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Alternaria is becoming a major concern for Brassica growers
Alternaria leaf spot and head rot has become increasingly difficult to manage in Brassica vegetable crops grown in Canada. Brassica greens that are marketed for the leaves have zero tolerance for...
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Controlling Onion Maggot without Lorsban
This will be the second growing season that Lorsban, or other chlorpyrifos products, will not be used to manage onion maggots in onions in Canada. Onion maggot management now relies predominantly on...
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How sterile flies replaced Lorsban for two onion growers
In 2018 and 2019, before the phase-out of chlorpyrifos, two growers opted to release sterile flies as their onion maggot management strategy going forward. Over the next few years, populations of...
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Onion maggot management without chlorpyrifos
Over the past 5 years, sterile onion maggot flies have been released at several onion fields in Ontario to see if onion maggots could be managed without a Supresto 75 WS seed treatment, or...
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New Disease Report: Anthracnose of garlic scapes
Katie Goldenhar – Horticulture Pathologist Anthracnose of garlic has been reported to infect only garlic scapes and bulbils. This disease has been observed in multiple northern US states including New...
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A New Strategy for Managing Garlic Stem and Bulb Nematode
The bulb and stem nematode (Ditylenchus dipsaci), is a major pest of garlic that has destroyed hundreds of acres of garlic in Canada over the past decade. The nematodes survive in the soil as well as...
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Stored garlic might have mites
Garlic was harvested back in July and over the past five months bulbs have either been cracked for planting, sold for consumption, or stored for later sales. This year, many bulbs coming out of...
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Using fungicides for Stemphylium leaf blight in onions
Stemphylium leaf blight (caused by a fungus, Stemphylium vesicarium) of onion was first identified in Ontario in 2008 and has since become the most economically important disease in onions. The main...
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Garlic Growers Association Launch New Clean Seed Program
The Garlic Growers Association of Ontario has just announced that it is taking orders from members for clean planting material from the SPUD unit at the New Liskeard Agricultural Research Station,...
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A scattered start for Leek Moth in 2019
Originally published in the September edition of The Grower Leek moth (Acrolepiopsis assectella) is a destructive pest of Allium species including onions, shallots and chives, but prefers leeks and...
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What is clean seed production?
Vegetatively grown crops such as garlic, potatoes or strawberries are amplified not by seed, but asexually by clones, daughter tubers or cuttings. Unlike true seed production, the offspring of clones...
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Tips for Broadleaf Weed Control in Pumpkins and Winter Squash
Originally published in ONvegetables in The Grower, April 2017 Even with the use of herbicides, broadleaf weed control in pumpkins and squash can be problematic. Product selection is key but timing and...
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Samples requested for clubroot survey
By Travis Cranmer, Vegetable Crops Specialist OMAFRA First appeared in ONvegetables in The Grower, April 2017. Clubroot, caused by the soil-borne pathogen Plasmodiophora brassicae can cause yellowing,...
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Three Problem Weeds for Asparagus
The website, Ontario CropIPM, contains the full range of pest management information from many vegetable crops, including asparagus. Many users do not realize that it is also home to weed galleries,...
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Sprayer Math for Banded Applications
Jason Deveau, Application Technology Specialist, OMAFRA Banding allows producers to save on chemical costs, reduce the potential for wasted spray and to make targeted applications, where they are most...
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The Potential for Spread of Phytophthora Blight of Cucurbits and Peppers in...
Excerpts taken from ONvegetables in the Grower, April 2014. A full pdf version of this article is available at 2014_Infosheet_Phytophthora-in-irrigation-water Phytophthora blight (Phytophthora capsici)...
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Disease Innoculum, the Gift That Keeps on Giving
From ONvegetables in The Grower, December 2013 Some years the weather patterns just work against us. Cool temperatures, intermittent rains and prolonged, heavy dews spell paradise for many crop...
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The next level of herbicide resistance – cross resistance
From ONvegetables in The Grower, February 2014 Kristen Obeid, Weed Management Program Lead (Horticulture), OMAF/MRA Herbicide resistant weed populations are now found throughout Ontario. The number of...
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Managing wash water to protect your farm stream
From ONvegetables in The Grower, February 2014 By Deanna Nemeth, Nutrient Management Program Lead (Horticulture)/ OMAF and MRA Fruit and vegetable producers have been looking for low cost methods to...
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Pest of the Month – Bacterial Spot of Pumpkins and Squash
From ONvegetables in The Grower, February 2014 Identification: Currently, bacterial leaf spot (Xanthomonas cucurbitacae) is not commonly found in Ontario. However, it is known to cause serious pumpkin...
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