Pink bollworm seasonal distribution, yearly variation, and male moth trap catch relationships to population increases in cotton
1990
Chu, C.C. | Henneberry, T.J.
We studied the within- and between-seasonal changes of catches of pink bollworm, Pectinophora gossypiella (Saunders), male moths in gossyplure-baited live traps installed in cotton fields each year from 1981 to 1988 at the Imperial Valley Irrigated Desert Research Station, Brawley, CA. Results showed that the seasonal average number of male moths caught from 1 May to 31 August varied from 12.9 ± 3.0 per trap per night in 1982 to 150.2 ± 18.4 in 1981. Mean number of male moths caught per trap per night was highly correlated with minimum air temperatures, with r-values ranging from 0.22 to 0.50 (P < = 0.001). The number of male moths caught from March to June was correlated significantly with the number caught from July to August, indicating that early spring trapping may be used to identify potential problem fields (P < = 0.01). However, no significant predictive relationship occurred between male moth catches in the fall of the year and those in the spring of the following year.
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