Effects of interspecific competition and dietary stress on the velvetbean caterpillar and the soybean looper Pseudoplusia includens, Anticarsia gemmatalis.

Reference Report for IND83061307

Title:	Effects of interspecific competition and dietary stress on the velvetbean caterpillar and the soybean looper Pseudoplusia includens, Anticarsia gemmatalis.
Authors:	King, E.W.
Source:	J. Ga. Entomol. Soc. 1983, 18(2):176-181
Abstract:	In laboratory tests in the USA at 27 deg C, 65-70% RH and LD 14:10, larvae of Pseudoplusia includens (Wlk.) and Anticarsia gemmatalis Hb. were confined in double pairs (2 examples of each species) in petri dishes (9 cm in diameter) and fed soyabean leaflets either ad libitum or at 80% normal ration for 5 days prior to the expected day of pupation. The effects of the 2 constraints, i.e., interspecific competition and reduced rations, were noted in terms of pupal weight, and larval development time and mortality. The data indicated that, under competition alone, the pupal weight increased in both species and, under food rationing alone, the pupal weight decreased in both species. The net result of the simultaneous application of both constraints was a reduction in pupal weight. Both constraints together produced a greater larval mortality in A. gemmatalis than in P. includens; in the latter species, pupation was significantly delayed

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