Vol. 10, Special Issue 12 (2021)

Author(s):
Gore SH, More DG, Bhokse DV and Fand DN

Abstract:
Effective and economic suppression of insect pests in sunflower ecosystem by the judicial use of pesticides on the basis of economics threshold levels (ETL) is very essential. Investigations on economic threshold level for Helicoverpa armigera Hubner were carried out in College of Agriculture Latur, Maharashtra during rabi, 2020. On the basis of equality of management cost and revenue of sunflower yield which was saved from pest damage as suggested by Stone and Pedigo (1972) ^[12] and further modified by Ogunlana and Pedigo (1974) ^[6], the Economic Threshold Level worked out for H. armigera on sunflower was 0.77 larvae/plant.