The effectiveness of insecticide use against cotton bollworm and corn borer on corn crops

Abstract

Purpose. The purpose of the research is to study the impact of the insecticide and the effectiveness of its use by different methods of application on corn plants against cotton bollworm and corn borer in the central part of the Forest-Steppe of Ukraine. Methods. The research was conducted during 2023–2025 in the conditions of the Agroko Agricultural Production Complex, Cherkasy region. The soil of the experimental plots was black soil. Weather and climatic conditions were typical for the Forest-Steppe zone of Ukraine and favorable for growing corn. The experimental scheme involved studying the methods of using the insecticide Ampligo (0.3 l/ha) by different methods of application. The sown area of the plot was 224.0 m2. The placement of variants in the experiments was systematic and sequential. The repetition of the experiment was fourfold. The agricultural technology of growing corn was generally accepted for the conditions of the Forest-Steppe of Ukraine, except for the factors under study. The sowing of the SI Pandoras corn hybrid was carried out in the 3rd decade of April, at a soil temperature of 8–10 °C at the depth of seed embedding. Results. It was studied that the mass appearance of pests was observed in the growth and development phase of corn plants ВВСН 51 and ВВСН. It was established that in the variant with the use of the insecticide Ampligo, the number of damaged corn plants was significantly lower than in the control variant. On average, with the application of the insecticide, the total number of damaged plants decreased to 2 pcs./100 plants from damage by the corn stem borer and to 5 pcs./100 plants from damage by the cotton bollworm. Conclusions. The high effectiveness of the insecticide Ampligo against the corn borer was established at 95.1 % and the cotton bollworm at 75.3 % compared to the control plot using a self-propelled sprayer with a solution rate of 150 l/ha.