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What are the occurrence patterns of the black locust moth?

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Occurrence patterns of the black locust moth: In Shandong it has 2 generations a year, overwintering as second-generation larvae of various instars inside thin silken cocoons in tunnels in the trunk. In late March of the following year they become active and feed and cause damage, and mid-May is the peak period of adult emergence. Eggs are mostly laid in wounds on branches and trunks or in bark crevices, and first-generation larvae begin hatching in mid-June. Newly hatched larvae are active and agile, burrowing under the bark and feeding on the phloem and cork cambium layers, forming vertical, irregular tunnels. The damaged areas proliferate and swell, and the bark splits and curls. In mid-July mature larvae begin to pupate, adults can be seen in late July, mid-August is the peak period of adult emergence, and

Occurrence patterns of the black locust moth: In Shandong it has 2 generations a year, overwintering as second-generation larvae of various instars inside thin silken cocoons in tunnels in the trunk. In late March of the following year they become active and feed and cause damage, and mid-May is the peak period of adult emergence. Eggs are mostly laid in wounds on branches and trunks or in bark crevices, and first-generation larvae begin hatching in mid-June. Newly hatched larvae are active and agile, burrowing under the bark and feeding on the phloem and cork cambium layers, forming vertical, irregular tunnels. The damaged areas proliferate and swell, and the bark splits and curls. In mid-July mature larvae begin to pupate, adults can be seen in late July, mid-August is the peak period of adult emergence, and from early August to mid-September is the hatching period of second-generation eggs and larvae, with larvae overwintering one after another by late October.

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