At these times nymphs develop into winged adults and migrate to new host plants. Once settled down, these aphids begin reproducing and the life cycle continues as before. During winter, however, feeding and reproduction occur at a much slower rate. Many generations are produced each year. Fungus diseases, high temperatures, damp weather, and hard rains also limit aphid populations.
Cultural practices are helpful in avoiding aphid populations.
Crops should be planted in well-prepared, fertile seedbeds to promote vigorous growth. When possible, avoid planting sites near infested fields or from which an aphid-infested crop has been removed. A number of insecticides are available to control aphids on a wide variety of crops. However, repeated applications of certain carbamate insecticides within intervals of a week or less are frequently conducive to aphid buildups. For specific chemical recommendations, consult the current North Carolina Agricultural Chemical Manual .