Island Apple IPM
May 4, 2010
We are getting near the end of primary apple scab season, but we are there yet. Keep your trees protected with fungicide.
I’ve heard reports of plum curculio scars in neighboring states. Warm, humid weather this week is perfect for plum curculio activity and some varieties have fruit large enough for plum curculio to scar (7 mm). If you have not applied a petal fall insecticide yet, do it soon. By the weekend temperatures are predicted to cool off. This will slow down plum curculio but a lot of damage can happen before the cool down. Insecticides effective against plum curculio include Imidan, Actara, Avaunt, and Calypso.
I’ve seen some egglaying of European apple sawfly near the calyx end of small developing fruit. Petal fall insecticide applications will control this pest as well.
I intend to visit several orchards tomorrow and will give a more informed
message on Wednesday, May 5th