Wageningen University & Research uses computer models to develop sustainable management strategies in the control of potato late blight, caused by Phytophthora infestans. At the moment, large amounts of fungicides are used to control the disease. Organic farmers face an additional challenge because they are not allowed to use these chemicals. From an environmental point of view, these chemicals are also very polluting and therefore sustainable late blight management strategies are needed. In Ph.D research study, computer models have been used to investigate how the disease spreads in an agricultural landscape and to analyze the effect of growing resistant varieties.In Francine Pacilly's Ph.D. research, computer models have been used to investigate how the disease spreads in an agricultural landscape and to analyze the effect of growing resistant varieties. These models show that an increase in the number of potato fields with resistant varieties increases the risk that aggressive strains of the pathogen emerge and spread. This risk decreases if more than 50 per cent of the acreage of potato fields consists of resistant varieties. So, many resistant potatoes are not yet available so alertness is required. Various strategies are available to limit the consequences of a breakthrough, for example the spatial allocation of crops in combination with the use of small amounts of fungicides to limit the environmental impact. In addition, growing resistant varieties with multiple resistance genes reduces the risk of susceptibility to the potato disease. It is expected that these type of varieties will enter the market soon.Last year workshops with farmers were organized to increase awareness about the risk of resistance breakdown. In these workshops, the computer model was used to present several model scenarios to conventional and organic farmers. These workshops were very useful for showing farmers how the disease spreads in a landscape over time and space and for showing the effects in the long term. After the workshop farmers agreed that resistance management is important to increase the durability of resistant varieties and that collaborative action is needed. The workshops were useful to bring farmers together and to discuss strategies in the control of late blight to reduce the impact of the disease.In order to develop sustainable strategies it is important to consider all factors that influence late blight control such as the disease, the crop and control strategies of farmers. This research is part of the Complex Adaptive Systems program of Wageningen University where the goal is to identify these factors and to analyze how they influence each other. Potato late blight as one system brings a future without chemical control closer.
Canada’s Pest Management Regulatory Agency [PMRA] recently announced it is restarting the review process for mancozeb. All current final decisions and proposals regarding MRLs for mancozeb products will be removed and a new proposal for consultation will be posted. The PMRA released its evaluation for mancozeb and metiram products in June 2018. According to that decision, all uses of products containing mancozeb (Manzate, Penncozeb, Dithane, Ridomil Gold MZ and Gavel) and metiram (Polyram) were to be cancelled with the exception of foliar applications to potatoes. Representatives from the Ontario Fruit and Vegetable Growers Association and the Canadian Horticulture Council met with PMRA to voice their concerns about the loss of these products and a new review process was agreed upon. The decision for metiram could not be reversed for legal reasons. This means that as of June 2020, Polyram cannot be used on any crop except potatoes and the label will reflect that change.
The Pest Management Regulatory Agency recently announced that it will be cancelling the use of the group M3 chemicals mancozeb and metiram in a wide range of crops, including field tomatoes. In 2020 products like Manzate, Penncozeb, Dithane and Polyram will no longer be available for sale and in 2021 use will be banned completely. This will ultimately have an effect on how we control diseases, including anthracnose, early blight and, most importantly, late blight. Although mancozeb is currently an important player in fungicide programs, tomato growers do have other options available.For best control it is always good to start with preventative or protectant fungicides once environmental conditions are conducive to disease development and before symptoms appear. | READ MORE
Health Canada’s Pest Management Regulatory Agency (PMRA) has released its decision on the re-evaluation of mancozeb and will continue registration only for foliar application to potato crops.“All other uses of mancozeb are being cancelled due to unacceptable risks to human health and will be removed from the labels,” states a summary of the decision.Foliar application on potatoes has been limited to 10 applications per year at a maximum application rate of 1.68 kg of active ingredient per hectare with a seven-day interval between applications and a one-day pre-harvest interval using aerial or ground spray only.Product labels must be changed within 24 months. Registration of products being cancelled as a result of the review will expire 36 months after the release of the decision. Chemical companies have 12 months and retailers 24 months to sell old product.
