In recent years, many corn growers in Ontario have wrestled with gibberella ear rot in the crop and the high levels of deoxynivalenol (DON) levels it can produce in the grain. It’s made for stressful harvest seasons, especially in 2018 when mycotoxins produced by the gibberella fungus in some fields climbed well above safe feeding… Read More
Tag: Albert Tenuta
Tar spot was a little late arriving in Ontario cornfields in 2023, but the leaf disease ramped up post tasseling, and with an extended fall, took a late-season bite out of grain yields in southwestern areas of the province. Growers who sprayed fungicides to defend their crop against disease were rewarded with higher yields, reports… Read More
Tar spot leaf disease has been a little tardy in 2023, but the later-arriving yield robber is still having an impact on the Ontario corn crop. Ontario Ministry of Agriculture, Food and Rural Affairs plant pathologist Albert Tenuta says a dry start to the growing year meant tar spot arrived a little late in 2023… Read More
When heavy summer rains arrive, Albert Tenuta’s phone starts to ring. The Ontario Ministry of Agriculture, Food and Rural Affairs plant pathologist started hearing from growers across the province in late June as soil-borne disease moved into many soybean fields after a series of pounding rain events. When soybeans get wet feet in early summer,… Read More
Soybeans don’t like wet feet, and when rain is plentiful in June and July, saturated soils typically lead to an increase in fungal seedling diseases. Four of the most common culprits are pythium and phytophthora root rots as well as rhizoctonia and fusarium. On this episode of the RealAgriculture Soybean School, Ontario Ministry of Agriculture,… Read More
Wet, humid conditions can cause corn diseases to advance quickly. The usual suspects are always a concern: Northern corn leaf blight, gibberella ear rot, and more, but a new-to-Ontario disease, tar spot, has been harder to predict when it comes to threat level. In 2022, early indications showed the disease was present but a dry… Read More
Thanks for tuning in to this Agronomic Monday edition of RealAg Radio with host Shaun Haney. We will hear from Peter Johnson of RealAgriculture on nitrogen, ultra early seeding, sunshine, and much more! Then, we’ll hear from Albert Tenuta, plant pathologist with Ontario Ministry of Agriculture Food and Rural Affairs, on tar spot risk in… Read More
The Christmas holidays are here! What better way to spend the time than catching some of the 30 Corn School episodes RealAgriculture published in 2022? We kicked off the season in January with Purdue University agronomy professor Dr. Tony Vyn who tackled the question: where does yield come from? Vyn notes that hybrid research over… Read More
Fungicides are a key tool in the tar spot management toolbox. But what’s the best time for growers to apply a fungicide to get optimal control of the disease and the best return on their crop protection investment? On this episode of the RealAgriculture Corn School we catch up with Ontario Ministry of Agriculture, Food… Read More
Why is there an irrigated corn crop growing in the middle of the University of Guelph’s Ridgetown campus? On this episode of the RealAgriculture Corn School, host Bernard Tobin takes a trip into the research maze to get a look at what happens in this corn misting nursery. Tobin first encounters University of Guelph associate… Read More
It appears in 2022 that Ontario growers have little to worry about when it comes to corn ear moulds such as gibberella contributing to elevated levels of mycotoxins in the corn crop. In late October, the annual Ontario corn ear mould and deoxynivalenol (DON) mycotoxin survey found 98 percent of samples tested low — less… Read More
It’s time for the second Ontario Diagnostic Day episode of The Agronomists! For this episode, guest host Bernard Tobin (with a great hat) guides guests Horst Bohner and Albert Tenuta, both with the Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) on an exploration of soybean seed quality and corn leaf diseases. This episode… Read More
Tar spot was found in many regions of Ontario again in 2022 but dry weather conditions throughout the growing season reduced the leaf disease’s impact on the corn crop. On this episode of the RealAgriculture Corn School, we pay a return visit to the provincial tar spot nursery at Rodney, Ont, where Ontario Ministry of… Read More
It’s time for Day 4 of Ontario Diagnostic Days! The annual Ontario crop diagnostic days were back in the field on July 20 and 21, 2022, but only at Ridgetown campus University of Guelph. Not everyone could attend these two field days, so the organizing committees of these highly successful in-field education and learning events are… Read More
After a methodical march north from the Corn Belt, tar spot has now gained a foothold in Ontario. Last year, the yield-robbing leaf disease was confirmed in five counties in the southwestern, stretching from Essex to Simcoe. Characterized by tar-like speckling on the upper surface of corn leaves, the fungal pathogen has been delivering yield… Read More