Radadia, G. G.Patel, Chetan Subhashbhai2018-05-182018-05-182001-09CHETAN SUBHASHBHAI PATEL_33263http://krishikosh.egranth.ac.in/handle/1/5810046602Investigations on bionomics and non-chemical control measures of pulse beetle, Callosobruchus maculatus (F.) in stored Indian bean were carried out in the laboratory of Department of Entomology, N. M. College of Agriculture, Gujarat Agricultural University, Navsari during 2000-2001. The main hosts preferred for oviposition were Indian bean, rajma (French bean), pigeonpea, pea, green gram and cowpea. Black gram and kidney bean were less preferred for oviposition and orientation of adults whereas gram and lentil were avoided by the pest for oviposition as well as orientation of adults. Indian bean, cowpea, green gram and pigeonpea were preferred for development. During survey for infestation of C. maculatll$ minimum seed infestation with egg(s) and larval hole(s) were recorded in the month of May and March-2000 and it raised to the maximum during February and January-2000, respectively.The larva was the only damaging stage. A single larva made a large excavation in the cotyledons. Infested seeds became unfit for human consumption. Cumulative percentage real weight losses during first, second and third generation were 12.37, 51.92 and 57.03, respectively. When there was upto 2 to 3 larvae developed, seed gelluination was not adversely affected and could be used for sowing purpose. The freshly laid eggs were watery, semi-transparent, elongated and flatten and became white after hatching. The average incubation period was 6.2 ± 0.77,6.2 ± 0.41,6.13 +0.52 and 5.8 + 0.68 days on Indian bean, pigeonpea, cowpea and green gram, respectively. Larval period, pupal period and total developmental period varied from 15.33 ± 1.17 to 17.33 ± 0.90,6.4 ± 0.74 to 7.84 ± 1.68 and 24.93 ± 1.09 to 25.80 ± 1.25 days, respectively on different pulses viz., Indian bean, cowpea, pigeonpea and green gram. The sex ratio of male to female ranged from I : 0.66 to I : 0.87 in different hosts. Pre-oviposition and post-oviposition period was more or less similar on all hosts whereas oviposition period varied from 4.42 ± 0.04 to 5.28 + 0.49 days. Average fecundity of female was 63.0 + 9.69, 66.0 ± 8.40, 58.0 + 4.42 and 65.4 ± 10.11 eggs on Indian bean, cowpea, pigeonpea and green gram, respectively. Longevity of male and female ranged from 7.4 + 0.55 to 8.4 ± 1.52 and 6.8 ± 0.45 to 7.4 ± 1.44 days, respectively whereas total life cycle of male and female varied from 32.33 ± 1.64 to 34.2 ± 2.78 days and 31.73 ± 1.54 to 33.2 ± 2.49 days on different hosts. All the hosts tested were found suitable for growth and development of C. maculatus.The pulse beetle, C. macula/us completed thirteen overlapping generations in a year on Indian bean seeds. Two different parasitoids, Uscana lariophaga Steffan, attacking egg stages and Daniarmus basalis (Rondani) attacking larval and pupal stage of C. macula/us were reported during the study period. Maximum number of eggs (257.28) laid by a female paired with three male whereas minimum number of eggs laid by a female (45 .69 eggs) when paired with single male. When seed had upto 6 eggs, larval mortality was zero. Similarly upto 8 eggs per seed, egg and pupal mortality was zero per cent while upto 7 eggs per seed, adult mortality was not observed. After that mortality was increased with the increases of egg density per seed and maximum mortality of various stages was recorded when seed had 14 eggs. Thirteen varieties of Indian bean were tested for their relative resistance and susceptibility to C. macula/us. The varieties WE-17, NW-1l7, NW-120 and NW-Red-4 were moderately resistant, varieties WE-7, WE-8, WE-14, NW-1l4, NW-1l6, NW-118 and NWRed- 3 were moderately susceptible and varieties WE-I and NW-Red-l were susceptible. Effect of various vegetable oils with different concentration on adult mortality, oviposition, egg hatching and adult emergence showed that as the concentration increased, adult mortality was increased whereas oviposition, number of egg hatching and number of adult emergence were decreased. Interaction of oils and its concentration proved that karanj oil at 0.75 per cent concentration was most effective for adult mortality, oviposition and egg hatchingwhereas in case of emergence of adults, castor oil 0.75 per cent was most effective followed by neem oil and karanj oil both at 0.75 per cent concentration. When one, two and three days old eggs exposed to solar heat for one, two and three days it was found that with the increased of exposure period hatching percentage decreased for one day old eggs, however in case of two and three days old eggs, two days exposure was comparable with three days exposure. Adult emergence was also adversely affected by solar heat as not a single adult emerged from any treatment except control.ennullThesis