Comparative assessment of the efficiency of light traps of various design in corn agrocenosis

Abstract

The North Caucasus region in its natural and climatic conditions is a zone favorable for the cultivation of corn in Russia. Significant damage to corn plantings and crop quality is caused by a variety of pests. In connection with the annual crop losses caused by harmful insects, the development of methods for their monitoring and capture are relevant. The efficiency test of two designs of light traps based on super bright LEDs (conical and aspiration) was performed. As a result of the experiment, which lasted for two weeks, more than 260 thousand specimens of insects belonging to 8 orders and 27 families were captured. The traps were most attractive for the representatives of the coleoptera, the proportion of which was 97.5%. Traps were also highly effective in relation to Lepidoptera (1%) and Hemoptera (1.4%). Representatives of other taxa were caught in much smaller quantities; their total share was less than 0.1% of the total. The use of test traps showed their high efficiency for the elimination of the main lepidopteran maize pests - Helicoverpa armigera Hbn. and Ostrinia nubilalis Hbn., which allows them to be used not only for monitoring but also for plant protection. The low attractiveness of traps for Hymenoptera was also revealed, which allows combining their use in the system with the use of entomophages. A comparative assessment of the effectiveness of attracting insects with various designs of light traps in the corn agrocenosis showed the absence of significant differences in species diversity and mathematically significant differences in the number of attracted insects: the conical trap was almost two times more effective.

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