Vol. 6 (1) : January-February 2015 issue
Green Farming Vol. 6 (1) : 133-136 ; January-February, 2015
Biology and life-table of Spodoptera litura (Fab.) on sunflower
S. GEETHA1* and K.S. JAGADISH2
Deptt. of Agriculture Entomology, University of Agricultural Sciences, GKVK, Bengaluru - 560 065 (Karnataka)
Designation : 1SRF *(kallesh.geetha5@gmail.com), 2Professor
Subject : Entomology
Paper No. : P-1663
Total Pages : 4
Received : 13 March 2014
Revised accepted : 10 December 2014
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Citation :
S. GEETHA and K.S. JAGADISH. 2015. Biology and life-table of Spodoptera litura (Fab.) on sunflower. Green Farming Vol. 6 (1) : 133-136 ; January-February, 2015
ABSTRACT
Biology and Life table of Spodoptera litura (Fab.) on sunflower were undertaken during 2012-13 at Zonal Agricultural Research Station, UAS, Bengaluru. The incubation period of the eggs of S. litura varied from 2.94 to 3.01 days, with an average of 3.01±0.06, larvae took 5.88 to 14.19 days to complete five instars with an average of 15.12±0.93 days, pupal period varied from 9.87 to10.33 days with a mean of 10.07±0.16 days and the longevity of male moths varied from 4.33 to 6.91days with a mean 6.03 ± 1.12 days. Female moths lived longer than the male moths. The life span of female moths varied from 6.91- 11.91 days with a mean of 9.40 ± 1.81 days. Life fecundity table were studied for S. litura on sunflower under laboratory conditions at 26.6 to 30.40C. The net reproductive rate (R0) was 506.30 females with the generation period (T) of 45.72days. The innate capacity (rm) and finite rate (?) of increase were found to be 0.18 and 1.15 females/day, respectively with a weekly multiplication rate of 2.5945 times. The per cent contribution of eggs, larvae, pupae and adults were 45.96, 47.16, 5.72 and 1.17, respectively at stable age distribution of S. litura on sunflower.
Key words :
Biology, Life-table, Spodoptera litura, Sunflower.