Andy Wyenandt

This is an archive of Dr. Wyenandt's posts on the Plant and Pest Advisory.

June 22, 2021

Cucurbit Downy Mildew Alert – Cantaloupe – 6/22/21

Cucurbit downy mildew has been confirmed on cantaloupe in southern New Jersey. This is the first report of CDM on cantaloupe and the second this growing season. CDM was confirmed on cucumber on 6/16/21. All cucumber and cantaloupe growers should scout on a daily basis and initiate a preventative fungicide program. CDM has also been confirmed on cucumber in Ontario, Canada this week. Remember, some CDM isolates fall into Clade I which predominately infect watermelon, pumpkin, and squash, where other CDM isolates in Clade II predominately infect cucumber and cantaloupe.

For more information on CDM, the clades, and CDM control please click here.

Filed Under: Vegetable Crops Tagged With:
June 18, 2021

Cucurbit Downy Mildew Alert – Cucumber – 6/16/21

Cucurbit downy mildew has been confirmed on cucumber in southern New Jersey. This is the first report of CDM in the state and region this growing season. All cucumber and cantaloupe growers should scout on a daily basis and initiate a preventative fungicide program. CDM has also been confirmed on cucumber in Ontario, Canada this week. Remember, some CDM isolates fall into Clade I which predominately infect watermelon, pumpkin, and squash, where other CDM isolates in Clade II predominately infect cucumber and cantaloupe.

For more information on CDM, the clades, and CDM control please click here.

Filed Under: Vegetable Crops Tagged With:
June 18, 2021

Important resources for pepper disease control

Pepper production is in full swing in New Jersey and the mid-Atlantic region. Below are links to useful resources for the identification and management of important pepper diseases.

Early-season Phytophthora and Pythium control

Preparing for pepper anthracnose

Phytophthora-tolerant and -resistant bell pepper variety trial reports

Survey continuing for bacterial leaf spot and copper resistance in 2021 growing season

Filed Under: Vegetable Crops Tagged With: , ,
June 16, 2021

Important resources for cucurbit disease control

The cucurbit growing season is well under way in New Jersey and the rest of the mid-Atlantic region. Below are links to useful resources for the identification and management of important cucurbit diseases.

Cucurbit Powdery and Downy Mildew: A Tale of Two Pathogens

The downy mildew forecasting website

Preparing for cucurbit downy mildew

Preparing for cucurbit powdery mildew

Preparing for Anthracnose and Alternaria Leaf Blights in Cucurbit Crops

Recognizing and controlling Angular leaf spot in cucurbits

Recognizing and controlling Plectosporium blight in cucurbits

Controlling Phytophthora and Rhizoctonia root rots

Destroying cucurbit plantings after harvest

 

Filed Under: Disease Forecasting, Vegetable Crops Tagged With: , ,
June 16, 2021

Cucurbit Downy Mildew Alert – 6/16/21

Cucurbit downy mildew has been confirmed on cucumber in southern New Jersey. This is the first report of CDM in the state and region this growing season. All cucumber and cantaloupe growers should scout on a daily basis and initiate a preventative fungicide program. Remember, some CDM isolates fall into Clade I which predominately infect watermelon, pumpkin, and squash, where other CDM isolates in Clade II predominately infect cucumber and cantaloupe.

For more information on CDM, the clades, and CDM control please click here.

Filed Under: Vegetable Crops Tagged With:
June 14, 2021

Vegetable Disease Update – 6/14/21

  • Cucurbit downy mildew has been reported as far north as South Carolina on cucumber and cantaloupe in Georgia. To track the progress of CDM please visit the CDM forecasting website.
  • No reports of Late blight in the region. To track the progress of Late blight in the US please click here.
  • Basil downy mildew has been reported from multiple locations in southern New Jersey. All basil growers are encouraged to scout their plantings on a daily basis. For more information on controlling BDM please click here. To follow the progress of BDM in the US please click here.
  • Rhizoctonia and Pythium root rot have been reported in pepper. For a review of identifying and controlling root rots please click here.
  • With the on and off again heavy rains we have been getting, along with warmer weather, all growers should consider applying at-transplanting fungicides for root rot control. Please click here to see these articles.
  • The 2020/2021 Commercial Vegetable Production Recommendations Guide is available for free online! With many county offices running reduced hours or being closed this is the easiest way to obtain the newest recommendations.
  • For a quick review on managing fungicide resistance development using tank mixes and fungicide rotations, and information on FRAC group 4, FRAC group 7, and FRAC group 3 and FRAC group 11 fungicides please click on hyperlinks.
Filed Under: Vegetable Crops