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Eastern New York Field Crops Pest Report, 2003
Hello Field Croppers:
Alfalfa looked very good and was 3 to 5 inches tall at the SUNY Cobleskill farm on Friday, April 25th.
Alfalfa Weevil: April 15th of last year I saw many adult alfalfa weevils in fields at SUNY Cobleskill. So far this season I have not yet seen one adult weevil. Do you think all of the snow killed them this winter? Most likely not and they will soon invade alfalfa fields. The big question is "how do we determine if alfalfa weevil is causing economic loses in the fields?" Below is the procedure for monitoring alfalfa weevil:
Monitor alfalfa weevil weekly from mid to late-April through June. Because weevil populations can build up over the life of the alfalfa stand, monitoring fields that are two or more years in production is critical to determine infestation levels. Start weekly field sampling in fields at about 350 degree-days (base temperature 48F0) which is about mid to late April.
Before the first cutting, if 40% of the stem tips show feeding damage, you are at the "action threshold".
Check out our on-line publication,
for Alfalfa Weevil. 1.2 Mb pdf file
Be Prepared! Seed Corn Maggot May Find Your Fields!
For more information on SCM management check out Early Season Insect Pests of Corn, 1Mb pdf file
Early Season Corn Diseases
For more information on early season disease management visit our web page on Field Corn Diseases.
Worms in Field Corn and Other Crops
Is it a bird or a plane? No, it's true armyworm and black cutworm coming to fields near you! (Or NOT?) Check your next issue of the Eastern New York Field Crops Pest Report.