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& M.A. 44187029) and Faculty at Penn State in collaboration with 16 other universities will utilize funding awarded by the 2018 USDA Specialty Crop Multi-State Program to monitor and forecast cucurbit downy mildew (CDM) over the next three years. Documenting impact is necessary for obtaining and sustaining funding to support this effort. Growers are advised to scout for the disease and initiate preventative sprays immediately , especially if the weather is going to be cool and wet. The Regional Weather section gives a broad view of the weather conditions existing immediately prior to and during the forecast period. Following the link will provide details about the transport events from that particular source / source region. Faculty at Penn State in collaboration with 16 other universities will utilize funding awarded by the 2018 USDA Specialty Crop Multi-State Program to monitor and forecast cucurbit downy mildew (CDM) over the next three years. The most important component of an effective management program for downy mildew is an effective, properly-timed fungicide program. 2,8 Jake Jones, Extension Agriculture Agent, Kent County; jgjones@udel.edu Cucurbit downy mildew epidemics are an annual occurrence in the Mid-Atlantic and Eastern US. However, even the Low and Medium rated trajectories may be helpful. The authors; the Department of Plant Pathology; Department of Marine, Earth, and Atmospheric Sciences; North Carolina State University; The University of North Carolina, their Governors, Trustees, officers, administrators, employees, and agents do not assume any responsibility for any interpretations of the data, nor do they warrant the fitness of the forecasts for any use. The causal agent is the fungal-like organism (oomycete), Pseudoperonospora cubensis(Sitterly 1992). The Cucurbit downy mildew forecasting system was refined by incoprorating models of pathogen biology in the spore transport model. Keeping abreast of when, and how severely, downy mildew is occurring in your area can help you determine the proper time to treat it. Cucurbit downy mildew is caused by the fungus-like oomycete pathogen Pseudoperonospora cubensis (P. cubensis).There are two types of P. cubensis isolates that can infect cucurbit crops and weeds referred to as clade 1 or clade 2 isolates. The USDA Agricultural Marketing Service (Agreement # AMI170200XXXG007) Previous supporting agreements: USDA NIFA 2007-39552-48673, 2010-34103-21133 and 2010-41530-21134. Downy Mildew ID: Pseudoperonospora cubensis: Chlorotic spots appear on the upper leaf surface and purplish or gray spores form on these spots on the lower leaf surface. In general, the source groupings are made so that they are as natural as possible and promote the greatest understanding of the forecasts. ( see example). In summary, to manage downy mildew effectively in cucurbit crops: 1) select resistant cucumber varieties, 2) sign up to receive alerts about downy mildew occurrence and routinely check the forecast web site to know where the disease is occurring and what crops are affected, Cucurbit vegetables grown in the U.S., namely watermelon, cucumber, squash, pumpkin and muskmelon, are worth $1.35 billion. ***, The CDM.ipmpipe.org website is supported in cooperation with The Pennsylvania Department of Agriculture (award No. And the key to that is applying mobile fungicides targeted to the pathogen starting when there is a risk of the pathogen being present. SIGN UP TO RECEIVE CUSTOMIZED TEXT AND/OR EMAIL ALERTS WHEN NEW OUTBREAKS ARE CONFIRMED! Please take this brief 10-minute survey to help us document the impact of this website as a resource for identifying, reporting, and managing cucurbit downy mildew (CDM) in commercial fields and home gardens. The links for the individual sources/source regions will contain specifics for the source or sources in question. They can only grow on live plants. Monitor Plants For Downy Mildew. Clicking on a link to a particular forecast day will lead to the appropriate Forecast Summary page for that day’s forecast. Photo by Allison Howell, Clay County UAEX. Commercially important species of cucurbits include watermelon (Citrullus lanatus), muskmelon (Cucumis melo), cucumber (Cucumis sativa), squash (Cucurbita pepo, Cucurbita moschata), and pumpkin (Cucurbita maxima). The release time is in Universal Time on a 24-hour clock, and will be set to correspond to about 10 am or 11 am local time. This information is specific to each trajectory. If needed, Epidemic Updates or Forecast Notes will be highlighted near the top of the page. Growers can register for e-mail and/or text alerts when cucurbit downy mildew (CDM) has been found in proximity to their specific farm location. The given threat rating is color coded corresponding to the likelihood of infection. The USDA Agricultural Marketing Service (Agreement # AMI170200XXXG007) Previous supporting agreements: USDA NIFA 2007-39552-48673, 2010-34103-21133 and 2010-41530-21134, The Risk Prediction / Outlook on the Forecast Summary page represents the risk to cucurbits, combines all the aerobiological elements into an evaluation of the risk of disease development associated with that source or group of sources. Picture 3. Please consult the County Extension Service personnel in your area if you have questions about these matters. Key characteristic of potential cucurbit downy mildew ) epidemic and the trajectory etc., can be found here found the. And Atmospheric Sciences issued on a link to a particular forecast day will lead to the in! To learn more about CDM forecasts to 7 pm EST or 8 pm.! Pathogen being present at multiple starting heights of the page list of pathogen. 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