Journal article

Publication year: 1995

Pages: 221-226

Journal: Journal of Applied Entomology

Volume number: 119

Issue number: 3

ISSN: 0931-2048

eISSN: 1439-0418

DOI Link: https://doi.org/10.1111/j.1439-0418.1995.tb01274.x

Publisher: Wiley

Abstract: 
Late second and early third gregarious nymphal instars of the desert locust (Schistocerca gregaria Forskal) were sprayed with enriched neem oil (0.2% and 0.4% azadirachtin/l diluant oil) at an application rate of 10 l/ha. A change of the colour from the black and yellow gregarious type to a pale yellow transient and a green solitary type was observed during the following 33 days. In the treated nymphs the proportion of pale yellow and green coloured hoppers was significantly higher than in the untreated control. The change of colour was less profound at high population density (500 individuals/cage) compared to low population density (150 individuals/cage). The proportion of nymphs with damaged antennae and legs mainly as a consequence of the treatment was higher in green coloured hoppers compared to pale yellow transient and black and yellow gregarious hoppers.

Harvard Citation style: LANGEWALD, J. and SCHMUTTERER, H. (1995) COLOR-CHANGE IN THE DESERT LOCUST, SCHISTOCERCA-GREGARIA (FORSK) (ORTH, CYRTACANTHACRIDINAE), INDUCED BY TOPICAL TREATMENT WITH AZADIRACHTIN-ENRICHED NEEM OIL IN SEMIFIELD TRIALS IN BENIN AT DIFFERENT POPULATION-DENSITIES, Journal of Applied Entomology, 119(3), pp. 221-226. https://doi.org/10.1111/j.1439-0418.1995.tb01274.x

APA Citation style: LANGEWALD, J., & SCHMUTTERER, H. (1995). COLOR-CHANGE IN THE DESERT LOCUST, SCHISTOCERCA-GREGARIA (FORSK) (ORTH, CYRTACANTHACRIDINAE), INDUCED BY TOPICAL TREATMENT WITH AZADIRACHTIN-ENRICHED NEEM OIL IN SEMIFIELD TRIALS IN BENIN AT DIFFERENT POPULATION-DENSITIES. Journal of Applied Entomology. 119(3), 221-226. https://doi.org/10.1111/j.1439-0418.1995.tb01274.x