Syngenta Canada Inc., is pleased to announce the registration of Revus fungicide as a potato seed treatment for the suppression of pink rot and control of seed‑borne late blight in potatoes.Pink rot is a devastating, soil-borne disease caused by the pathogen Phytophthora erythroseptica that thrives in wet, poorly drained soils. Infection typically takes place pre-harvest, as the pathogen enters tubers through the stem end and lenticels.Tubers infected with pink rot will often decay during harvest and handling, which allows the pathogen to spread quickly from infected tubers to healthy tubers while in storage.“Every field has the potential for pink rot,” says Brady Code, eastern technical lead, with Syngenta Canada. “It takes a very small number of infected tubers going over harvest equipment or getting by on the belt to put an entire season of work in jeopardy and leave growers with far fewer healthy potatoes to ship.”Revus contains the active ingredient mandipropamid (Group 40) and works by protecting the daughter tubers from becoming infected with pink rot.“Growers can use Revus as part of an integrated approach to target fields where they’ve had pink rot issues in previous seasons, on their more susceptible varieties, and in tandem with other in-furrow and post-harvest fungicides,” explains Shaun Vey, Seedcare and Inoculants product lead with Syngenta Canada.Vey adds that Revus also provides control of seed-borne late blight (Phytophthora infestans). Syngenta research demonstrates that potatoes treated with Revus for seed-borne late blight have nearly perfect emergence, while untreated seed potatoes infected with late blight have a 20 to 30 per cent reduction in emergence.“Seed-borne late blight can have a big impact on emergence over time,” explains Vey. “When used as a seed treatment, Revus can help prevent seed piece decay and the spread of disease spores from seed piece to seed piece.”Revus is applied at 5.9-11.8 mL per cwt of seed (13-26 mL/100 kg of seed).Following a seed treatment application of Revus fungicide, the first foliar fungicide application should be a product that does not contain a Group 40 active ingredient.Maximum Residue Limits (MRLs) for mandipropamid, have been established for markets including Canada, the United States, Japan, and South Korea, in support of the seed treatment use pattern.For more information about Revus potato seed treatment, please visit Syngenta.ca; contact your local Syngenta Representative or our Customer Interaction Centre at 1‑87‑SYNGENTA (1‑877‑964‑3682).
Bayer announces the launch of Luna Sensation fungicide in Canada for stone fruit, root vegetables, cucurbit vegetables, leafy green vegetables, leafy petiole vegetables, brassica vegetables and hops.The foliar product is a co-formulation of two fungicide modes of action, a unique Group 7 SDHI (fluopyram) and a proven Group 11 (trifloxystrobin) to deliver superior disease control, resulting in higher yields and exceptional fruit quality.“Luna Sensation gives Canadian growers further access to the excellent disease control provided by Luna,” said Jon Weinmaster, crop & campaign marketing manager, corn & horticulture. “It’s designed for optimal efficacy on specific crops and diseases, most of which are not covered by the Luna Tranquility label, a product that has proven invaluable to many horticulture growers for several years already.”Luna Sensation is a systemic fungicide that targets highly problematic diseases such as sclerotinia rot, powdery mildew, and monilinia.It also has added benefits for soft fruit.“Experiences of U.S. and Canadian growers show that Luna offers post-harvest benefits in soft fruit, improving quality during transit and storage”, says Weinmaster “It’s an added benefit that comes from excellent in-crop disease control.”The addition of Luna Sensation from Bayer extends the trusted protection of the Luna brand to a broader range of crops: Luna Tranquility, a Group 7 and Group 9 fungicide, is registered for apples, grapes, tomatoes, bulb vegetables, small berries and potatoes Luna Sensation is registered for stone fruit, root vegetables, cucurbit vegetables, leafy green and petiole vegetables, brassica vegetables and hops Luna Sensation will be available to Canadian growers for the 2018 season.For more information regarding Luna Sensation, growers are encouraged to talk to their local retailer or visit: cropscience.bayer.ca/LunaSensation
