April 24, 2018

Controlling Spring Diseases in Asparagus

Asparagus season is just around the corner and now is a good time to review important diseases.

Wet soil conditions are ideal for Phytophthora and Pythium development. To help reduce potential losses, especially in fields with low spots or fields that are poorly drained soils, or more importantly, in fields with a history of either disease apply Ridomil Gold 4SL (mefenoxam, 4) at 1.0 pt/A, or Ultra Flourish 2E/A (mefenoxam, 4) at 2.0 pt/A, or MetaStar 2E (metalaxyl, 4) at 2.0 qt/A over beds just before first harvest. For new plantings, apply the same after planting or after crown covering. Do not apply Ridomil or MetaStar one day prior to harvest or illegal residues may result. [Read more…]

Filed Under: Vegetable Crops Tagged With:
July 6, 2017

Controlling important fungal diseases in Asparagus during the summer.

Asparagus growers should consider scouting their fields during the summer months for  foliar disease development. Important pathogens that growers need to scout for on a regular basis include Purple spot, Cercospora, and Rust. [Read more…]

Filed Under: Vegetable Crops Tagged With: ,
April 27, 2017

Controlling Purple Spot in Asparagus

Like clockwork, purple spot has appeared in some asparagus plantings during mid- to late-April for the past 3 years. Purple spot, caused the soil-borne fungus, Stemphylium vesicarium, can cause problems during cool, wet spring weather (much like we have had over the past week or so). Symptoms, just like its name, include numerous, sunken oval-shaped spots on spears during the harvest season and more importantly on ferns and stalks during the summer months as long as conditions are ideal for its development. Often, purple spot will disappear as quickly as in appears on spears during the spring production season depending on the local weather conditions. As soon as the weather becomes dry and warm (as it appears for the weekend), expect purple spot to disappear. [Read more…]

Filed Under: Organic Production, Vegetable Crops Tagged With: ,
April 16, 2017

Vegetable Disease Update – 4/17/17

Vegetable Disease Notes:

  • Powdery mildew has been reported in a number of tomato greenhouse operations. For control of powdery mildew and other important diseases in greenhouses and high tunnels please see Table E14 on pages E52-E54 of 2016-2017 Commercial Vegetable Production Recommendations Guide.
  • A new article on the importance of testing for Dickeya dianthicola in potato seed can be found here.

[Read more…]

Filed Under: Vegetable Crops Tagged With: , , , ,
April 10, 2017

Vegetable Disease Update – 4/10/17

Asparagus

Phytophthora crown and spear rot – In fields with low spots (poorly drained soils) or fields with a history of crown and/or spear rot apply Ridomil Gold 4SL (mefenoxam, 4) at 1.0 pt/A, or Ultra Flourish 2E/A (mefenoxam, 4) at 2.0 pt/A, or MetaStar 2E (metalaxyl, 4) at 2.0 qt/A over beds just before 1st harvest. For new plantings, apply the same after planting or after crown covering. Do not apply Ridomil or MetaStar one day prior to harvest or illegal residues may result. For more information please see the 2016-2017 Mid-Atlantic Commercial Vegetable Production Recommendations Guide. [Read more…]

Filed Under: Vegetable Crops Tagged With: , , , ,
April 10, 2017

Controlling Spring Diseases in Asparagus

Asparagus season is just around the corner and now is a good time to review important diseases.

Wet soil conditions are ideal for Phytophthora and Pythium development. To help reduce potential losses, especially in fields with low spots or fields that are poorly drained soils, or more importantly, in fields with a history of either disease apply Ridomil Gold 4SL (mefenoxam, 4) at 1.0 pt/A, or Ultra Flourish 2E/A (mefenoxam, 4) at 2.0 pt/A, or MetaStar 2E (metalaxyl, 4) at 2.0 qt/A over beds just before first harvest. For new plantings, apply the same after planting or after crown covering. Do not apply Ridomil or MetaStar one day prior to harvest or illegal residues may result. [Read more…]

Filed Under: Vegetable Crops Tagged With: