Spraying insecticide 10-20 days after peak flight targets the highest number of larvae emerged from these eggs. Peak flight describes the period when the highest numbers of moths are active in an area and are likely laying eggs. Low activity (150) – although not an insecticide action threshold – indicates that other criteria need to be investigated and met for insecticide application to be justified. The total number of moths caught in trap indicates activity (Figure 2). ![]()
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