Copper resistance has been detected in bacterial leaf spot of tomato and pepper and in Pseudomonas chicorii, the causal agent of bacterial leaf spot in basil, in New Jersey. While not surprising, copper resistance has been known to develop for decades now; however, this is the first time it has been confirmed in vegetable crops in New Jersey. [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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May 29, 2021 Andy Wyenandt
Survey continuing for bacterial leaf spot and copper resistance in 2021 growing season
May 28, 2021 Andy Wyenandt
2020/2021 Mid-Atlantic Commercial Vegetable Production Recommendations available on-line
The 2020/2021 Mid-Atlantic Commercial Vegetable Production Recommendations guide is still available for FREE on-line. The complete 2020/2021 Vegetable Production Recommendations guide or specific sections can be downloaded depending on your production needs.
May 27, 2021 Andy Wyenandt
Controlling Cercospora leaf spot in beet
Cercospora leaf spot (CLS), caused by Cercospora beticola, is an important and emerging disease in beet and swiss chard production in New Jersey. Efforts to control this disease has become more difficult in the past few years in some areas of southern New Jersey. [Read more…]
May 26, 2021 Kris Holmstrom and Joe Ingerson-Mahar
Vegetable IPM Update 5/26/21
Sweet Corn
European corn borer (ECB) moths are now being captured in parts of the state. As yet, numbers are low, and the next 7-10 days will likely
tell whether this flight will be of any significant size. Current “hot spots” are around Salem County and southern Hunterdon into Mercer and Ocean counties (see map at right). Whorl corn is the primary target for egg laying, but as yet, scouts have reported no signs of feeding injury. We expect to encounter feeding over the next week. .
Look for the characteristic “shot-hole” type of feeding (photo below at right) and consider treating when infested plants exceed 12% in a 50 plant sample. As plantings proceed to the pre-tassel stage, ECB larvae may be found in emerging tassels (see photo at left). It is a good idea to treat individual plantings as they move into the full tassel/first silk stage one time. This eliminates any ECB larvae that have emerged with the tassels as they begin to move down the stalk to re-enter near developing ears.
Useful insecticides for this particular application include synthetic 
pyrethroids (IRAC Grp 3), spinosyns (including OMRI approved Entrust) IRAC Grp 5), and diamides such as Coragen or Vantacor (IRAC Grp 28) or materials such as Besiege which include the active ingredient in Coragen. Synthetic pyrethroids alone should NOT be used for corn earworm (CEW) protection on silking corn. Control with these materials is very inconsistent.
The highest nightly trap catches of ECB for the week ending 5/26/21 are as follows:
| Sergeantsville 3 | Clinton 1 | New Egypt 1 |
| Allentown 1 | Crosswicks 1 | Pedricktown 1 |
| Bellemeade 1 | Jones Island 1 | Pennington 1 |
| Centerton 1 | Lawrenceville 1 | Princeton 1 |
May 26, 2021 Meredith Melendez
FSMA Produce Safety Rule Inspections Taking Place on all Covered Farms
Are you a produce farm who has not yet had a FSMA Produce Safety Rule inspection? Have you received communication from the NJ Department of Agriculture about the Produce Safety Rule? Smaller size produce operations are currently being inspected by the NJDA for FSMA PSR compliance. If you have not yet had an inspection you may be subject to one this season. Here is what you need to know:
If you grow and sell over $25,000 in produce annually you may be subject to the FSMA Produce Safety Rule. The NJDA will contact your farm to ask several questions to understand if the rule pertains to you. What crops do you grow? How much in produce sales do you make on an average year? What percentage of your sales are made direct to consumer (farm stand, farmers market, CSA, direct to an individual grocery store, direct to an individual restaurant)? What are your total food sales (including any food for human and/or animal consumption including hay, grain, baked goods, meat, milk, honey, chewing gum, etc.) for an average year? You may have previously answered these questions via a survey that was mailed to you, or over the phone with NJDA staff.
The NJDA is currently scheduling inspections with farms across the state of all sizes. If you receive a phone call or email from the NJDA about a Produce Safety Inspection date, do not ignore the communication. The inspection will take place and warning letters can be sent to farms who are not in compliance with the rule.
Have questions about if your farm is exempt or qualified exempt from the rule? Remember that qualified exempt farms need to prove their exemption status, this can be done by using the qualified exempt review template on page 5 of the recordkeeping guidance from the Produce Safety Alliance.
Farms that need to comply with the rule are required to attend FDA approved training. The next training in NJ will be held online on September 15th and 16th. Other online trainings are available from other states, visit the Produce Safety Alliance website for more details. The approved training covers the Produce Safety Rule requirements and ways of complying with them.
May 26, 2021 Andy Wyenandt
Diagnosing Verticillium Wilt in Eggplant
Verticillium wilt is a common soil-borne fungal pathogen that once it has infested soil can remain for a very long time. Verticillium wilt is caused by either Verticillium albo-atrium or Verticillium dahlia and has a wide host range (over 200 plant species). Both pathogens can survive (overwinter) as microsclerotia in the soil. Verticillium wilt prefers cooler weather and drier soils and can be more severe in neutral to alkaline soils. Solanaceous weeds such as Nightshade may harbor the pathogen. [Read more…]