Five new fertilizer-compatible products are expected to be available from Vive Crop Protection for U.S. corn, sugarbeet and potato growers in 2019. Each product includes a trusted active ingredient that has been improved with the patented Vive Allosperse Delivery System.AZteroid FC 3.3 is a high-concentration, fertilizer-compatible fungicide that improves plant health, yield and quality of key field crops, including potatoes, sugarbeets and corn. AZteroid FC 3.3 controls seed and seedling diseases caused by Rhizoctonia solani and certain Pythium spp. It contains azoxystrobin, the same active ingredient as Quadris.Bifender FC 3.1 controls corn rootworm, wireworm and other soil-borne pests in corn, potatoes and other rotational crops. Bifender FC 3.1 has a new high-concentration, fertilizer-compatible formulation and contains bifenthrin (same as Capture LFR).TalaxTM FC fungicide provides systemic control of pythium and phytophthora, similar to Ridomil Gold SL but in a fertilizer-compatible formulation. Talax FC contains metalaxyl and helps potatoes and other crops thrive right from the start, resulting in improved yield and quality.MidacTM FC systemic insecticide is a fertilizer-compatible imidacloprid formulation that controls below-ground and above-ground pests in potatoes and sugarbeets. It provides the same long-lasting protection of Admire PRO but with the convenience of being tank-mix compatible with fertilizers, micronutrients and other crop inputs.AverlandTM FC insecticide is a fertilizer-compatible abamectin formulation that controls nematodes in corn. It also controls potato psyllid, spider mites, Colorado potato beetle and leaf miners in potatoes. In-furrow application trials for nematode control in a wide range of crops are under way.All of these fertilizer-compatible products use the Vive Allosperse Delivery System - the first nanotechnology registered for U.S. crop protection. Products containing Allosperse are the best mixing products on the market, whether they are used with each other, liquid fertilizer, other crop protection products, micronutrients or just water.Brent Petersen, president of Cropwise Research LLC, performed trials on behalf of Vive Crop Protection to test mixability of the company’s products. During spring 2018, he mixed all five of the new products together with liquid fertilizer and observed, “We didn’t see any separation or settling out. It was nice to see because we often see products that aren’t compatible with other products, and especially with liquid fertilizer.”EPA registration is pending for Talax FC, Midac FC and Averland FC and the new formulations of AZteroid and Bifender.
The Pest Management Regulatory Agency (PMRA) recently announced the approval of minor use label expansion registrations for Venture L Herbicide for control of labeled weeds on rhubarb, the bulb onion subgroup 3-07A, green onions, caneberries subgroup 13-07A and lettuce in Canada. Venture L Herbicide was already labeled for use on a number of crops in Canada for control of several weeds.These minor use projects were submitted by Agriculture & Agri-Food Canada, Pest Management Centre (AAFC-PMC) as a result of minor use priorities established by growers and extension personnel. | READ MORE
The Pest Management Regulatory Agency (PMRA) recently announced the approval of a minor use label expansion registration for Prowl H2O Herbicide for control of labeled weeds on direct seeded or transplanted cabbage, cauliflower and broccoli grown on mineral soil in Canada. Prowl Herbicide was already labeled for use on a number of crops in Canada for control of several weeds.These minor use projects were submitted by Ontario as a result of minor use priorities established by growers and extension personnel.The following is provided as an abbreviated, general outline only. Users should be making weed management decisions within a robust integrated pest management program and should consult the complete label before using Prowl H2O Herbicide. | READ MORE
Researchers are combining new digital tools, computer technologies and machine learning to bring cost-effective weed control solutions to the field. Although still in the early stages, this new high-tech solution is being designed as an advanced spot-spraying precision technology that will help farmers reduce input costs and add another management tool to their integrated management systems.
