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.
 
Subscriptions are available via EMAIL and RSS.
 
Quick Links:

NJ Commercial Vegetable Production Recommendations

Rutgers Weather Forecasting - Meteorological Information important to commercial agriculture.

July 22, 2015

Veg IPM Update: Week Ending 7/22/15

Sweet Corn

Click to View

Click to View

European corn borer (ECB) adult activity is starting to increase in parts of the state now. This is the beginning of the second adult flight. Areas of highest activity are currently along the Delaware Bay Shore and in central Morris County (see ECB map), but areas between should fill in over the next week.

As always, consider treating when the number of infested plants in a 50 plant sample exceeds 12%. Any planting remaining at or above threshold as it proceeds to full tassel should be treated, as this is the last stage at which ECB larvae will be exposed and vulnerable to insecticidal sprays.

See the 2015 Commercial Vegetable Recommendations Guide for insecticide choices.
[Read more…]

Filed Under: Vegetable Crops
July 22, 2015

Cucurbit Downy Mildew Reported: Watermelon & Butternut Squash in NJ ALERT – 7/22/15

Cucurbit downy mildew has been reported on watermelon (Warren County) and butternut  squash (Hunterdon County) in Northern New Jersey. This is the first report on both crops this season. Downy mildew was confirmed on cucumber in New Jersey on July 9th.

All cucurbit growers should include downy mildew specific fungicide(s) in their weekly programs. For more information on the controlling downy mildew on all cucurbit crops please see the 2015 Commercial Fungicide Recommendations Guide. To track the progress of cucurbit downy mildew in the US please visit http://cdm.ipmpipe.org/

Filed Under: Vegetable Crops
July 20, 2015

Vegetable Disease Briefs – 7/20/15

  • There have been no new reports of late blight in New Jersey since 7/8. To track late blight in the US please visit http://usablight.org/
  • Cucurbit downy mildew has been reported on cucumber in New Jersey and on cucumber and butternut squash in PA this past week. To track the progress of CDM in the US please visit http://cdm.ipmpipe.org/.
  • Bacterial leaf spot is being reported on pepper and tomato.
  • Basil downy mildew remains active across the region.
  • Phytophthora blight has been reported on multiple crops.
  • Pepper anthracnose has been reported in southern New Jersey.

 

Filed Under: Vegetable Crops
July 15, 2015

Veg IPM Update: Week Ending 7/15/15

Sweet Corn

Click to View

Click to View


There is still very little European corn borer (ECB) adult activity at this time. Few individuals have been captured throughout NJ this past week (see ECB map). ECB infestations are absent from sweet corn plantings. We would expect to see signs of the second flight within the next week or so.

As always, consider treating when the number of infested plants in a 50 plant sample exceeds 12%. Any planting remaining at or above threshold as it proceeds to full tassel should be treated, as this is the last stage at which ECB larvae will be exposed and vulnerable to insecticidal sprays.

See the 2015 Commercial Vegetable Recommendations Guide for insecticide choices.
[Read more…]

Filed Under: Vegetable Crops
July 12, 2015

Intro to Organic Vegetable Production Field Day from Penn State, Aug 6, 2015

Location
Good Work Farm
4791 Rock Road
Zionsville, PA 18092

Date: August 6, 2015 from 4 to 7 pm
4:00 PM Farm Tour
4:45 PM Scouting and Identification Exercise
5:45 PM Disease Management and Discussion
6:30 PM Dinner

Registration
This field day is part of the Introduction to Organic Vegetable Production series. No pre-registration is required. Walk-in to join us. $10 walk-in fee covers dinner and materials.

Penn State Extension is offering An Introduction to Organic Vegetable Production Field Day focusing on plant disease scouting, identification, and management on the evening of August 6th at Good Work Farm in Zionsville, PA located about an hour north of Philadelphia. For more information see Organic Vegetable Production Field Day.

Filed Under: Organic Production, Vegetable Crops
July 12, 2015

Of Note from UDel: Late blight Look-a-like in Potato & Late blight Lineages

Two important topics were addressed by Dr. Nathan Kleczewski, Extension Specialist in Plant Pathology at the University of Delaware this week in the Weekly Crop Update.

We have on occasion detected Phytophthora nicotiana on potato in southern New Jersey when wet weather conditions have been prolonged. The good news is that P. nicotiana, although it looks like Late blight, does not show anywhere near the destructiveness that comes with Late blight.

Last week Late blight, Phytophthora infestans, (US23) was found in tomato in Northern New Jersey. US23 has been the predominant genotype found throughout the region during the past few years. Why is knowing the genotype so important? US23 will infect both tomato and potato and has been shown be sensitive or to have intermediate-sensitivity to mefenoxam (i.e., Ridomil Gold). Knowing that US23 is present in New Jersey should put all tomato and potato growers on high alert and everyone should be scouting on a regular basis. All tomato and potato growers should initiate standard protectant fungicide programs if they already haven’t done so.

Filed Under: Vegetable Crops Tagged With: ,