Environmental Entomology (1986) 15, 779-783

D.L. Anazonwu and S.J. Johnson (1986)
Effects of host and density on larval color, size, and development of the velvetbean caterpillar, Anticarsia gemmatalis (Lepidoptera: Noctuidae)
Environmental Entomology 15 (4), 779-783
Abstract: Differences in larval coloration of velvetbean caterpillars, Anticarsia gemmatalis Hübner, reared on two soybean cultivars under two crowding regimes and two photoperiodic regimes were associated with crowding and sex. Forty-seven percent of crowded and 6% of uncrowded larvae were black. Crowding was associated with a significant decrease in pupal and adult weights. Time from egg hatch to pupation increased when larvae were fed the resistant cultivar 'Tracy' and reared under the 14:10 (L:D) photoperiod. Differences in larval coloration were also obtained when larvae were reared on black locust and kudzu foliage and under crowded regimes. Sixty-seven percent of uncrowded larvae were green and 24% of crowded larvae were green. Sixty-one percent of total larvae reared on black locust were black and 21% of total larvae reared on kudzu were black. Larvae took less time to pupate when reared on black locust than on kudzu.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Seth J. Johnson

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Anticarsia gemmatalis	Soybean (Glycine max)	U.S.A. (mid S)