Co-authored with Albert Tenuta, Pathologist, Field Crops In 2016 the milder winter conditions resulted in early leaf and stripe rust infections in Tennessee and Kentucky. This resulted in rust spores being blown into Ontario earlier than we typically see. By mid-May 2016, stripe rust was prevalent in most areas of southwestern Ontario. Growers who selected […]
Co-Authored with Albert Tenuta, Field Crop Pathologist, OMAFRA OMAFRA field crop staff with the assistance from members of the Ontario Agri-Business Association (OABA) have completed the annual Provincial corn ear mould and mycotoxin survey. These mycotoxins, particularly vomitoxin (DON) produced primarily by Gibberella/Fusarium ear moulds can be disruptive when fed to livestock, especially hogs. The […]
The when, what and where of wheat leaf and Fusarium head blight (head scab) disease management Martin Chilvers and Martin Nagelkirk, Michigan State University; Albert Tenuta, OMAFRA; Damon Smith, University of Wisconsin-Madison; Kiersten Wise, Purdue University; Pierce Paul, The Ohio State University Wheat leaf diseases such as powdery mildew, Septoria leaf spot and stripe rust […]
Co-Authored with Albert Tenuta The OMAFRA Field Crops team conducted its annual vomitoxin survey to assess the presence of corn ear mould and grain vomitoxin in the 2016 corn crop. Vomitoxins can be produced by Gibberella and Fusarium ear moulds and can be disruptive when fed to livestock, particularly hogs. A total of 121 samples […]
The following scouting guides for disease identification in soybean are available for download by clicking on the headings below. Scouting for common soybean seed diseases Scouting for common soybean stem diseases Soybean vein necrosis virus Charcoal Rot White Mould Stem Canker Pod and Stem Blight and Phomopsis Seed Decay Soybean seedling diseases and disorders Scouting […]
The 2016-2017 version of OMAFRA Publication 812, Field Crop Protection Guide, and can be downloaded here or by clicking on the the book cover thumbnail below. Publication 812 is the source of pest control information for field crops. The easy to read tables provide information and comments on insect and disease control products for the major field crops […]
Stripe rust symptoms are increasing in the southwest this week and the following publication “Identifying Rust Diseases in Ontario” is a good resource to distinguish between stripe, leaf and stem rust. This publication was developed by the multi-state and OMAFRA extension and research committees for small grain diseases, NCERA-184 & WERA-97 with support from the Grain […]
Fusarium head blight continues to be of significant economic concern in Ontario as well as other provinces. Although new tools have helped, it is not realistic to expect a single cultural or management practice to effectively manage this devastating disease alone. The integration of the various cultural or management practices (“tools”) into a coordinated FHB […]
Greg Stewart, OMAFRA Corn Specialist Albert Tenuta, OMAFRA Field Crop Pathologist The OMAFRA Field Crops team has completed the survey of the 2014 Ontario corn crop to determine ear mould incidence and the occurrence of mycotoxins in the grain. These mycotoxins, particularly vomitoxin (DON) produced primarily by Gibberella/Fusarium ear moulds, are grading factors and can […]
Root rot is becoming visually evident in many edible bean fields now that beans are entering a more rapid vegetative growth phase and will have a high demand for water and nutrients. Pounding rains, compaction, tillage pans, poor internal drainage and soil structure are common culprits for inducing root rot. Common visual symptoms include stunting […]
This spring’s challenging planting conditions has resulted in quite a few of uneven canola stands with both reduced populations and delayed emergence. This has some growers weighing the merits of applying a fungicide this season. Sclerotinia incidence varies greatly between fields and years thus making routine spraying of fungicide unprofitable. However when the risk of […]
Co-Authored by: Albert Tenuta, OMAF & MRA Field Crop Pathologist The OMAF and MRA Field Crops team has recently completed a survey of the 2013 Ontario corn crop to determine ear mould incidence as well as the occurrence of mycotoxins in the grain. These mycotoxins, particularly vomitoxin (DON) produced primarily by Gibberella/Fusarium ear moulds can […]
Co-Author: Albert Tenuta, OMAFRA Field Crop Pathologist The annual corn ear mould and vomitoxin survey by the OMAFRA Field Crops team indicates that the 2012 Ontario corn crop is distinctly low in ear moulds and vomitoxin. However, stakeholders are reminded that individual field conditions (environmental, hybrid, tillage, rotation, etc.) are important in ear mould and […]
The University of Guelph Pest Diagnostic Clinic confirmed this week Soybean Vein Necrosis Virus (SVNV) infection in soybean plants OMAFRA collected in Kent and Elgin counties last week. SVNV is a new soybean disease which was first identified in Tennessee in 2008. Since then the disease has been reported in many other States and most […]
In Ontario there are many root/stem diseases which cause wilting symptoms in soybeans. With the hot, dry conditions this year over much of the province some of these diseases such as stem canker, Fusarium wilt, charcoal rot have taken advantaged of the additional stress. Fusarium wilt or blight of soybeans can affect soybeans at any […]
