Pests
Plant health partners in Canada, from industry associations to academia, come together to establish the Canadian Plant Health Council to collectively address evolving risks to plant and animal resources.
Published in Corporate News
Cabbage seedpod weevil was first found in canola crops in southern Alberta in 1995, and has since spread to central Alberta, much of Saskatchewan and recently reached Manitoba. Originally, a nominal threshold level canola growers were advised to spray was three to six weevils per one 180-degree sweep at the early flower stage based on experience from Washington State.
Published in Insect Pests
2018 was a bad year for flea beetles in Manitoba canola, according to John Gavloski, extension entomologist for Manitoba Agriculture.
Published in Canola
Recent scouting efforts and grower calls have indicated an increased presence of corn earworm in Ontario corn fields, according to OMAFRA's latest crop report. Some fields have reported high levels of the pest and late planted fields are the most at risk.
Published in Insect Pests
OMAFRA staff share their 2018 seasonal insect pest summary for the province of Ontario. Swede midge, armyworm and western bean cutworm were not big problems for canola, wheat and corn compared to previous years. In contrast, pests like cereal leaf beetle, alfalfa weevil, soybean aphids and pea aphids reached thresholds in some fields.
Published in Insect Pests
The Pest Management Centre is inviting submissions for its 2018 Pest Management Research Report (PMRR), an annual resource on integrated pest management of insect pests and plant diseases significant to the agri-food industry in Canada.
Published in Corporate News
Quinoa growers commonly find goosefoot groundling moth, tarnished plant bug, quinoa downy mildew, and Passalora leaf spot each season in Ontario quinoa fields. 
Published in Insect Pests
Health Canada has announced its plan to phase out most uses of the neonicotinoids clothianidin and thiamethoxam, citing that the two insecticides are being measured at levels harmful to aquatic insects.
Published in Insecticides
In Ontario there are a few pests to be concerned about before crops are harvested. OMAFRA's field crop team breaks down how to look for and treat Western bean cutworm, bean leaf beetle, stink and tarnished plant bugs in their latest crop report. 
Published in Insect Pests
Fortenza insecticide is now registered as a soybean seed treatment for control of below-ground pests such as European chafer, June beetle, wireworm and seed corn maggot, according to a release by Syngenta Canada. 
Published in Insecticides
The latest crop report covers post-harvest weed management and pest control for corn, soybeans and edible beans.
Published in Agronomy
Without resistant wheat varieties, wheat midge would be causing about $60 million in damages per year on the Canadian Prairies, according to Curt McCartney, a research scientist with Agriculture and Agri-Food Canada (AAFC). “There is a strong incentive to have resistant varieties for farmers,” he says.
Published in Agronomy
A research scientist at Agriculture and Agri-Food Canada in P.E.I is investigating natural ways to deal with pests that damage cabbage, canola and potatoes. 
Published in Insect Pests
Early season root rot has been reported in both soybeans and sunflowers, according to Manitoba Agriculture's Insect and Disease update. 
Published in Diseases
Armyworm has been spotted at low levels in winter wheat fields, increasing the need to scout for this pest in spring cereals and mixed forages.
Published in Insect Pests
With high canola prices relative to other commodities, the temptation to run continuous canola is high. But does it really pay in the short term? A research study shows that net returns aren’t necessarily better, and that insect and disease pressures increase over time.
Published in Canola
Cabbage seedpod weevils (CSW) are being found in spring canola, and the key to protecting your crop yield is to prevent adult CSW from laying eggs in newly formed pods.
Published in Insect Pests
Highlights from Ontario Field Crop News' latest crop report include another discovery of stripe rust in the Clinton area and edible bean planting expected to complete within the week. Limited rainfall has been good for dry hay production. Corn progress is all over the place in varying stages. For soybeans, thin stands are being observed in many areas but soybeans can compensate. Temperature models suggest alfalfa weevil development is delayed, but alfalfa weevil can still pose a risk. 

Corn

Corn planting is essentially complete. Due to variability in rainfall and soil fitness this spring, there is a wide range of crop stages. Early planted corn is now past the V6 stage and approaching row closure in some fields, while late planted corn on heavier textured soils is in the emergence to early V stages. Side dressing continues in many areas. While stands look good overall, there have been some comments about non-uniformity now showing up in some fields where soil conditions may have been pushed at planting, particularly in areas which have remained dry. Corn replants, mostly due to excessive rainfall in 2018, are reported to be below normal. There have been reports of some fields with heavy weed pressure where weed control has been delayed due to high demand for other sprayer activities. Good weed control from emergence to 6 leaf stage is critical for protecting from yield loss in corn.

