Bulletin of Entomological Research (1971) 60, 439-446

M.L. Kok (1971)
Laboratory studies on the life-history of Valanga nigricornis nigricornis (Burm.) (Orth., Acrididae)
Bulletin of Entomological Research 60 (3), 439-446
Abstract: All developmental stages of Valanga nigricornis nigricornis are described. Nymphal instars (normally six in the male and seven in the female) could be distinguished by the development of the external genitalia. Under laboratory conditions (mean 28°C and 80% RH) the life cycle took 6½ -8½ months and the mean fecundity was 158 eggs per female. Crowding tended to slow female maturation and reduce fecundity. Life cycle data are compared with those of three species of locust. It is suggested that the relatively long life-cycle and low fecundity of V. n. nigricornis preclude the possibility of it becoming a serious widespread pest.
(The abstract is excluded from the Creative Commons licence and has been copied from Acridological Abstracts with permission by NRI, Univ. of Greenwich at Medway.)
Link to article at publishers website

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.
	Valanga nigricornis