Archives for July 2013

Fruit IPM Report: Week Ending 8/3/13

Fruit IPM Report 8-3-13 – Click to View | Download | Print

In this report:

  • Brown Marmorated Stink Bug
  • Peach
  • Apple
  • Grape
  • Scouting Calendar
  • Blueberry
  • Trap Counts

Blueberry Pest in Detail: Leafminers

Teepee shelters containing Blueberry Leafminer

Teepee shelters containing Blueberry Leafminer.
Only 1 larva is found per leaf.

The blueberry leafminer is generally not considered an economic pest problem mainly because larvae experience high levels of parasitism in most blueberry fields. Larval parasitism can reach levels up to 80%. Use of broad-spectrum insecticides can have a severe effect on the natural enemy populations of the leafminer.

Because of potential contamination, the blueberry leafminer might be a problem if you are processing more blueberries than usual. Blueberry leafminer larvae may become a contaminant, especially in machine-harvested fruit, as larvae drop from the bushes together with the harvested fruit. Under this special circumstance, treatment may be justified. Otherwise, we do not see the need to treat for this insect. [Read more…]

Veg IPM Update: Week Ending 7/31/13

Vegetable IPM Report 7-31-13 – Click to View | Download | Print

Current Week’s Pest Maps – Available Maps for the week are highlighted

Potato Disease Forecasting Report 7-30-13

Potato Disease Forecasting Report 7-30-13 – Click to Download

We will be tracking DSVs for Late blight development and calculating P-days for initiating the first early blight fungicide application.

The first late blight fungicide application is recommended once 18 DSVs accumulate from green row. Green row typically occurs around the first week in May in southern New Jersey. An early season application of a protectant fungicide such as mancozeb (Dithane, Manzate, Penncozeb) or Bravo (chlorothalonil) as soon the field is accessible is suggested. Please be vigilant and keep a look out for suspect late blight infections on young plants. No late blight has been reported in our region to date.

Remember the threshold for P-days is 300!  Once 300 P-days is reached for your location early blight fungicide applications should be initiated. Growers who are interested in using this model should chose the location above that is closest in proximity to their farming operation and should regularly check the Cornell NEWA website (http://newa.cornell.edu/) where this information is compiled from. Click on Pests Forecasts from the menu, select your weather station, and click on tomato diseases, set accumulation start date and a table of daily and total DSVs will be generated.

Tomato Disease Forecasting Report 7-30-13

7-30-13 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.

ACGA 2013 Summer Field Day

American Cranberry Growers Association 2013 Summer Field Day
Date: Thursday, August 15

Location: Rutgers P.E. Marucci Center for Blueberry & Cranberry Research & Extension, Chatsworth, NJ

Parking will be available at the Center’s shop (across cranberry bogs).
Transportation for tours will be provided at the Center.

Agenda
[Read more…]