— Written By David Jordanen Español / em Português
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Rains this week have brought some reprieve and needed water to areas in the state with some receiving between 1 and 2″. Possible chance for additional rain through the week ahead, while conditions remain favorable for being on guard against disease development and insects.
White Mold
The first set of pictures, shared by Jonathan Croft, show a field where white mold mycelia and small sclerotia could be found in multiple spots in the field. Several effective soil fungicide applications had been made in the field this year, though with limited if any help from rain to be washed in. It is a very helpful when we can get a soil fungicide washed in to improve its control of diseases like white mold. Many times, the benefits we get from effective fungicide programs is to limit the spread of the disease rather than blotting out all traces of the opposition. When high white mold pressure goes uncontrolled, long sections of rows can be affected as it spreads across. Effective management greatly contains this spread, though it can still show up in the presence of a strong program.
Foliar Injury
The second set of pictures is from a different field compared to the one shared in a previous update where peanut leaves were showing injury following an application of chlorothalonil and tebuconzale about 12 days ago. While generally unsightly, this amount of injury should not affect overall crop health or yield. In past years, when similar injury symptoms were associated with application of prothioconazole + tebuconzaole products, the injury was reported to have been caused by one of the inactive ingredients added to the overall formulated product. If such an inactive ingredient is similarly contributing to the symptoms observed this year remains to be determined.
Velvetbean Caterpillar
The third picture page is of a velvetbean caterpillar moth. Moths have been reported from fields in the central to south-southwestern areas of the state. For these areas and others where VBC have been seen or are common, including the insect growth regulator Dimilin at 2 fl oz/A in with fungicides in and around 75 and 90 DAP provides inexpensive preventative insurance to interrupt the development/molting of the larvae (28 day PHI). If worms like VBC can be prevented from reaching high and damaging levels, we may reduce the need to later come in with a broad spectrum or more expensive insecticide treatment.
Field Day
On September 5, we will be hosting the Edisto REC Peanut, Cotton, Vegetable and Fruit Field Day in Blackville, SC. A program flyer is attached. Hope to see you there!
