- Sweet Corn
- Peppers
- Tomatoes
- Pumpkins
- Cole Crops [Read more…]
Archives for September 2012
Vegetable IPM Report September 26, 2012
Late Season Yellow-fleshed Peaches
-Jerome L. Frecon
In recent years late season peaches have not been as popular because food retailers and consumers seem to feel peach season ends at Labor Day. This was not quite true in 2012 with many of our most popular late season varieties waning in supply after Labor Day.
Peach movement was great throughout the summer of 2012 as most varieties were maturing ten days to 1 week early in the August varieties. This early season maturity and good movement seemed to occur throughout the eastern US. In southern New Jersey this resulted in a few changes with many normally late maturing peaches. [Read more…]
Fall Can Be a Good Opportunity for Getting a Jump on Next Year’s Weed Problems
by Mark VanGessel, Extension Weed Specialist; mjv@udel.edu
Fall herbicide treatments have a nice fit for many situations such as small grain weed control, assisting with cover crop management, and reducing the severity of weed infestations for no till corn or soybeans.
Let’s look at each of these situations. Treating small grain fields with a late fall herbicide application has worked well in our trials. As discussed in earlier newsletters there are no herbicides labeled for applications at planting (a preemergence application). As a result we have lots of winter annuals that emerge with or shortly after the crop. Waiting until spring to control these weeds often results in poor control because the weeds are large, and often stressed from the winter weather. On the other hand, an application in the late fall is made while the weeds are relatively small and actively growing. Remember these weeds are winter annual and will continue to grow after a few hard frosts, and the soil temperatures allow for significant growth through the month of November. If there is a lot of spring emergence, then those weeds can be controlled with a herbicide applied in combination with spring nitrogen applications.
Source: Read more from Weekly Crop Update
Harvest Aids for Soybeans
By WCU Editor
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu
A few herbicides are labeled as harvest aids for soybeans. Glyphosate and paraquat will have the broadest spectrum of control, with paraquat having quicker activity on the weeds. Aim is also labeled, but it has a very narrow spectrum of control. Be sure to read the label of the product you are considering for all the precautions and restrictions. Application of these products is after the pods begin to lose their green color. Applications made this late in the season means they will have little to no impact on reducing weed seed production.
Source: Weekly Crop Update
Considerations for Small Grains Weed Control
By WCU Editor
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu
For no-till fields, a non-selective herbicide needs to be used prior to planting. If grasses are present glyphosate is a better choice than paraquat. Fields worked with a vertical tillage implement for residue management still need a non-selective herbicide. These implements are not weed control tools.
There are few effective herbicides labeled for preemergence applications. Sharpen is labeled but we have limited data in the region to recommend it for either residual weed control or crop safety. Valor can be used at 1 to 2 oz with the burndown application, but there must be a 30 day period between application and planting wheat due to concerns with crop safety.
A few products can be used shortly after the crop has emerged. Axiom and Prowl H2O can be used at crop emergence (Axiom at the spike stage and Prowl H2O at 1 leaf stage); however they need to be tankmixed with other herbicides or followed by postemergence herbicides to provide a broad spectrum of control.
Products that provide postemergence control include: Harmony, Harmony Extra, Starane Ultra, Osprey, PowerFlex, Axial XL, 2,4-D, or dicamba. Others labeled with a limited fit include metribuzin, Finesse, and Maverick.
Source: Weekly Crop Update
Gray Leaf Spot Disease
By Jim Murphy
Perennial ryegrass leaf blade damaged by gray leaf spot.
Many are planting new turf areas or re-seeding damaged areas using perennial ryegrass. Perennial ryegrass has the advantage of a fast establishment rate; a full turf cover can develop within 4 weeks.
However, you need to be aware that gray leaf spot disease…