BIO-ECOLOGY AND MANAGEMENT OF MELON FRUITFLY, BACTROCERA (DACUS) CUCURBITAE COQUILLETT ON BITTER GOURD (MOMORDICA CHARANTIA L.)
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Date
2001
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Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu
Abstract
The studies were carried out during premonsoon and monsoon season. 2000 atSKUAST(J). Vegetable Reseaich Farm, Pounichak. Adult B. cucurbitae population was monitored by using attractant (bait) traps which consists of molasses 100 ml impregnated with malathion (2.00%) The first trap catches of B. cucurbitae adults was recorded during 21st standard week (27-5-2000) wherein 3.0 and 2.5 flies were collected from the traps kept at 1.0 and 1.5 m above the ground level. The trap catches increased with the inaturity of the crop and highest mean number (125.75. 160.75 and 180.25 adults were collected from the traps placed at 1.0, 1.5 and 2.0 meter (m) height, respectively during the 30th standard week which coincided with the last pickuig of the crop, Among the various abiotic factros, the trap catches had a significant negative correlation with the maximum temperature and sunshine hours. The first incidence of B. cucurbitae in the fruits (4%) was recorded during 24th standard week. The infestation increased with the age of the crop and ranged-between 4, to 72 per cent during the crop period. A significant positive correlation was found between fruit infestation and trap catches kept at different heights. Amongst the different varieties screened against B. cucurbitae, Local-R and B-G-F1 Navin supported significantly lower infestation (3.0 and 3.33 infested fruits/10 fruits) compared to other varieries. However, highest fruit infestation was recorded in Coimbatore Long and Green long (7.33) compared to Jaunpuri
Long (6.33), Jhalari (5.00), Pusa Vishesh (5.33) and Pusa Doumausami (5.00) after 112 days after sowing. The treatments in order of their descending efficacy after 10 days of second spray behaved as cypermetimn (0.02 %) > malathion (0.05 %) > maiathion (0.05 %) + molasses/protein hydrolysate (1:4) > neem seed extract (0.3 %) > cartap hydrochloride (0.05 %) > poisoned cut melon pieces treated with malathion (0.05 %) > ashing > untreated check (water spray) which recorded 1.00, 1.33, 1.33, 3.33, 3.33, 4.00, 5.00 and 7.33 infested fruits/10 fiuits.
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No. of references 105