January 8, 2018, Guelph, Ont – The Pest Management Regulatory Agency (PMRA) recently announced the approval of minor use label expansion registration for Prowl H2O herbicide for control of labeled weeds on transplanted field tomatoes grown in mineral soil in Canada. Prowl H2O was already labeled for use on a number of crops in Canada for control of several weeds. This minor use project was submitted by Ontario as a result of minor use priorities established by growers and extension personnel. Prowl H2O herbicide is toxic to aquatic organisms and non-target terrestrial plants. Do not apply this product or allow drift to other crops or non-target areas. Do not contaminate off-target areas or aquatic habitats when spraying or when cleaning and rinsing spray equipment or containers. In field tomatoes, do not apply Prowl H2O more than once in two consecutive years. Follow all other precautions, restrictions and directions for use on the Prowl H2O herbicide label carefully. For a copy of the new minor use label contact your local crop specialist, regional supply outlet or visit the PMRA label site.
December 11, 2017, Guelph, Ont – Bayer recently announced the launch of Sencor STZ, a new herbicide for broad-spectrum control of all major annual grass and broadleaf weeds in potatoes. Sencor STZ combines Sencor with a new Group 14 mode of action, providing Canadian potato growers a new weed control option for their field. As a pre-emergent herbicide, Sencor STZ has uptake through the roots and shoots of weeds, providing early season weed control during critical crop stages. The product works on emerged weeds and provides residual broad-spectrum control to weeds yet to germinate. It will be provided in a co-pak. “As the first innovation in the potato herbicide space in many years, Sencor STZ offers an exciting new tool for Canadian potato growers to combat a wide spectrum of weeds and maximize crop yield,” says Jon Weinmaster, crop and campaign marketing manager for horticulture and corn at Bayer. Sencor is a proven performer that delivers reliable broad-spectrum weed control to Canadian potato growers. Trials utilizing Sencor STZ have demonstrated efficacy against Group 2- and 7-resistant biotypes, while providing essential control of Group 5-resistant broadleaf weeds, demonstrating the added benefit of the product’s Group 14 herbicide. “Given the increasing occurrence of herbicide resistance and a potentially shrinking number of solutions available for combatting tough-to-control weeds, Sencor STZ presents a welcome opportunity for growers to ensure they have the crop protection they need,” says Weinmaster. “This new herbicide affirms Bayer’s position as a leader in potato solutions and our commitment to growing and furthering innovation within horticulture.” Sencor STZ will be available to potato growers in Eastern Canada and British Columbia for the 2018 season. Sencor STZ comprises Group 5 (metribuzin) and Group 14 (sulfentrazone) herbicides. For more information regarding Sencor STZ, growers are encouraged to talk to their local retailer or visit cropscience.bayer.ca/SencorSTZ.
The use of biocontrol pest methods in horticulture is growing, whether it’s trap crops, pheromone traps, predatory insects or biopesticides.
