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Tag: vegetables

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Ipm for high tunnels and greenhouse sites going into Spring, based on a good article from University of Kentucky Extension:

  1. Start clean and stay clean.
  2. Sanitation and weed control in and around structures, repair screening for insect pests.
  3. Regular monitoring and visual inspection of plants and sticky cards. Know crop history and pests encountered, and keep records
  4. Detect pest problems early, while at manageable levels.  Identify pests and for aphids and whiteflies identify them to species.  County Extension offices and Plant Clinics can help with this.
  5. Release beneficial species (natural enemies and pollinators), from reputable suppliers. Monitor populations because beneficial species require management.

NFG 2/19/2019

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Powerpoint (in pdf form) talk by Nancy Gregory in the Processing Vegetables Session of Delaware Ag Week, January 10, 2018. The pictures may be very helpful : Gregory-P-capsici-Ag-Week-Veg-January-2018

Phytophthora capsici on snap bean

If you have any questions, please contact ngregory@udel.edu
1/16/2018 NFG
 

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Chinese broccoli, Brassica oleraceae var alboglabra was diagnosed in the UD Plant Diagnostic Clinic  this week with clubroot, a disease caused by an oomycete fungus- like pathogen. Plasmodiophora can be found persisting in the soil and may be moved along with transplants. I have never seen this disease in the field. It affects all Brassica species, and the resting spores can remain in soil for 10 years or more. The swellings are the result of hyperplasia and hypertrophy. The plasmodia are in the plant cells in the swellings. Swimming zoospores can result in spread in wet soils. It is not a USDA regulated pathogen, but can be very problematic in agricultural soils where cabbage, broccoli, or kale is grown.
5/25/17 NFG

Pumpkins are one of our favorite fall decorations, food sources, and animal feed sources in Delaware.
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Pumpkins are one of our favorite fall decorations, food sources, and animal feed sources inpumpkin-fruit-rot Delaware. Agro-tourism, including fall hayrides, pumpkin picking, and other activities are strong sources of farm income. Fruit rots caused by fungi and bacteria can diminish profits of farmers, especially in seasons with wet weather, high humidity and fluctuating temperatures.  Fruit rots also disappoint consumers who expect a purchased pumpkin to last a long time. Micro organisms can cause problems during storage post-harvest.  Avoid wounding pumpkins at harvest, during transit, and keep in a cool location. Wounds allow micro organisms to enter.
The fungus-like organism Phytophthora capsici has a very wide host range, including cucurbits such as pumpkin, watermelon, squash, and tomatoes, beans, and other vegetables. If a pumpkin develops a white powdery soft rot such as in the picture, it may be due to Phytophthora. Discard it in the trash, do not compost in gardens or use the seeds to start plants for next season. Phytophthora is not harmful to humans or animals, but secondary fungi can move in. The black specks in the picture show some secondary fungi that have started to grow on the affected area.
N Gregory 10/21/2016