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Insect Migration

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Fig. 10.1 Migration of S.gregaria

flight heading is exhibited by Nocturnal fliers. Sometimes these insects get concen-

trated into shallow altitudinal zones. The atmospheric turbulence is another important

factor to be considered seriously for long distance migrations in insect flight towards

downwind direction [4].

Recently, Chemical signal(s) of Pheromone for migratory locusts as 4-VA

(Vinylan-isale) have been reported which induce swarming in solitary locusts says

Prof. Le Kang, Chinese Academy of Science, Institute of Zoology. This chemical

is released by hind legs, and the odor is detected by the antennae of other locusts.

Swarms can include billions of locusts and cover hundreds of square miles.

The presence of 4-VA has to established and suitable mild pesticides maybe

suggested so that Human Health and Crop problems can be attended. The 4-VA

secretion which induces swarming behavior has to be prevented by using suitable

chemical. 4-VA needs further research (Deccan Chronicle Report 14th August 2020).