BIO-ECOLOGY AND MANAGEMENT OF INVASIVE LEAF-MINER, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) IN TOMATO
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Date
2019-12
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UHF,NAUNI
Abstract
ABSTRACT
The present study entitled “Bio-ecology and management of the invasive leafminer,
Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) in tomato” was carried out under
laboratory and field conditions at Department of Entomology, Dr. YS Parmar University of
Horticulture and Forestry, Nauni, Solan (HP) India during 2015-19. Tuta absoluta has spread
to almost all the tomato growing areas of the state with incidence ranging from 1-10 mines
per leaf. Biological and population parameters of T. absoluta varied significantly with
temperature and host plant. Tomato as host and temperature around 25-30 oC were the most
ideal and suitable for its growth and development. Tuta absoluta required 500 degree-days
with developmental thresholds of 7.5 oC to complete the development from egg to adult.
Nesidiocoris tenuis was found to be an efficient predator with type II functional response to
the pest. Based on LC50 values the order of toxicity of the tested insecticides to the pest was
chlorantraniliprole > flubandiamide > novaluron > thiamethoxam > imidacloprid >
indoxacarb > λ-cyhalothrin > quinalphos > spiromesifen. Under field conditions all the tested
insecticides reduced T. absoluta population significantly over control with chlorantraniliprole
to bethe most effective.
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