Weather data for Belchertown MA. Forecast values begin May 21, 2012

Key Dates for European Red Mites

Estimated hatch date of overwintered European red mite (ERM) eggs
and decline in efficacy of suppression by prebloom oil is
Sunday, April 15

Optimum monitoring period for 1st generation ERM:
Tuesday, May 1 (Petal Fall)
to Tuesday, May 15 (early adults ready to lay eggs for 2nd generation)

Optimum monitoring period for 2nd generation ERM:
Thursday, May 31 (nymphs hatched)
to Thursday, June 7 (egglaying starts for 3rd generation)

Optimum monitoring period for 3rd ERM generation is:
Tuesday, June 19 (nymphs hatched)
to Thursday, June 28 (egglaying starts for 4th generation)