Abstract
Between July and December, pits (30 em deep) were excavated in sugar maple forests to determine the vertical distribution of pear thrips, Taeniothrips inconsequens (Uzel). In well-drained, fine sandy loam, 67.3% of the larvae occurred in the upper 10 cm and 40% of the thrips were located in t∼e upper 4 cm, whereas during dormancy, only 21% of the thrips were found that deep. In early June, when larvae reenter the soil, thrips were commonly found in the litter, but by mid-June, vertical distribution had stabilized, suggesting that downward movement of thrips into the soil had ceased.
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