Melon Thrips, Thrips palmi Karny (Thysanoptera: Thripidae)
Until the mid 1970s, the distribution of melon thrips was limited to Southeast Asia. In recent years it has spread throughout Asia, and to many Pacific Ocean islands, North Africa, Australia, Central and South America, the Caribbean region and southernmost mainland USA (Florida). It has the potential to infest greenhouse crops widely, but under field conditions likely will be limited to tropical and subtropical areas.
A complete generation may be completed in about 20 days at 30°C, but it is lengthened to 80 days when the insects are cultured at 15°C. Melon thrips are able to multiply during any season that crops are cultivated but are favored by warm weather and suppressed by senescent crops. In southern Florida, they are damaging on both autumn and spring vegetables. In Hawaii, where vegetables are grown during the summer months, they also become numerous during the summer growing season.
Eggs are deposited in leaf tissue, in a slit cut by the female. One end of the egg...
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