In spring, adults initially infest peanuts near the edges of fields and lay eggs. From these eggs hatch larvae which soon develop into nymphs. After each larval and nymphal stage, there are resting stages. The new adults mate soon after emerging from the last resting stage. Each generation requires 5 to 20 days to mature depending upon environmental conditions.
Development is most rapid during hot, dry weather.
There are several preventive practices that growers should follow in areas with a past history of spider mite infestations. Growers should choose fungicides that do not contribute to mite build-up. Keep field margins and turn rows clear of grass and weeds throughout the growing season. If weeds are present, do not destroy them during the growing season. This will intensify the mites' migration from their overwintering sites to the peanuts.