Spraying for the Control of Onion Thrips in Massachusetts

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Abstract
This pest (Thrips tabaci) causes serious losses annually in commercial plantings of onions. In the Connecticut Valley region of Massachusetts, the situation is aggravated by the widespread practice of growing "seed" onions close to fields of "sets." Dusts, because of their physical drawbacks and the peculiar nature of the plant and the habits of thrips, have thus far proven ineffective. A combined spray of nicotine sulfate and a soft, pourable, potash fish-oil soap has given satisfactory control.

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