In the laboratory, 82-99% of late second instar Franklinothrips orizabensis Johansen larvae abandoned avocado branches and artificial branches constructed of wooden dowels and were recovered below ...
DR. V. B. WIGGLESWORTH reported in NATURE of May 12 on the detection of a hormone which initiates moulting and pupation in a tropical bug. In the pupation of flies a very similar principle is acting, ...
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