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Lygus besperus Knight, a common polyphagous insect pest of certain widely grown California crops, undergoes a seasonal facultative diapause. Experiments described here were conducted upon both field-collected and laboratory-raised L. besperus populations and have demonstrated the critical effects of photoperiod and temperature upon the inception, termination, nullification, and intensity of diapause in this species.
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Beards et al. (1966) studied this question.
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