Archives for May 2013

May 10, 2013

Morningglory Control in Soybeans

By Mark VanGessel, Extension Weed Specialist; mjv@udel.edu

I always get questions on what to use to control mornningglory in soybeans at about the time to spray postemergence. Morningglory control starts at planting with a preemergence herbicide with broadleaf products such as Canopy, Valor XLT, Envive, Fierce, Prefix, Sonic or the Authority products. These will need to be followed up with a postemergence application in a timely manner for effective control (to morningglory no larger than 3”). The preemergence herbicide slows the growth of morningglory plants and seems to “set them up” for better overall control. This has been more consistent for morningglory control than any tankmixtures or glyphosate additives that I have evaluated.

Source: Read More from Weekly Crop Update

Filed Under: Commercial Ag Updates
May 10, 2013

Potato Disease Forecasting Report 5-10-13

Potato Report 5-10-13 – Click to Download

Welcome to the new potato report for 2013! As always, we will be tracking DSVs for Late blight development and calculating P-days for initiating the first early blight fungicide application. Remember the threshold for P-days is 300! Once 300 P-days is reached for your location early blight fungicide applications should be initiated.

Filed Under: Disease Forecasting
May 10, 2013

FDA Food Safety Q&A: Growing, Harvesting, Packing & Holding Produce

The FDA Proposed Produce Food Safety Rule Q & A conference call, coordinated by the Produce Safety Alliance, discussed the growing, harvesting, packing and holding of produce.

Here are the questions and answers from that call:

1. Will growers be expected to use food grade containers? [Read more…]

Filed Under: Food Safety
May 10, 2013

Tomato Disease Forecasting Report 5-10-13

5-10-13 Tomato Report – Click to Download

Disease severity values (DSVs) for early blight, septoria leaf spot, and tomato anthracnose development are determined daily based on leaf wetness (due to rainfall, dew) and air temperature.

On a daily basis DSV values can range from 0 to 4 where 0 = no chance for disease development to 4 = high chance for disease development.
DSVs are accumulated during the production season.

Fungicide applications are based on an individually determined DSV threshold. The first fungicide application for the control of these three diseases is not warranted until 35 DSVs have accumulated from your transplanting date. After that, growers can base fungicide applications on different DSV thresholds.

Filed Under: Disease Forecasting
May 10, 2013

Understanding the Strobilurin Fungicides (FRAC code 11)

The strobilurin, or QoI fungicides (FRAC code 11) are extremely useful in controlling a broad spectrum of common vegetable pathogens. You may know some of strobilurins as azoxystrobin (Quadris), trifloxystrobin (Flint), pyraclostrobin (Cabrio), or Pristine (pyraclostrobin + boscalid, 11 + 7). [Read more…]

Filed Under: Vegetable Crops Tagged With: ,
May 10, 2013

NEWA Disease and Insect Forecasting System

Since 2011 the vegetable working group has teamed up with Cornell University’s NEWA to bring tomato and potato late blight and early blight forecasting to vegetable growers throughout New Jersey. Over 30 weather stations from Sussex to Cape May County now offer disease as well as insect forecasting services for 19 specific pests. [Read more…]

Filed Under: Vegetable Crops