EFFICACY AND COST-BENEFITS OF USING COMBINED FOLIAR FERTILIZERS AND INSECTICIDES AGAINST SPINY BOLLWORM Earias insulana (LEPIDOPTERA: NOCTUIDAE) ON OKRA

Document Type : Full research articles

Authors

1 Cotton Bollworms Department, Plant Protection Research Institute, Agricultural Research Center (ARC), Alexandria, Egypt

2 Vegetables, Medicinal, Aromatic and Ornamental plant pests Department, Plant Protection Research Institute, Agricultural Research Center (ARC), Alexandria, Egypt

3 Fruit Fly Department, Plant Protection Research Institute, Agricultural Research Center (ARC), Alexandria, Egypt

Abstract

The combined impact of two foliar fertilizers and three insecticides was evaluated against spiny bollworms during field experiments for two consecutive growing seasons 2024 and 2025 on okra plants at the Faculty of Agriculture farm, El-Shatby, Alexandria. Crop yield and spiny bollworm infestation were estimated. The results showed that the highest efficacy was attained by Power Mix30% / NasrThrin Super® giving the lowest infestation of Earias insulana (0.47 and 0.53 larvae /10 plants) during both seasons, respectively, followed by Power Mix30%/ Emmy-Miner® (0.77 larvae /10 plants) in season 2024, while Power Mix30% / Protecto® gave (0.83 larvae /10 plants) in season 2025. Power Mix30% / NasrThrin Super® increased the okra yield up to (4675.23 and 4841.55 kg) during both seasons and gave the best cost-benefit ratio (1:12.30) during season 2025. During season 2024, Power Mix30% / Emmy-Miner® gave the best cost-benefit ratio (1:15.08(. These findings suggest that the combined application of certain foliar fertilizers and insecticides, particularly Power Mix30% with Nasr Thrin Super ®, is a promising strategy for effective management of spiny bollworm infestation, leading to improved okra productivity and economic returns under field conditions.

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