Tetranychus urticae Koch (Acari: Tetranychidae) is one of the most important insect pests of tomatoes in greenhouses as well as open cultivation throughout the world. Nesidiocoris tenuis (Reuter) (Hemiptera: Miridae) is a polyphagous predatory bug, which is commonly found in tomato ecosystems. The present study was aimed at studying the predatory potential of N. tenuis against T. urticae. Results of this study indicate that all stages of the bug are highly predacious against T. urticae. Male nymphs consumed 11.8, 55.5, 66.3, 75.3, and 78.3 mites at the rate of 5.9, 18.5, 33.2, 37.6, and 39.1 mites per day for instars 1–5, respectively. The rate of consumption by female nymphs was 15.9, 61.8, 81.1, 88.8, and 90.1 mites at the rate of 7.9, 20.6, 40.6, 44.4, and 43.0 mites per day for instars 1–5, respectively. The overall consumption by female bugs (1137–1430 mites) was also higher than that of males (858–1092 mites). Augmentative releases of later instar nymphs of N. tenuis against T. urticae might therefore assure better mite control.
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