In tests conducted in Riverside County, California, in 1970, overwintered pink bollworm moths, Pectinophora gossypiella (Saunders), migrated at least 35 miles to infest an isolated field of cotton. Then high temperatures during late June and early July drastically reduced the population. However, later migrants during August and September of 1970, and also in 1971, produced sufficient larvae to cause significant damage to the crop
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Bariola et al. (1973) studied this question.
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