TOXICOLOGICAL AND BIOLOGICAL EFFECTS OF CERTAIN PLANT EXTRACTS ON LARVAL STAGE OF BLACK CUTWORM UNDER LABORATORY CONDITIONS | ||||
| Egyptian Journal of Desert Research | ||||
| Volume 75, Issue 1, June 2025, Page 71-89 PDF (440.28 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejdr.2025.358494.1198 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Doaa R. Sallam   1; Ramadan M.A. El-Kholy2
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| 1Entomology Unit, Department of Plant Protection, Desert Research Center, Cairo, Egypt | ||||
| 2Department of Plant Protection, Faculty of Agriculture, Cairo, Al-Azhar University, Egypt | ||||
| Abstract | ||||
| The black cutworm (BCW), Agrotis ipsilon (Hufnagel) (Lepidoptera: Noctuidae) is distributed in many countries of the world and cause great losses on most vegetables and field crops. Under laboratory conditions, the toxicity of plant extracts (Camphor, Sea ambrosia and the Thorn apple) and pyriproxyfen as insect growth regulators (IGR) were investigated on the larval stage of black cutworm Agrotis ipsilon. The new 3rd larval instar were treated with different concentrations (ppm) of the tested materials. Results clearly indicated that the pyriproxyfen (LC50 value was 275.40 ppm) was the most effective than other plant extracts (PEs). The LC50 values were 3850.36, 4230.15 and 4375,22 ppm for Damsissa, Camphor and Datoora leaf extracts, respectively. Treatments reduced food consumption, feeding ratio and larval weight, whereas increased larval duration and larval mortality %. The most effective compound was pyriproxyfen followed by Damsissa, Datoora and the least were Cafoor leaf extracts, respectively. The joint action of PEs at LC25 with pyriproxyfen at LC25 values showed that the mixture with Damsissa leaf extract was potentiation, followed by the mixture with Datoora and the mixture with Cafoor leaf extract (additive action). The corresponding rates of Co-toxicity factor were 39.51, 27.87 and 17.65% of the mixture with Damsissa, Datoora and Cafoor leaf extracts, respectively. This study concluded that the plant extracts and pyriproxyfen have insecticidal activity against Agrotis ipsilon larvae and the mixture of previous plant extracts with pyriproxyfen has a good result on larvae, especially with Damsissa leaf extracts and is possibly used as an alternative to conventional chemical insecticides. | ||||
| Keywords | ||||
| Agrotis ipsilon; toxicity; food consumption | ||||
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