ROLE OF INSECT GROWTH REGULATORS (IGRs) FOR COTTON LEAFWORM; Spodoptera Littoralis BOISD. AND CONSERVING TO SOME PREDATORS IN SUGAR BEET FIELDS | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 7, Volume 5, Issue 12, December 2014, Page 1089-1096 PDF (295.9 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2014.88033 | ||||
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| Author | ||||
| Amira Ibrahim* | ||||
| Economic Entomology Dept., Fac. Agric., Kafrelsheikh Univ. | ||||
| Abstract | ||||
| The cotton leafworm, Spodoptera littoralis Boisd. is considered the most dangerous insect pest which threat the early sugar beet plantations. Because the conventional insecticides lead to much hazards to natural enemies, it has been important to find out other alternative safe technique. The current investigation was conducted at sugar beet fields in 2013 and 2014 seasons at Shenno village (Kafr El-Sheikh Governorate) for evaluating the effect of one conventional compared to insect growth regulators (anti-moulting) on larval mortality of S. littoralis and their side effects on certain predators mainly (Chrysoperla carnea Setphens and true spiders). Field tests proved that the insect growth regulators caused high reductions in larvae populations, ranging between 93.39 and 94.98% where are almost the same with conventional one (94.88%) . The insect growth regulators caused a low reduction in Chrysoperla carnea and true spiders populations (35.54 – 40.51%), while the conventional insecticide caused a high reduction in these predators by 93.39%. This investigation show that the insect growth regulators were efficient in reducing the larvae populations of S. littoralis, and in the same time caused a low reduction on predators in comparison with the conventional one. | ||||
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