SEASONAL DEVELOPMENT RATES OF PEST INSECT POPULATIONS (EXAMPLE OF PEA AGROCENOSIS)
Keywords:
pea agrocenosis, A. pisum, H. armigera, dominant, pest, phytophage, population, seasonal dynamics, regression, Fergana Valley.Abstract
The article presents the population dynamics of the species Acyrthosiphon pisum and Helicoverpa armigera in pea agrocenoses. The research was conducted in the northern part of the Fergana Valley within pea agrocenoses.
Acyrthosiphon pisum (Harris, 1776) is a dominant aphid species in the entomofauna, exhibiting a single peak in its population during the season. The empirical results and approximated indicators demonstrated a level of reliability (tf=3.60; tst=12.59, and P=0.05).
Helicoverpa armigera (Hübner, 1808) shows an increase in its impact on peas in May. The empirical results and approximated indicators for this species also exhibited a reliable level (tf=10.22; tst=16.92, and P=0.05). The second peak occurs in the alfalfa agrocenosis, with reliable results (tf=2.98; tst=16.92, and P=0.05).
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