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I assume most of you know by now that Torac is registered for a variety of insect pests on a variety of crops. Torac is a new mode of action for most insects (it is the same as some acaricides) and is relatively broad spectrum. There are a few specific areas where I think it…
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We are currently detecting a variety of whitefly-vectored viral diseases in vegetable crops. The two of greatest concern are cucurbit leaf crumple virus and tomato yellow leaf curl virus. Both have been detected in multiple counties in southern Georgia but are generally at low levels to date; unfortunately, this could change rapidly. Current levels of…
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Silverleaf whitefly populations have increased in many areas in the last few weeks and will likely continue to increase as we stay above average temperatures. When we start to cool off at night, the population increases should slow down. We have been fortunate that we have not seen population explosions like we had last year.…
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We have recently confirmed Cucurbit leaf crumple virus (CuLCrV) on yellow squash at UGA, Tifton, GA. The symptoms include crumpling, curling, yellowing and chlorosis of leaves. Infected plants appear stunted with distorted growth. Disease symptoms can be severe, especially in Cucurbita spp. (e.g., various types of squash), and may result in yield losses. The virus spreads by whiteflies in a persistent manner. Current projections indicate low disease incidence and…
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Watermelon vine crash or decline has been reported from number of fields from different counties in southwest GA. Based on the county extension agents’ reports and also from the personal observations made by extension specialists (B. Dutta and T. Coolong), symptoms of vine decline are mostly associated with low-wet spots in the fields. However, we…
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Powdery mildew is a common disease of cucurbits under field and greenhouse conditions in most areas of the United States. Although all cucurbits are susceptible, symptoms are less common on cucumber and melon because many commercial cultivars have resistance. This disease can be a major production problem if not manage timely. Podosphaera xanthii and Erysiphe cichoracearum are the two…
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Please see the attached extension publication on initial steps for detecting plant-parasitic nematode problems in vegetables (by Dr. Hajihassani) To access, please click on the link: https://siteextension.uga.edu/publications/detail.html?number=C1126
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Onion fields infested with root knot nematodes (RKN) were found in the Vidalia area. As can be seen in the picture (Photo: Aubrey Shirley), typical symptoms of RKN on above-ground parts of plants can involve patchy stunting, poor growth and yellowing of leaves. These symptoms are rather similar to nutrient deficiency. Premature wilting of plants can be seen…
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The nematology lab at UGA-Tifton reports another incidence of stubby root nematode (SRN) on onion in Tattnall county. The field was highly infested with the SRN and onion plants were severely damaged as can be seen in the figure (Photo: Chris Tyson). The area with severe yellowing and stunting of plants is where the grower…