What is the occurrence pattern of the black locust seed chalcid?
The occurrence pattern of the black locust seed chalcid is: it has 2 generations a year, and overwinters as second-generation larvae inside the seeds. The overwintering-generation larvae begin to pupate in early to mid-May, and adults emerge and lay eggs in mid to late May. Second-generation larvae appear from late May to early June. In mid-June the first-generation larvae begin to pupate, and from late June to early July the first-generation adults emerge. Second-generation larvae appear from late June to mid-July and overwinter inside the seeds. The timing of each generation of this insect varies with climatic conditions, but it is consistent with the seed
The occurrence pattern of the black locust seed chalcid is: it has 2 generations a year, and overwinters as second-generation larvae inside the seeds. The overwintering-generation larvae begin to pupate in early to mid-May, and adults emerge and lay eggs in mid to late May. Second-generation larvae appear from late May to early June. In mid-June the first-generation larvae begin to pupate, and from late June to early July the first-generation adults emerge. Second-generation larvae appear from late June to mid-July and overwinter inside the seeds. The timing of each generation of this insect varies with climatic conditions, but it is consistent with the seed formation period of the black locust.