University of Georgia
Extension Peanut Agronomist
Weather conditions in 2009 were ideal for diseases to develop and spread. No one knows from year to year how favorable conditions will be for disease, but in the Southeast, we know for sure disease will be present. A successful disease management program involves three key practices. No. 1 is implementing a good rotation sequence. Planting peanut once every three years or longer in the same field is the best control strategy to reduce disease inoculum. The second key is selecting a disease-resistant cultivar. In the Southeast, there are several outstanding cultivars with good-to-excellent resistance of many disease problems. The third key is starting and staying on time with fungicide applications. If you were unable to implement the first two keys for 2010, then following the third key is extremely crucial.
Texas A&M University
June is the time to control weeds that escaped preemergence and early season weed control programs. The last thing you want is a mat of grass or pigweed with a stalk the size of a baseball bat to have to deal with at harvest. Keys to controlling these weeds are weed identification, weed size, herbicide selection, additives required and other label recommendations. This information is important in making postemergence weed control programs work best. The label should be closely read and observed before making a herbicide application.
Also, consider drift into neighboring susceptible crops. Reducing spray pressure, spraying with drift-control type or larger nozzles, lowering boom height and spraying when wind conditions are not favorable for drift problems are just a few of the things to do to minimize potential drift.
North Carolina State University
June to early July is the time to deal with weed escapes. Timeliness is essential as small weeds are easier to control than big ones, and using the correct adjuvant and spray volume is also important. For example, more water is better with PPO inhibitors.
For V-C growers, consider using the southern corn rootworm advisory for insecticide application decisions.
For fungicides, look closely at reproductive growth and consider Extension recommendations for your region in deciding when to initiate sprays. As always, there will be questions about tankmixes, as some products are compatible and others reduce efficacy. Overcome compatibility issues by being timely in getting small weeds and early intervention for disease. Good, healthy vines allow peanuts to mature and stay on for digging and harvest.
Many of you are going back to your fields for the first time since planting. Here are a few important factors that need to be done to help the crop to a good start.
First, make sure that you have established a good stand of at least four plants per foot of row.
Second, target early season weeds while they are small and easy to control.
Third, begin your fungicide program at 30 to 40 days after planting following the AU Leaf Spot Advisory, and do not forget to add boron to prevent hollow-heart in the first couple of fungicide sprays.
Finally, pull a pegging zone calcium sample about two to three inches deep in the row to ensure adequate calcium levels for pod fill.