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Growers make many decisions every year about what chemicals to use for pest prevention and/or control. These are very important and, often, expensive decisions to make. Unfortunately, sometimes we get less than desirable results from chemical applications.
Many factors influence the efficacy of chemicals. One simple factor we often overlook is coverage. We assume we are getting adequate coverage when we really are not. It is importan[...]
In general, vegetable insect pests have chewing or piercing-sucking mouthparts. Caterpillars, beetles, and grasshoppers are good examples of insect pests with c[...]
A few cucurbit diseases were found in a few commercial fields in south Alabama along with the cucurbit downy mildew sentinel plots in Fairhope and Brewton. Gummy stem blight was fairly common on watermelon; downy mildew was found on cucumbers and butternut squash, and powdery mildew was observed mainly on yellow squash.
2018 has been a wet year so far for most of us. The excess moisture is allowing for an abundance of mushrooms to emerge. At the Auburn University Plant Diagnostic Lab, we have received many mushroom identification requests, specifically for Chanterelles. We cannot identify mushrooms for human consumption at the diagnostic lab, especially based on pictures. There are look-a-like mushrooms that can be difficult to[...]
It is time to scout crops again and prevent insect outbreaks with timely intervention! Excessive rain in much of May have slowed moth activity, but we have detected a sudden increase in armyworm ac[...]
There have been many recent calls about squash bugs (Anasa tristis) and how to get rid of them in farms and gardens. We wish for a magical solution to the squash bug probl[...]
Pierce's Disease (PD) is a serious threat to the cultivation of grapes in the United States, especially in the warmer southern regions. Recently the UC Davis grape breeding program has developed new European ([...]
Bacterial wilt has been detected in five samples submitted to the Plant Diagnostic Lab in the past week. This includes samples collected from both commercial fields as well as backyard gardens. Bacterial wilt is caused by a soil-borne bacterium (Ralstonia solanacearum). A characteristic of this disease, which sets it apart from other wilt diseases, is that plants wilt and die rapidly without the presence of yellowing o[...]
I receive many questions every year and teach many classes on plant propagation. Many different aspects of plant propagation can be fascinating, but I probably receive more questions on grafting than any other propagation method. Why would someone graft rather than propagate with other common methods such as division, seeds, cuttings, or layering? The main reason is to propagate plants that can not be readily maintained with those other me[...]
During the current season some strawberry growers have seen production of leaves and other vegetative organs from fruit tissue around achenes of strawberry fruit. This abnormal development of floral parts into leafy structures[...]
Leaf tissue testing (also called plant analysis) is the best option when deciding if and how much more nitrogen or other nutritional elements needed to meet expected yields. Leaf tissue testing can help identify any "hidden hunger" that might exist in the crop. A "hidden hunger" develops when a crop needs more of a given nutrient but has shown no visual deficiency symptoms.[...]
Female ambrosia beetle (Coleoptera: Curculoinidae, Scolytinae) may bore holes in peach trees usually at the site of lenticels. As an ambrosia beetle tunnels into the tree, she deposits fungal spores. [...]
If you were not able to apply all of the dormant sprays to control San Jose scale in your peach orchard, there are options in the form of in-season sprays.
Dr. Brett Blaauw entomologist with Georgia Extension recommends that you use Esteem (6 oz. per acre) or Centaur (34.5 oz. per acre) if active crawlers are found in the orchard. If you cannot find active crawlers, this may indicate that the i[...]
Inspection Report Week of May 6, 2018 - Florida wax scale is right on schedule. May 18 and August 23 have always stuck in my mind as the ideal times to spray, or at least look [...]
Insect pests can cause major crop loss or contamination if not managed timely. We are generally very careful about choosing the right insecticide, but we forget to check the condition of the spray equipment that leads to insect control failure even with the best of pro[...]
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