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BASF Launches Cevya Fungicide in Canada

 BASF introduces Cevya fungicide featuring the new Revysol fungicide active ingredient (AI) which is now registered in Canada*. Cevya fungicide offers fast and continuous control of key diseases in fruits and vegetables including apples, potatoes and sugar beets.  “Cevya fungicide is a systematic fungicide providing preventative and post infection control of key diseases for growers challenged with resistance and seeking to maximize their yields. The fungicide controls biotypes that may have developed…

GM Potato Trials Point to Blight-Resistant Crops of the Future

A genetically modified potato with improved tuber quality and resistance to the devastating disease late blight has progressed successfully through the latest stage of trials. The field trials follow successful lab experiments to modify Maris Piper potatoes with late blight resistance genes from wild relatives of potato called Solanum americanum and Solanum venturii. To improve tuber quality, the modified Maris Piper lines also have genes switched off – or “silenced” – to…

Potato Virus Y is the Most Serious Threat to Potato — Some Strains More than Others

By American Phytopathological Society Potato virus Y (PVY) is the most serious problem facing the potato industry in the United States and is the main cause for rejection of seed potato lots. The virus affects potatoes in two ways: It reduces the yield of potato tubers by 70-80% and also negatively affects the quality of the remaining tubers due to necrotic reactions. PVY encompasses a complex network of strains with a range…

Ontario Crop Production Update Oct. 11

Sunny, balmy weather this week allowed growers to make lots of progress with the harvest.  Many growers have finished digging. According to Mark VanOostrum, 80 per cent of the chipping crop has been dug.  The size profile is better than expected, and the quality is very good.  Rainfall was below average in June, July and August in the Alliston area, which resulted in poor crops in non-irrigated fields. I visited P &…

Driving Out Blight With Dual Control

Combining methods of disease control rather than relying on a single resistance strategy can extend the durability of crops by many years, confirms computer modelling that draws on classical population genetics theory. The finding comes from assessing the spread and virulence of the pathogen responsible for late blight of potato, Phytophthora infestans. The pathogen, which caused the Great Irish Famine in the mid-nineteenth century and led to the new science of plant…

Better Sooner Than Later

Late blight is a deadly disease that requires integrated management, including foliar fungicides as a key tool. Usually potato growers make repeated preventive applications of broad-spectrum fungicides starting before row closure, and then use late blight-specific fungicides if the disease is found in their fields. Now studies in Ontario and the Maritimes are working on easy-to-use technologies for early detection of late blight that could allow more targeted fungicide strategies. Late blight…

Harvest and Storage of Potato Crops Exposed to High Moisture Levels

Frequent and excessive rain received during the growing season is potentially conducive, especially in low spots and/or in poorly drained areas, to the development of some diseases, such as pink rot and Pythium leak (water rots). Growers with potato crops exposed to high moisture levels should follow the management practices below. Top kill at least two weeks prior to harvest to allow time for infected tubers to rot and to promote tuber…

Ontario Potato Production Update—September 9, 2019

According to Mark Van Oostrum, a few growers will start digging the storage crop this week, but the majority will start next week on September 16.  All the best for the storage crop harvest! Pink eye and road-mapping are both physiological problems that have been detected recently in a few fields. The photo above shows what pink eye looks like on tubers when freshly dug; the lesions will dry up and turn…

End-of-season checklist for managing late blight in Alberta

“Both industry and the public have increased awareness efforts with the intent of returning Alberta to late blight-free status,” explains Robert Spencer, commercial horticulture specialist at the Alberta Ag-Info Centre. “No cases of late blight have been reported as the 2019 growing season wraps up, despite favourable conditions for the disease in some parts of Alberta and some spores caught in monitoring traps.” He recommends that commercial or home garden potato or…

Ontario Potato Production Update: Sept. 3, 2019

Harvesting fresh market and field fry potatoes continued over the long weekend.  Quality of both are very good, but yields are variable depending on the field. The storage crop is being top-killed according to the planting date. The spore traps keep detecting DNA of late blight in Dufferin, Simcoe and Norfolk Counties. This is a very important alert for growers in Dufferin County where there are still fields that will need at…

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