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Effect of radiant insecticide on the biology and egg's hatchability of chrysoperla carnea (Stephens) (Neuroptera: chrysopidae) [electronic resource].

By:

Shaalan, H. S

Contributor(s):

Kandel, Mervat A. A

Language: English Summary language: Arabic Description: P. 701-710Other title:

تأثير مبيد الرادينت علي فقس البيض و بعض الخصائص البيولوجية لاسد المن [Added title page title]

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Egyptian journal of agricultural research, 2010 v. 88 (3) [electronic resource].

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In: Egyptian Journal of Agricultural Research 2010.v.88(3)Summary: Effect of Radiant (insecticide) on developmental stages and reproduction of Chrysoperla carnea (Stephens) resulted from treated eggs were estimated. The LC₂₅, LC₅₀ and LC₉₅ values for radiant-treated 1-2 days old eggs were 0.625, 1.875 and 27.323 ppm, respectively. The results indicated that the percentage of hatchability, larvae formed cocoons and adult emergence were differently and high affected by different concentrations, when reared on two preys, Pectinophora gossypiella (Saund.) eggs and AphiS craceivora nymphs. The obtained results showed a prolongation in (larval+cocoon) period resulted from eggs treated with LC₅₀ and reared on P. gossypiella or A. craccivora compared to control, this period was estimated by 19.5 and 17.8 days, respectively, compared to 16.9 and 15.9 days for the controls. The larval feeding capacity of C carnea highly differed significantly between larvae resulted from treated egg and fed on P. gossypiella eggs or A. craccivora nymphs compared to control. The results indicated also high shortening in longevity of females and males and high reduction in total eggs laid and percentage of hatchability.

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Effect of Radiant (insecticide) on developmental stages and reproduction of Chrysoperla carnea (Stephens) resulted from treated eggs were estimated. The LC₂₅, LC₅₀ and LC₉₅ values for radiant-treated 1-2 days old eggs were 0.625, 1.875 and 27.323 ppm, respectively. The results indicated that the percentage of hatchability, larvae formed cocoons and adult emergence were differently and high affected by different concentrations, when reared on two preys, Pectinophora gossypiella (Saund.) eggs and AphiS craceivora nymphs. The obtained results showed a prolongation in (larval+cocoon) period resulted from eggs treated with LC₅₀ and reared on P. gossypiella or A. craccivora compared to control, this period was estimated by 19.5 and 17.8 days, respectively, compared to 16.9 and 15.9 days for the controls. The larval feeding capacity of C carnea highly differed significantly between larvae resulted from treated egg and fed on P. gossypiella eggs or A. craccivora nymphs compared to control. The results indicated also high shortening in longevity of females and males and high reduction in total eggs laid and percentage of hatchability.

Summary in Arabic.

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