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“Key Informant Survey” of Production, Value, Losses and ... - DfID

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B. dorsalis Thakur <strong>and</strong> Kumar 1987 Adults were treated with 5, 3, 2, 0.5 or 0.1% thiotepa. Treatment reduced the insemination capacity <strong>of</strong> males,<br />

based on the presence <strong>of</strong> sperm in the spermathecae <strong>of</strong> females, by 50%. There was no effect on the male<br />

accessory gl<strong>and</strong> fluid. It is suggested that thiotepa has no adverse effect on normal mating behaviour in this<br />

species<br />

B. dorsalis Himachal<br />

Pradesh<br />

Thakur <strong>and</strong> Kumar 1988 The sterilant effects <strong>of</strong> ethyl methanesulfonate (EMS) on B. dorsalis were studied in the laboratory, using insects<br />

collected from the field in Himachal Pradesh. Aqueous <strong>and</strong> acetone solutions both induced significant sterility in<br />

both sexes, but the aqueous solution was most effective.<br />

B. dorsalis Thakur <strong>and</strong> Kumar 1988 Newly emerged females topically treated with thiotepa at 0.5 <strong>and</strong> 1.0% had smaller ovaries than untreated flies.<br />

The reduction in size, however, was not dose dependent. Histological examinations showed that thiotepa<br />

caused contraction, vacuolization <strong>and</strong> degeneration <strong>of</strong> the ooplasm leading the arrest <strong>of</strong> yolk formation <strong>and</strong><br />

subsequent immaturation <strong>of</strong> the oocytes.<br />

B. dorsalis Thakur <strong>and</strong> Kumar 1988 The chemosterilant thiotepa caused significant reduction in testis size when applied topically to newly emerged<br />

adult males <strong>of</strong> the tephritid B. dorsalis [B. dorsalis] at s a dose <strong>of</strong> 1 mul per fly <strong>and</strong> a concn. <strong>of</strong> 0.1 or 0.5%. The<br />

reduction in testis size was not dose-dependent, <strong>and</strong> was increasingly apparent as days after treatment<br />

increased.<br />

B. cucurbitae Wadhwani <strong>and</strong> Khan 1983 Studies were carried out to determine the effects <strong>of</strong> sublethal doses <strong>of</strong> toxic baits on the reproductive potential <strong>of</strong> B.<br />

cucurbitae Coq. There was a significant increase in the preoviposition period <strong>and</strong> a reduction in fecundity when adults were<br />

fed on baits containing sodium arsenite, sodium arsenate or malathion. With baits containing dieldrin or carbaryl (Sevin),<br />

pesticidal stress was apparent in 3rd-generation adults.<br />

Integrated Management <strong>of</strong> Fruit Flies in India: Knowledge Review 76 <strong>of</strong> 110

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