ScienceAsia 5 (1979): 089-096 |doi: 10.2306/scienceasia1513-1874.1979.05.089

LIFE HISTORY OF THE GRAIN ITCH MITE, PYEMOTES TRITICI (ACARINA : PYEMOTIDAE)

PENSRI VAIVANIJKUL

Summary: One of the most common hosts of the grain itch mite, Pyemotes tritici, is the koa haole seed weevil, Araecerus levipennis, which infest the seeds of the koa haole, Leucaena glauca. On this host, mated P. tritici females start to reproduce after 4 to 5 days of feeding and during their life span of 19.9 1.6 (S.D.) days produce an average of 207 9.7 offspring per female. The percentage of parasitism and sex ratio of this mite in the field are also reported.

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Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok. Thailand

Received 8 March 1979