Online at:www.uky.edu/KPNNumber 1288 November 1, 2011 ANNOUNCEMENT -New Publication CORN -Corn Seed Treatment for Nematodes ANNOUNCEMENT New PublicationBy Cheryl Kaiser A new publication, Foliar Fungicide Use in Corn and Soybean (PPFS-MISC-05), is now available at http://www.ca.uky.edu/agcollege/plantpathology/e xt_files/PPFShtml/PPFS-MISC-5.pdf. It can also be accessed via the publications page of thePlant Pathology Extension Web site. The authors are Drs. Donald Hershman and Paul Vincelli, Extension Plant Pathologists. This fact shee t discusses the use of fungicides for controlling various corn and soybean diseases, the importance of making a disease risk a ssessment, and the potential for negative impacts of unnecessary fungicide applica tions. In addition , recent ‘plan t health’ claims made by some fungicide manufacturers are addressed. CORN Corn Seed Treatment for Nematodes By Paul Vincelli This article provides a short review of nematicidal seed treatments for corn. Nematodes a re microscopic roundworms that attack roots of the corn plant (Fig 1). There are two products currently on the market: SOYBEAN -Western Corn Rootworm ‘Soybean Variant’ Surveillance in Kentucky, 2011 Avicta® products These include Avicta® Duo and Avicta® Complete Corn seed treatment. The nematicid al active ingredient in these products is abamectin. Both products also contain an insecticide, and Avicta® Complete Corn also contains a fungicide. Based on the available published data, performance of Avicta® against nematodes in corn and other f ield crops is erratic. In the majority of tests, Avicta® pr ovided no statistically significant reduction in nematode numbers or in crop performance. However, in some tests, abamectin does indeed provide a statistically significant reduction in nematode number or reproduction, and sometimes this results in improved crop performance (improved root weight, increased y ield). Also, in some tests, Avicta Complete Corn improves crop performance not from nematode control, but from the insecticide/fungic ide component. VOTiVO™ products The nematicidal active ingredient in VOTiVO™ products is a bacterium calledBacillus firmus. Bacillus firmus is not a chemical poison, but rather is a bacterium that forms a protective barrier that may repel nematodes. It is currently sold only in a premix as Poncho/VOTiVO™, which alsocontains an insecticide. There are very few published studies on performance of Bacillus firmus. Those that are available suggest results are very erratic. Lexington, KY 40546
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