THE Annual cycle of limothrips cerealium haliday (thysanoptera) and its distribution in a wheat field
1959
LEWIS, T.
Terrestrial and aerial populations of L. cerealium were studied simultaneously; ovarian dissections were made to detect different generations. The annual life cycle can be arbitrarily divided into six stages based primarily on the amount of flight activity: the females feed mainly on winter cereals and grasses in spring, many moving to later sown cereals in June and July, where most eggs are laid in the sheaths of the young leaves. First generation females leave cereals in August to feed on grasses before entering hibernation. Wheat ears with a water content of less than approx. 45% were not favoured by thrips. When winds blew consistently from the same quarter the initial infestation was greatest on the windward edge of the wheat crop.
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