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Exigências térmicas e estimativa do número de gera??es de Bonagota cranaodes (Meyrick) (Lepidoptera: Tortricidae) em regi?es produtoras de ma?? do Sul do Brasil

DOI: 10.1590/S0301-80592000000400002

Keywords: insecta, ecology, behaviour, threshold temperature, apple leafroller.

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Abstract:

the thermal requirements of the apple leafroller bonagota cranaodes (meyrick) (lepidoptera: tortricidae) were estimated at four constant temperatures (14, 18, 22 e 26oc) in laboratory (70±10% r.h. and 14:10l:d). artificial diet was fed to the insects. the low threshold temperature and thermal requirement for eggs, larvae, pupae and biological cycle (egg to adult) were 7,2 e 140; 7,1 e 410; 6,4 e 183 e 6,8oc and 745 gd, respectively. it was estimated that this species complete three to four annual generations. in the three regions, one generation occurs during the winter.

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