Weather data for Greenville RI. Forecast values begin September 2, 2008

Key Dates for European Red Mites

Estimated hatch date of overwintered European red mite (ERM) eggs indicating declining efficacy of prebloom oil treatment is
Sunday, April 27

Optimum monitoring period for 1st generation ERM:
Monday, May 12 (Petal Fall) to
Friday, May 30 (early adults ready to lay eggs for 2nd generation)

Optimum monitoring period for 2nd generation ERM:
Sunday, June 8 (nymphs hatched) to
Friday, June 13 (egglaying starts for 3rd generation)

Optimum monitoring period for 3rd ERM generation is:
Wednesday, June 25 (nymphs hatched) to
Tuesday, July 1 (egglaying starts for 4th generation)