The efficiency of control of the number of Helicoverpa armigera Hbn. in sunflower sowings

Sergey Semerenko,Nadezhda Bushneva

doi:10.1051/e3sconf/202022202035

Abstract

The insect Helicoverpa armigera Hbn. (Lepidoptera: Noctuidae) is a widespread species in the Palearctic. It is considered one of the main pests of many agricultural crops, annually causing more than $ 2 billion of losses to agriculture in the world. Therefore, insecticide treatment of sowings is crucial in pest control. The frequent application of pesticides increases resistance in insects, resulting in an increase in dosage and (or) in the usage of new highly toxic chemicals. Consequently, the search for reliable means of pest control remains a problem. In 2017-2019, we studied the efficiency of insecticides against H. armigera in sunflower sowings at V.S. Pustovoit All-Russian Research Institute of Oil Crops (Krasnodar). In 2017, the colonization of sunflower heads with H. armigera caterpillars was at the level of 3.2 specimen/plant, in 2018 – 4.5 specimen/plant, in 2019 it reached 6.0 specimen/plant. Bifetrin + Chlorpyrifos, EC (87 %) and Chlorantraniliprole, SC (91 %) showed the highest biological efficiency. Fitoverm-M, EC was the best organic insecticide – 56 %. The treatment of sunflower plants with Beta-cypermethrin + Dimethoate, EC (standard) and Chlorantraniliprole, SC in a production experiment contributed to a significant decrease in the number of caterpillars – 71.7 and 97.0 %, respectively. The yield reliably exceeded the control one, the kept yield was 0.23-0.39 t/ha.

Highlights

The insect Helicoverpa armigera Hbn. (Lepidoptera: Noctuidae) is a widespread species in the Palearctic
The aim of the research was to determine the field efficiency of modern insecticides applied for protection of sunflower sowings against damage by H. armigera caterpillars in the Krasnodar region of the Russian Federation
By the experiment variants, the sunflower yield was at the level of 2.30-2.70 t/ha, the kept yield was 0.09-0.40 t/ha

Summary

Introduction

The insect Helicoverpa armigera Hbn. (Lepidoptera: Noctuidae) is a widespread species in the Palearctic. The H. armigera caterpillars feed on 300 plant species, including agricultural commercially important crops, and cause more than $ 2 billion of losses to agriculture in the world [4, 5]. In the Russian Federation, phytophage caterpillars inhabit 120 plant species. Most of all they harm tomato, corn, soybean, and sunflower [6]. In agriculture of the Krasnodar region, sunflower is considered the main oil crop, the annual yield losses from H. armigera damage reach 35 %.

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Conclusion