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

Section 8: Population Dynamics and Ecology
Fly Host Location Authors Date Summary
B. zonata Northern Bihar Agarwal and Kumar 1999 Studies on the population dynamics of peach fruit fly, B. zonata, were conducted during April-
August 1997 in northern Bihar. Maximum fly populations were observed during the third week of
June (357.0 flies/trap), whereas the lowest numbers were observed during the last week of August
(14.3 flies/trap). Fly populations showed a positive correlation with maximum and minimum
temperatures, rainfall and a negative correlation with relative humidity.
B. cucurbitae Agarwal et al. 1987 Green, tender fruits are preferred for oviposition and females lay up to 200 eggs. Adults overwinter
in November-December and the pest is most active in July-August.
B. dorsalis Northen Bihar Agarwal et al. 1995 The effects of maximum and minimum temperature and relative humidity on the population
dynamics of B. dorsalis were studied in northern Bihar in 1990-91. The pest population was not
affected by relative humidity; however, it was highest when the temperature was between 25 and
38°C, and significant positive correlations were observed between maximum temperature and pest
population, and minimum temperature and pest population.
B. dorsalis, B.
zonata
Pusa,Bihar Agarwal et al. 1999 Adult males of B. dorsalis and B. zonata were trapped using the attractant methyl eugenol, bait
(protein hydrolysate) and malathion 50 e.c. between April and August 1997, at Pusa, Bihar. The
average number of these flies trapped during the experimentation period was 39.94 and 134.92
flies per trap per week, respectively. The average mean population of B. zonata was 3.38 times
greater than that of B. dorsalis, which indicated population suppression of B. dorsalis by B. zonata.
C. vesuviana Jujube Gujarat Bagle 1992 The incidence of Carpomyia vesuviana on Ziziphus mauritiana was studied in Gujarat, and
attempts were made to determine suitable control measures. Pest attack started around mid-
October and increased suddenly in mid-November (average incidence over 20%), continuing until
December. Of several insecticides tested, fenvalerate at 0.005% and decamethrin [deltamethrin] at
0.0015% were the most effective and consistent in reducing infestation, followed by monocrotophos
and phosphamidon at 0.05%.
B. dorsalis Mango Karnataka Bagle and Prasad 1983 Traps with 100ml of an emulsion containing 0.1% methyl eugenol and 0.255 malathion were used
and weekly counts were made. It was found that population was greatest during March, April, May
and June with average monthly catches per trap of 1268, 270, 416 and 487 flies, respectively. The
lowest catches were made in January, August and December, with average monthly catches per
trap of 42, 71 and 72 flies, respectively.
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