. Emergence and premating behavior patterns of the adult European pine shoot moth in western Washington. Figure 1.—Daily field emergence pattern of 32 male and 38 female adult European pine shoot moth at Seattle, Washington, 1965. 45_ 40 35 30 25 20 15 10. / o—o 0600 0800 1000 1200 1400 1600 1800 2000 2200 TIME OF DAY () the total emergence occurred between 0600 and 1000 hours. These data agree closely with records from infestations in Ontario (Green 1 965). Our studies also recorded the emergence patterns by sex (table 2). The early morning peak was similar for both sexes, but only the
. Emergence and premating behavior patterns of the adult European pine shoot moth in western Washington. Figure 1.—Daily field emergence pattern of 32 male and 38 female adult European pine shoot moth at Seattle, Washington, 1965. 45_ 40 35 30 25 20 15 10. / o—o 0600 0800 1000 1200 1400 1600 1800 2000 2200 TIME OF DAY () the total emergence occurred between 0600 and 1000 hours. These data agree closely with records from infestations in Ontario (Green 1 965). Our studies also recorded the emergence patterns by sex (table 2). The early morning peak was similar for both sexes, but only the females showed an evening peak. In 1966, daily emergence was diurnal but lacked the definite morning peak. Only 55 percent of the total emergence occurred before 1000 hours, whereas emergence during comparable periods was 70 percent in Ontario in 1 958 (Green 1 965) and 76 percent in Seattle in 1965. This variation in emergence pattern is attributed to differences in weather. Comparing Seattle weather for the 2 years shows the study period in 1965 was about average with temperatures below normal on 3 days and above normal on 3 days. Cloud cover averaged 50 percent for the daylight hours with 1 day completely overcast and 1 day with a trace of morning rain. In 1 966, the weather was abnormal with temperatures below normal on all 9 days of the study. Cloud cover averaged 80 percent, with 3 days completely overcast and 4 days with rain recorded in the — Data taken from Weather Bureau records, Local Climatological Data, Seattle- Tacoma Airport, Washington. 5. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Coulter, W. K; Pacific Northwest Forest and Range Experiment Station (Portland, Or. ). Portland, Or. : Pacific Northwest Forest and Range Experiment Station, U. S. Dept. of Agriculture,
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