Saleh, A., Ghanim, A. STUDIES ON THE EFFECT OF CONSTANT TEMPERATURE DEGRRES AND SOME MEALYBUG SPECIES AS PREYS ON THE BIOLOGICAL ASPECTS OF Nephus inludens (KIRSCH) (COLEOPTERA: COCCINELLIDAE).. Journal of Plant Protection and Pathology, 2013; 4(11): 933-944. doi: 10.21608/jppp.2013.87657
STUDIES ON THE EFFECT OF CONSTANT TEMPERATURE DEGRRES AND SOME MEALYBUG SPECIES AS PREYS ON THE BIOLOGICAL ASPECTS OF Nephus inludens (KIRSCH) (COLEOPTERA: COCCINELLIDAE).
1Plant protection Research Institute, Agricultural Research Center, Dokki
2Economic Entomology Department, Faculty of Agriculture, Mansoura University, Egypt.
Abstract
Laboratory experiments were carried out in the Insectary of Economic Entomology Department, Faculty, of Agriculture, Mansoura University, from the beginning of February 2012 tell the end of March 2013 under three constant temperature degrees (20±1, 25±1 and 30±1Co) to study the influence of three constant temperature degrees on certain biological characteristics of the coccinellid predator Nephus includens (Kirsch) when reared on the third nymphal instars of Planococcus citri Risso, Icerya seychellarum (Westwood) and Maconellicoccus hirsutus (Green) The data cleared that with increasing the temperature degrees the duration periods of the immature stages decreased, with significant differences. The obtained results revealed that the average of total consumption per larva was the highest at 25±1oC and when this predator fed on the mealybug species P. citri during its larval stage. The results revealed that, the longevity of the predator adult stage decrease with increasing the temperature degrees, also it can be noticed that, the highest consumption rate per female at 30±1oC comparing with the other temperature degrees. The number of deposited eggs per female was the highest 185.74± 1.92 eggs when this predator female reared on P. citri at 25±1oC. As a conclusion the best mealybug species for the mass rearing this predator on P. citri at 25±1oC comparing with the other tested mealybug species and the other temperature degrees.
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