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Field Release of Trichogrammatoidea bactrae, Hymenoptera: Trichogrammatidae an Effective Biological Agent of Pink Bollworm (Pectinophora gossypiella, Lepidoptera: Gelechiidae) of Cotton (Gossypium hirsutum L.)

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Light and Low Temperature Effects on the Shelf Life of Different Development Stages of Trichogrammatoidea bactrae, Hymenoptera: Trichogrammatidae

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Abstract:

The experiment was conducted to determine the shelf life for 20, 40 & 60 days of different development stages of Trichogrammatoidea bactrae at three different temperatures (0,4,& 8 C) with two light/dark regimes (9/15 light/dark hours & complete darkness). It was observed that under the conditions of this test, the best shelf life (>57% adult emergence) was obtained when pupae were held at 8 C for any holding time tested. Among the environmental factors tested (temperature, holding time and photoperiod) temperature was the most important. T. bactrae might overwinter either in egg or pupal stage.

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