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Kushwaha, Deepak
- Tree Growth and Biomass Production in Melia azedarach on Farm Boundaries in a Semi-arid Region
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Source
Indian Forester, Vol 132, No 1 (2006), Pagination: 105-110Abstract
Representative eight-year old trees of Melia azedarach planted in single line (2 m apart) on farm boundary were felled for estimation of aerial biomass production. The trees were grouped into three diameter classes. Maximum number of trees were recorded in the diameter range of > 22 cm. The trees contributed a total biomass production of 21.1 t/ha of which 66, 24 & 10 per cent were contributed by minor timber, firewood and fodder, respectively. Considering the overall phytomass production, the additional productivity in a rainfed farm was estimated to be 2.64 t/ha/year on a rotation of eight years. Biomass prediction equations based on regression analysis with D2, dbh and D2H were developed. The relationship of bole and total aerial biomass was found to be strong with all the predictor variables whereas relationship of foliage was strong with D2 and D2H only.
- Biology and Feeding Potential of Eocanthecona furcellata (Wolff) on its Lesser Known Prey, Spilosoma obliqua (Walker)
Abstract Views :283 |
PDF Views:109
Authors
Affiliations
1 ICAR-Indian Institute of Vegetable Research, Varanasi-221305, Uttar Pradesh, IN
1 ICAR-Indian Institute of Vegetable Research, Varanasi-221305, Uttar Pradesh, IN
Source
Journal of Biological Control, Vol 34, No 2 (2020), Pagination: 109-112Abstract
Eocanthecona furcellata (Wolff) (Hemiptera: Pentatomidae) is an important polyphagous predator of several agricultural, horticultural and forest insect pests. The biology and feeding potential of E. furcellata were investigated on Bihar hairy caterpillar, Spilosoma obliqua (Walker), a lesser known prey under laboratory conditions. Gravid female laid on an average 203.6±12.56 eggs during its life time. Nymphs passed through five instars in 22.25 to 27.25 days and developed into adults. First instar nymphs had the shortest duration (2.5 to 3.25 days) while fourth instar took maximum days (5.5 to 6.5) to complete, while second, third and fifth instars completed in 5.07 ± 0.26, 5.20 ± 0.71 and 5.24 ± 0.39 days, respectively. Female bugs were bigger in size and lived up to 28 days, while males survived up to 18 days when fed on second instar larvae of S. obliqua. Neonate nymphs devoured 1.6 larvae of S. obliqua while second, third, fourth and fifth instar nymphs consumed 7.73, 11.93, 12.13, 18.67 larvae of S. obliqua, respectively. Individual male and female in their adult stage consumed average 84.25 and 125.5 larvae, respectively, and total consumptions were 136.31 and 177.56 larvae during their life-cycle. From the study, it is evident that S. obliqua could be used as an alternative host to mass rear E. furcellata under laboratory conditions when the main host is scarce or not available.Keywords
Biology, Eocanthecona furcellata, Feeding Potential, Predator, Spilosoma obliqua.Full Text
References
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