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What are the occurrence patterns of the black locust aphid?

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Occurrence patterns of the black locust aphid: it produces more than 20 generations a year, overwintering as wingless solitary aphids, nymphs, or a small number of eggs on the roots, stems, and leaves of legumes such as wild alfalfa; in March and April of the following year it reproduces on the overwintering host, and in late April winged parthenogenetic females are produced and migrate to legumes such as black locust (Robinia pseudoacacia) and Chinese scholartree (Sophora japonica) where they cause damage. Damage occurs throughout the year, with the heaviest damage at the early flowering stage of black locust; by October winged aphids again migrate to the host to reproduce, cause damage, and overwinter. The most suitable temperature for aphid reproduction is 19 to 22 degrees Celsius, with relative humidity of 65% to 70%; when the temperature is below

Occurrence patterns of the black locust aphid: it produces more than 20 generations a year, overwintering as wingless solitary aphids, nymphs, or a small number of eggs on the roots, stems, and leaves of legumes such as wild alfalfa; in March and April of the following year it reproduces on the overwintering host, and in late April winged parthenogenetic females are produced and migrate to legumes such as black locust (Robinia pseudoacacia) and Chinese scholartree (Sophora japonica) where they cause damage. Damage occurs throughout the year, with the heaviest damage at the early flowering stage of black locust; by October winged aphids again migrate to the host to reproduce, cause damage, and overwinter. The most suitable temperature for aphid reproduction is 19 to 22 degrees Celsius, with relative humidity of 65% to 70%; when the temperature is below 15 degrees Celsius or above 25 degrees Celsius, and when the relative humidity is above 85%, reproduction is limited to a certain extent.

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