ISOLATION, IDENTIFICATION AND FIELD EVALUATION OF PHEROMONE COMPOUNDS OF FRUIT PIERCING MOTH WITH SPECIAL REFERENCE TO Eudocima materna LINNAEUS (LEPIDOPTERA: EREBIDAE)
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Date
2019-09-17
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UNIVERSITY OF AGRICULTURAL SCIENCES, GKVK BENGALURU
Abstract
The pomegranate fruit-piercing moth, Eudocima materna is a pest of ripening
fruits over much of the tropical and subtropical Southeast Asia, Australia and Western
Pacific Islands. Moths remain active from August to October in India and attacks
ripening fruits of pomegranate. Studies on increasing field attractancy using sex
pheromones have not been undertaken. The current study was initiated to explore the
utility of sex pheromone for its management. The adult emergence of E. materna was
observed throughout the day and not significantly influenced by sex, but by the time of
the day. An age-dependent pattern of calling and mating was observed. The maximum
percentage of calling and mating moths were recorded at 5th h of scotophase. Blend
combinations involving pheromone components with fruit volatiles viz., 2-Ethyl Hexanol
and 3-Ethyl Benzaldehyde elicited a higher antennal response (EAG) and behavioural
responses (Wind tunnel). Fero-T Traps were found better for trapping adult moths. The
field evaluation of 10, 20 and 40μl doses for three superior blends viz., blends-B, Q and
N separately revealed that doses 20 and 40μl were found on par. Whereas, dose 20μl was
found significant compared to other doses in both the blends-Q and N. Comparative field
trials of optimum doses of best-performing blends indicated that 20μl dose of blend-B
significantly trapped more male moths at Kegaon and Hiraj, Solapur, Maharashtara.