On June 6, OMAFRA completed its annual Pre-Sidedress Nitrogen Test (PSNT) sampling survey at its zero nitrogen trial locations. This survey assesses soil nitrogen status by measuring natural background nitrogen mineralized from the soil. Average soil nitrate results came back at 12.7 ppm. This is slightly above the long term (2011-2017) average of 11.7, suggesting nitrogen mineralization processes appear normal this spring. The full report and details on the nitrogen status in 2018 corn fields is available online. This survey serves as a general guide. Soil nitrate results are highly field specific, and growers are encouraged to sample their own fields before making any nitrogen decisions.

Soybeans

Most areas of the province have completed planting, though some still continues on very heavy soil textured areas such as Niagara. Due to variability in planting date, crop staging ranges from planted to early emergence for later planted field to 3nd trifoliate for early fields. Thin stands are being observed in many areas. Issues range from soil conditions at planting, heavy rains after seeding resulting in crusting, seed corn maggot feeding, root rots, or extremely dry conditions. Fortunately soybeans are able to compensate for thin stands within reason. Leaving a stand of 90,000 plants per acre on medium textured soils is usually more profitable than replanting. (110 000 plants per acre on heavy clays) For those fields with very poor stands replanting is still a viable option at this date. Feeding from Bean Leaf Beetle has been reported so monitoring is recommended.

Forages

A large amount of hay has been cut over the past two weeks. While most dairy hay is complete, some first cut continues this week. Limited rainfall has been conducive for dry hay production as well. Yields have been reported to be good. Quality has been good, with the only challenge reported to be early season grass growth staying ahead of alfalfa due to the cool start in April. Alfalfa weevil has been observed in many areas and scouting is encouraged after first cut this year. Temperature models suggest alfalfa weevil development may be delayed, and could still pose a risk to early regrowth. Control is warranted if there are two or more active larvae per crown, or 4–8 larvae per 30 cm by 30 cm (1 ft2).

Winter wheat

The winter wheat crop is progressing well; however, some wheat stands are variable and considerable discolouration is still evident. In the driest areas wheat is starting to flare up due to a lack of moisture. Fusarium Head Blight fungicides (T3) have been going on as wheat progresses through the anthesis stage. A number of acres in the far southwest of the province did not receive a T3 fungicide as warm temperatures moved the crop quickly through the ideal application window. Stripe rust was reported on June 5th in the St. Mary’s area on a susceptible variety. A second field has since been reported in the Clinton area. Disease levels continue to remain low and as temperatures continue to increase, stripe rust becomes less of a concern. If growers are still considering a late T3 fungicide application for stripe rust control, pre-harvest intervals must be considered.

Canola

Canola is progressing well, with earlier planted fields in southern and eastern canola growing regions now at green bud stage or bolting. In northern regions the crop is approaching full rosette and expected to start bolting in the next week or two. Flea beetle is being reported, though pressure is generally low. Flea beetle must feed on the seedlings to be exposed to seed treatment insecticides. Foliar insecticide application is not warranted until at least 25% foliar feeding is observed, and once the crop is at the 4 leaf stage it can likely outgrow the feeding damage. Swede midge is now being observed, although populations are reported to be relatively low. Swede midge pheromone traps should be in place and checked every few days through to bolting. With some early reports of Cabbage Seedpod weevil, monitoring is recommended.

Edible Beans

A large portion of edible bean acres have been planted, with many growers done or expecting to be done within the next week. Planting continues in some localized areas where rainfall had delayed field operations, or for shorter season beans such as Cranberry beans. Early reports suggest good stands in most cases, with the exception where seedbeds were overly dry. Lack of heavy rainfall events over the past two weeks has limited crusting and other rainfall related plant loss issues.
Published in Agronomy
Flea beetles and cutworms continue to be the main insect concerns, according to John Gavloski in the latest Manitoba Insect and Disease Update. 

Foliar insecticide applications are occurring in many canola fields and some second insecticide applications to control flea bettles. There are also more reports of reseeding of canola because of feeding by flea beetles, particularly in the Southwest and Central regions.

There are also reports of insecticide use for cutworm in oats, wheat, canola, corn, sunflower and dry beans. Now is the time for cutworm feeding to intesify as cutworms get larger and their feeding more noticeable. Some of the heaviest feeding seems to be in the Central region and southwest Manitoba. 

The update also warns of early season infection of blackleg in canola, especially if the crop endured damage from hail, wind, frost or insect feeding. The question for growers is whether or not to use fungicide at the herbicide timing to protect their crop from blackleg infection. The update cites studies that show early fungicide application can reduce disease and increase yield. However, the growing conditions present in the studies are specific and there are other factors to consider. | READ MORE

Published in Insect Pests
With the loss of effective insecticides (e.g. lindane), wireworms have re-emerged in recent years as primary pests of potato, cereals and vegetables. Wireworms are the soil-dwelling larval stage of the click beetles (Elateridae). In this Insect of the Week, learn more about identification, scouting and management options. | READ MORE
Published in Insect Pests
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