Figures 6.13


Solitary and gregarious females of the migratory locust, Locusta migratoria (Orthoptera: Acrididae).
Figures 6.13. Solitary and gregarious females of the migratory locust, Locusta migratoria (Orthoptera: Acrididae).

The solitaria adults have a pronounced pronotal crest and the femora are larger relative to the body and wing than in the gregaria adults. Intermediate morphologies occur in the transiens (transient stage) during the transformation from solitaria to gregaria or the reverse.

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  Age-specific oviposition rates of three predators of cotton pests, Chrysopa sp. (Neuroptera: Chrysopidae), Micromus tasmaniae (Neuroptera: Hemerobiidae), and Nabis kinbergii (Hemiptera: Nabidae), based on physiological time above respective development thresholds of 10.5°C, —2.9°C, and 11.3°C.
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  Flow diagram depicting the derivation of the “ecoclimatic index” (EI) as the product of population growth index and four stress indices.