Bioefficacy of Emamectin Benzoate against American Bollworm, Helicoverpa armigera Under Field Conditions. | ||
| Journal of Plant Protection and Pathology | ||
| Article 3, Volume 12, Issue 10, October 2021, Pages 679-685 PDF (948.4 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jppp.2021.88187.1027 | ||
| Author | ||
| Mariam Mosaad Morsy* | ||
| Plant Protection Department, Faculty of Agriculture, Zagazig University, Egypt | ||
| Abstract | ||
| American bollworm, Helicoverpa armigera is the foremost insect that negatively affected cotton crops around the world. A field experiment was conducted at the Sedi-Salem area, Kafr El-Sheikh Governorate,Egypt to assess the bioefficacy of emamectin benzoate 5 SG(EB)on cotton against H. armigera.The tested pesticides were used as a foliar application under field conditions at the2019-2020season.The experiment was designed in plots of 5 m × 5 m size using a randomized block design (RBD) with seven different treatments.A pneumatic knapsack sprayer was used for foliar application of tested pesticides. Three doses of EB @ 7, 11, and 15 g a.i./ha were evaluated against the pest under study. Furthermore, endosulfan 35 EC, Proclaim®, Spinosad 45 SC, and an untreated blank were also included in the field experiment. The findings concluded that 11 g a.i./ha of EB was the active dose for controlling the larval population of H. armigera.This dose caused a 64.75% reduction of boll damageover an untreated check at the end of observation in the field experiment.The yield ranged from 16.00 to 19.66 q/ha in all treatments.EB at 15 g a.i./ha was a very effective dose which was on par with the final results of 11 g a.i./ha.Entirely EB treatments augmented seed cotton yield under field conditions as compared to the control plot. The study demonstrates the potentiality of EB as an eco-friendly bioinsecticide against the American bollworm.The effective doses of EB @ 11and 15 g a.i./ha should be used in the cotton field to manage the infestation of H. armigera. | ||
| Keywords | ||
| Eco-friendy; Emamectin Benzoate; Helicoverpa armigera; Cotton | ||
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