The Pest Management Regulatory Agency (PMRA) recently announced the approval of minor use label expansion registrations for Entrust and Success insecticides for control of cabbage maggot on Brassica leafy greens crop subgroup 4-13B and Brassica head and stem vegetables, crop group 5-13 in Canada. Entrust and Success insecticides were already labeled for use on a wide variety of crops in Canada for control of several insects.These minor use projects were submitted by Quebec as a result of minor use priorities established by growers and extension personnel. | READ MORE
If you were going to tank mix chemical pesticides, you would of course read the label to check for compatibility before mixing products. The same concept applies when using living organisms for pest control. Whether you are using parasitoid wasps, predatory mites, microorganisms, or nematodes, you need to know whether your biocontrols are compatible with each other and any other pest management products you plan to use. For example, a biocontrol fungus might be killed if you tank mix it with (or apply it just before) a chemical fungicide. Insecticides (whether or not they are biological) could be harmful to natural enemy insects and mites. Even some beneficial insects are not compatible with each other because they may eat each other instead of (or in addition to) the pest. | READ MORE
Corteva Agriscience, Agriculture Division of DowDuPont, recently announced that the Pest Management Regulatory Agency (PMRA) in Canada has granted Dow AgroSciences upgraded approval for Closer Insecticide use to actively control Woolly apple aphid in pome fruit crops.“Canadian apple growers who have used Closer in the past know of its exceptional speed and ability to knockdown aphids. This upgraded designation reinforces the quality and efficacy of Closer and we are pleased that the PMRA has responded to the ongoing need to control insect infestation,” explains Tyler Groeneveld, category leader, Horticulture with Corteva Agriscience.This approval is significant as it gives growers greater access to a highly effective product that combats sap feeding insects at various stages of growth and outbreak. Insects such as Woolly apple aphid can cause extensive crop damage, ultimately impacting the quality and value of orchard crops.Closer Insecticide, powered by Isoclast active, is a revolutionary product ideal for control of both resistant and non-resistant pests, delivering the active ingredient sulfoxaflor, which is classified by the Insecticide Resistance Action Committee as the sole member of IRAC Subgroup 4C Sulfoximines. The active ingredient moves quickly through the plant and has excellent systemic and translaminar activity that controls insect pests both on contact and by ingestion. The results are fast knockdown and residual control of aphids and other sap feeding insects.Closer is highly selective and has minimal impact on beneficial insects. The properties and overall spectrum of activity of Closer Insecticide makes it an excellent fit for treatment when outbreaks occur as well as part of Integrated Pest Management Programs (IPM) to minimize flare-ups.
A potato variety genetically engineered to resist potato blight can help reduce the use of chemical fungicides by up to 90 per cent, according to a new study - drastically reducing the environmental impact of potato farming.Potato blight, caused by a water mould called Phytophthora infestans, can rapidly obliterate potato crops, and is one of the biggest problems in potato farming. Working together, scientists from Wageningen University & Research and Teagasc, the Irish Agriculture and Food Development Authority, have developed a two-pronged approach: a genetically modified potato, along with a new pest management strategy, that combine for healthy crops with minimal fungicide use. | READ MORE
Corteva Agriscience, Agriculture Division of DowDuPont, recently announced that the Pest Management Regulatory Agency (PMRA) in Canada has granted Dow AgroSciences new label registration for Closer Insecticide for the control of Campylomma verbasci (mullein bug) effective immediately. This announcement is significant as it means Canadian apple growers now have full access to a highly effective product for pest control.“Closer has always been known for its targeted and quick control of aphids and other orchard pests. With this registration, growers can have even greater confidence in the quality and efficacy of Closer on apples when outbreaks occur as well as for resistance management,” explains Tyler Groeneveld, category leader, Horticulture with Corteva Agriscience.Closer Insecticide, powered by Isoclast active, is a revolutionary product ideal for control of both resistant and non-resistant pests, delivering the active ingredient sulfoxaflor, which is classified by the Insecticide Resistance Action Committee as the sole member of IRAC Subgroup 4C Sulfoximines. The active ingredient moves quickly through the plant to deliver excellent systemic and translaminar activity. Pests are controlled both through contact and by ingestion, resulting in fast knockdown and residual control.Closer is highly selective and has minimal impact on beneficial insects. The properties and overall spectrum of activity of Closer Insecticide makes it an excellent fit for treatment when outbreaks occur as well as part of Integrated Pest Management Programs (IPM) to minimize flare-ups. Further information can be found at: www.corteva.com.
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Ontario Harvest GalaThu Nov 01, 2018
Fall Harvest Mon Nov 05, 2018
Ontario Processing Vegetable Growers - District meeting Tue Nov 06, 2018
Potato Growers of Alberta Annual General MeetingTue Nov 13, 2018 @ 8:00am - 05:00pm