Increasing the potentiality of three predacious insects, by starvation [electronic resource].

Includes reference.

Efficiency of the three larval predacious insects, Coccinella undecimpunctata L., Chilocorus bipustulatus L., and Chrysoperla camea Steph. larvae along with adults of the two former coccinellid beetles were estimated after varied periods of starvation (2, 4, 6, 8, 10,24, and 26 hours). Starved individuals were reared on Aphis gossypii Glover under laboratory conditions. Results showed that starved larvae as well as adults of coccinellids were more positively to the preys as compared to those without starvation. The successive four larval instars of C. undecimpunctata showed a maximum response after 4h., 8h., 10h., and 26h. of starvation, since the average numbers of consumed aphids / larvae were 26.8. 60.4, 99.2, and 108.6 respectively for its successive four larval instars. In case of Ch. bipustulatus, the same periods of starvation (4h., 6h., 10h., and 26h.) gave the maximum response, since the average numbers of consumed aphids / larvae were 24.4, 56.2, 90.4, and 102.4, respectively. For the successive four larval instars.

Summary in Arabic.

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