Document Type : Original Article
Authors
1
Entomology Unit, Department of Plant Protection, Desert Research Center, Cairo, Egypt
2
2Department of Plant Protection, Faculty of Agriculture, Cairo, Al-Azhar University, Egypt
Abstract
To control the black cutworm (BCW), Agrotis ipsilon (Hufnagel) with eco-friendly pesticides, the latent effects of certain plant extracts (PEs) (Camphor, Sea ambrosia, and Thorn apple) and pyriproxyfen were studied on pupae, adults and the next generation that resulted from 3rd larval instar that was treated with LC50 values under laboratory conditions. The results suggested that all the investigated compounds decreased pupation% in comparison with control. The reduction % of pupation was 57.39, 44.98, 41.85 and 37.98% for pyriproxyfen, Damsissa, Datoora and Cafoor leaf extracts, respectively. Also, pupal duration was increased significantly by 23.33, 18.89, 12.66 and 12.16% for pyriproxyfen, Damsissa, Datoora and Cafoor, respectively. While pupal weight was reduced by 44.11, 36.22, 27.90 and 20.66% for pyriproxyfen, Damsissa, Datoora and Cafoor, respectively. The reductions in adult emergence were 59.41 (pyriproxyfen), 24.38 (Damsissa), 19.72 (Datoora) and 13.94% (Cafoor). The fecundity, fertility and sterility index of adult females and males resulting from treated larvae showed better effects for all treatments: sterility % was reached to 82.00, 69.78, 49.00 and 29.78% for pyriproxyfen, Damsissa, Datoora and Cafoor, respectively. The male and female longevity (days) was also reduced than untreated control. Next generation stages were affected by all treatments and the general reduction of mortality % were 45.07 (pyriproxyfen), 21.90 (Damsissa), 13.99 (Datoora) and 9.46% from all stages. Generally, pyriproxyfen and plant extracts could be recommended as eco-friendly alternatives to conventional chemical insecticides for control of A. ipsilon insect pest.
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