Sweet Corn
European corn borer (ECB) catches remain too low to register a map image. This flight has been extremely low and very spotty. ECB feeding in NJ sweet corn plantings is nearly non-existent now. What remains has been overshadowed by fall armyworm (FAW) feeding. Check 5 plants each in 10 random locations for a 50 plant sample. Look for “shot-hole” injury, and consider treating when the number of infested (from ECB or FAW) plants in a 50 plant sample exceeds 12%. Once plants hit full tassel, ECB larvae will move downward on the stalk and re-enter the plant near the area where ears are forming. This can result in direct injury to the ear. For growers who still have corn that has yet to silk, consider an insecticide application at the full tassel stage to target ECB larvae as they migrate downward. This application can eliminate larvae that have escaped any earlier insecticide applications. [Read more…]
Vegetable Crops Edition
Seasonal updates and alerts on insects, diseases, and weeds impacting vegetable crops. New Jersey Commercial Vegetable Production Recommendations updates between annual publication issues are included.
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Veg IPM Update: Week Ending 9/13/17
Veg IPM Update: Week Ending 9/06/17
Sweet Corn
European corn borer (ECB) catches are very low, and with cooler evening temperatures through the weekend, not enough ECB have been captured to register a map image. This flight has been extremely low and very spotty. ECB feeding in NJ sweet corn plantings is nearly non-existent now. What remains has been overshadowed by fall armyworm (FAW) feeding. Check 5 plants each in 10 random locations for a 50 plant sample. Look for “shot-hole” injury, and consider treating when the number of infested (from ECB or FAW) plants in a 50 plant sample exceeds 12%. As infested plants proceed to the pre-tassel stage, live larvae and damage may be found in the emerging tassels. Once plants hit full tassel, ECB larvae will move downward on the stalk and re-enter the plant near the area where ears are forming. This can result in direct injury to the ear. Growers should consider an insecticide application at the full tassel stage to target ECB larvae as they migrate downward. This application can eliminate larvae that have escaped any earlier insecticide applications. [Read more…]
Veg IPM Update: Week Ending 8/30/17
Sweet Corn
European corn borer (ECB) catches have remained very low, but blacklight traps have captured just enough to register a map image (see map at left). This flight has been extremely low and very spotty. ECB feeding in NJ sweet corn plantings remains very low, and has been largely obscured by fall armyworm (FAW) feeding. Check 5 plants each in 10 random locations for a 50 plant sample. Look for “shot-hole” injury, and consider treating when the number of infested (from ECB or FAW) plants in a 50 plant sample exceeds 12%. As infested plants proceed to the pre-tassel stage, live larvae and damage may be found in the emerging tassels. Once plants hit full tassel, ECB larvae will move downward on the stalk and re-enter the plant near the area where ears are forming. This can result in direct injury to the ear. Growers should consider an insecticide application at the full tassel stage to target ECB larvae as they migrate downward. This application can eliminate larvae that have escaped any earlier insecticide applications. [Read more…]
Vegetable Disease Update – 8/30/17
- Late blight has not been reported on tomato or potato in NJ to date. If you suspect Late blight on your farm please contact your county Extension agent. To track the progress of Late blight in the US please visit USAblight.
- Cucurbit downy mildew (CDM) on cucumber continues to be reported throughout the region. All cucumber growers should add downy mildew specific products to their regular maintenance programs. CDM has also been reported on giant pumpkin, cantaloupe, and butternut squash in PA and on pumpkin and watermelon in DE, VA, and MD to date. All pumpkin and watermelon growers are encouraged to include downy mildew specific fungicides in their regular weekly maintenance programs. To track CDM movement in the US please visit the North Carolina State University’s CDM Forecasting Website.
Veg IPM Update: Week Ending 8/23/17
Sweet Corn
European corn borer (ECB) catches have again declined to levels that do not permit a map image. This flight has been very sporadic. ECB feeding in NJ sweet corn plantings is very low, and has been largely obscured by fall armyworm (FAW) feeding. Check 5 plants each in 10 random locations for a 50 plant sample. Look for “shot-hole” injury, and consider treating when the number of infested (from ECB or FAW) plants in a 50 plant sample exceeds 12%. As infested plants proceed to the pre-tassel stage, live larvae and damage may be found in the emerging tassels. Once plants hit full tassel, ECB larvae will move downward on the stalk and re-enter the plant near the area where ears are forming. This can result in direct injury to the ear. Growers should consider an insecticide application at the full tassel stage to target ECB larvae as they migrate downward. This application can eliminate larvae that have escaped any earlier insecticide applications. [Read more…]
Vegetable Disease Update – 8/22/17
- There have been a few reports of late blight in PA this past week. Late blight has not been reported in NJ to date. If you suspect Late blight on your farm please contact your county Extension agent. To track the progress of Late blight in the US please visit USAblight.
- Cucurbit downy mildew (CDM) on cucumber continues to be reported throughout the region. All cucumber growers should add downy mildew specific products to their regular maintenance programs. CDM has also been reported on giant pumpkin, cantaloupe, and butternut squash in PA and on watermelon in VA and MD to date. To track CDM movement in the US please visit the North Carolina State University’s CDM Forecasting Website.
- Bacterial canker and bacterial leaf spot in tomato are being reported.
- Bacterial leaf spot is also being reported in pepper.
- Pepper anthracnose has been reported in the past week.
- Cucurbit powdery mildew and anthracnose in cucurbit crops have been reported.
