BLACKVILLE – Due to hot, dry weather there are problems for the production of South Carolina groundnuts and Dan Anco, Clemson's peanut specialist, is warning farmers to look out for many diseases that may affect results.
The disease is only Aspergillus crown rot.
“This disease shows that it is a black sooty spore on the dead crown of plants,” said Anco. “It is hard to treat when it is seen in a park. The best thing to do is to add quality treated seeds. ”
Products in teams such as Abound (azoxystrobin) can help, but when dead plants are visible, it is too late to add in-furrow product. The warm and dry conditions that encourage the decay of Aspergillus crown also promote the appearance of smaller cornstalk fruits, which can create openings where Aspergillus can enter plants.
Anco also warns of underground diseases, such as a white model. Damage to white molds may not be seen until ground peas are inverted, or pulled out of the ground and turned, so that they can dry. By using the fungicidal tebuconazole to apply between 40 and 45 days, it will help to prevent the growth of white metals.
A spot spot spot and leaf spot were found late in some places but are not under control.
“The earlier dry weather gave us some programs to start fungicide programs perhaps a little later,” said Anco. “We will keep protection and ensure that we do not come back to manageable things as we enter the season.” T
Growers should seek burnt injuries to their plants. Dry plant from the pesticide Dualitite, known as pome burn, can be shown as a variety of symptoms. These symptoms usually start at the top of a leaf and can be chlorotic / yellow. Some small round brown / black lesions are at the top of common leaves. Thimet injury is more symmetrical and has a common effect on different sheets at the same time. Symptoms can be seen near the leaves of the leaves and may have a wedge or V-shaped appearance. The reason for the symmetry is that the different plants and leaflets are exposed to the compound porate in the field at the same time.
“Immunization can sometimes be frightened, but you have no worries about it and it is a bigger sign that the Thimet is doing,” said Anco.
A thimet injury can look a bit on the window or on the leaf throat.
Hopperburn leads to the release of potatoes of potato leaves on leaves and is yellow (without brown) and does not produce lesions within the chlorine of the injury. The treatment for barnacles should begin when 15-20 per cent of the sheets are applied for. Hopperburn usually goes up in June or July and usually starts on the edge of the fields, but Anco said he hasn't seen it yet this year.
Leaf lung disease usually creates small black lesions within the largest nervous area on a leaf. This large brown / necker spot of slaughtered leaf tissue can take a wedge shape. Anco said that most fungicides regularly used to make leaf spot control are likely to be effective against leaf torch.
The best window for planting peanuts in South Carolina is 5-25 May. The optimum temperature for peanut growth and development is 86 degrees. Many diseases are driven in part by high soil temperatures. In addition, high temperatures can delay plant growth and reduce drought flower production stress and pollination.
Weather information from the Edisto Research and Education Center shows that the average high temperature for May is 88.8 degrees.
Denise Attaway reports to the Public and Agricultural Service in Clemson University Agricultural, Forestry and Life Sciences College.
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