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

Section 15: Chemical Sterilization
Fly Location Authors Year Summary
B.
cucurbitae
B.
cucurbitae
B.
cucurbitae
Adhami 1980 The effects of the chemosterilants apholate, thiotepa and hemel on the sexual vigour and mating
competitiveness of males were determined by caging groups of 25 sixteen days old virgin females with sterilised
and normal males in various ratios. It was found that males that had been treated with apholate and thiotepa
were sexually more competitive than normal males, whereas those treated with hemel were less competitive.
Ansari and
Wadhwani
1972 The mating competitiveness of males of B. cucurbitae Coq. sterilised with 1% hempa in sugar was studied by
allowing treated and untreated males to pair with virgin females of the same age. There was no indication that
mating vigour and sexual competitiveness were reduced by the treatment with hempa. In a test in which the ratio
of normal to treated males was 2:1, the average net sterility was 38.4%, as compared with an expected 33.3%.
Bodhade et al. 1985 Studies were carried out to determine the sterilant activity of petroleum ether and alcohol extracts of ripe pea
seeds and the powdered berries of Melia azedarach against B. cucurbitae. The extracts were added to the larval
diet at doses of 10, 20, 30, 40 or 50 mg/1.5 g glucose.There was a linear relationship between the dose of the
extracts (up to 40 mg) and the reduction in egg viability. Higher doses of alcohol extracts of both plants reduced
egg hatch; that of pea did not affect fecundity.
B. cucurbitae Kaur and Rup 2002 The topical treatment given to freshly emerged (0- to 1-day-old) male and female adults of B. cucurbitae, a serious pest of
cucurbit crops in tropical countries, with 25, 125, 625 and 3125ppm concentrations of gibberellic acid (GA3), IAA, kinetin and
coumarin showed a significant adverse influence on the reproductive potential of this fruit fly. The assessment for
reproductive potential was made on the basis of reduction in fecundity and fertility of laid eggs and measured as sterility in
females and shortening of the longevity, i.e. ovipositional phase. The strongest influence was with kinetin, followed closely by
coumarin, then GA3 and lastly with IAA treatments. It was concluded that although these compounds demonstrate their
activities differently in plants and might be following a different mode of action in insects, they ultimately influence the
reproductive potential of this insect.
B.
cucurbitae
B.
cucurbitae
Khan 1976 The effects of three chemosterilants on B. cucurbitae Coq. are described from reciprocal crossing experiments
in the laboratory with treated and untreated adults. Hempa reduced the fecundity of females, and at a
concentration of 0.5% no eggs were laid.
Khan 1976 The oviposition period of females treated with tepa, metepa and hempa (especially hempa) was reduced. The
degree of sterility was increased when both sexes were treated with chemosterilant.
Integrated Management of Fruit Flies in India: Knowledge Review 74 of 110