Pelargonium graveolans @ 420 jug. Vetiveria zizanioides and Ocimum basilicum @ 490 ug/nymph resulted in 90, 85 and 83 per cent molfcrmations respectively. No adult emergence was observed in all the three extracts at the doses of 420 and 600 ug/nymph. The percentage of malformed adults was in the order of efficacy in P. graveolans (180 lug/nymph> 0 basilicum (420 and 600/ug/nymph) > V. ziz- anioides (600 lug nymph) treatments. P. graveolans. V. zizanioides and 0. basilicum affected the ovarian development in juvenilised adults. P. graveolens induced 86.2 and 87.5 per cent sterility @ 60 ug/adult in the mating combinations of treated male and untreated female and normal male and treated female respectively. Total fat and total free amino acid contents of the ovaries of adults treated with P. graveolans, V. zizanioides and 0. bacilicum were less than in untreated adults.
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Madras Agricultural Journal (MAJ)
Madras
Agricultural Students Union
Tamil Nadu Agricultural University
Coimbatore - 641 003
Tamil Nadu, India.
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