Effect of Vapor-heat on Tetranychus urticae (Acarina: Tetranychidae) and Pseudococcus comstocki (Hemiptera: Pseudocoocidae) on Fresh Winter Pumpkins

摘要

All developmental stages of two-spotted spider mite, Tetranychus urticae KOCH and Comstock mealybug, Pseudococcus comstocki KUWANA on fresh winter pumpkins, Cucurbita moschata DUCH. were treated by vapor-heat at 47°C for 0, 5, 10, 20, 40, 60 and 120min. The two-spotted spider mite adult was likely to be the most tolerant to vapor-heat of all developmental stages of the two pests. All stages of the two pests were killed completely by vapor-heat for 120 min. at pumpkin temperature of 47°C.