Reference Report for IND82039195
Title: | Consumption and development of velvetbean caterpillar as influenced by soybean phenology Anticarsia gemmatalis, southeastern USA. |
Authors: | Moscardi, F., Barfield, C.S., Allen, G.E. |
Source: | Environ. Entomol. 1981, 10(6):880-884 |
Abstract: | In studies in Florida, the effects of soyabean cv. Bragg phenology on leaf consumption and development of Anticarsia gemmatalis Hb. were investigated at 26.7 plus or minus 1 deg C, LD 14:10 and RH >80%. Soyabean plant stages were designated as early vegetative (V2-V5), late vegetative (V5-V8), flowering (R1-R2), pod set to pod fill (R4-R6) and senescent (R7-R8). Mean leaf fresh weight consumed by 4th- and 5th-instar larvae of A. gemmatalis declined as plant phenology progressed. Dry-weight consumption did not tend to decline with plant phenology and was more uniform for all plant growth stages than the fresh-weight values. Mean larval development time varied from 12.6 to 14.3 days, and mean time from egg hatch to adult varied from 21.9 to 23.4 days when larvae were fed late-vegetative and senescent foliage, respectively. Larvae fed senescent leaves produced pupae with reduced weight. The sex ratio (male/female) varied from 0.83 (flowering stage) to 1.37 (late-vegetative stage). |