Most Sugar snap peas require trellising because of the long vine length. Diseases and insects usually are not a serious problem in production of this crop in the home garden. Diseases that may be a problem include root rots, powdery mildew, Fusarium wilt, and viruses. Root rots and Fusarium wilt can be reduced by the use of resistant varieties and planting this crop on a well-drained soil. Insect problems may include aphids and seed corn maggots.
Aphids are a problem because they transmit viruses to the pea plant.
Contact your county Extension office for methods to control these diseases and insects. Crop rotation is important for production of a high-yielding crop. Do not plant peas or beans in a given area of the garden more often than once every 3 years. Harvest Peas are ready to harvest about 55-70 days after planting. Standard podded peas and Sugar snap peas should be harvested when the peas have filled the pod but are still tender.