Honeybees had discovered my caller's blue spruce pollen and was afraid of them for both her and her kids. This product is what I need to help prevent fungus and blight on my winter gem box woods. Check out the MSU Landscape and Nursery Management Certificate Program! These fruiting bodies are producing the spores that will infect the new needles as they break bud. of Fung-onil Multi Purpose Fungicide Concentrate per gallon of water for tomatoes. Again, if you apply fungicides for needle cast disease, we ask you to make one of those applications one month after your first application. You can see all of the usage rates by reading the product label. Norway and Meyer spruce appears to show some tolerance to these needle cast diseases. I had that on 62 Blue Spruce trees and followed the direction. It's a great product to use in alternate treatment with Cleary. Excludes Alaska, Hawaii, Puerto Rico, and all other U.S. territories. However, in some plantations needle casting symptoms still occur after sprays (Photos 1 and 2). Dr. Fulbright's work is funded in part by MSU's AgBioResearch. Well-timed sprays in the spring will normally suppress Rhizosphaera to non-detectable levels in the population of trees. Sign into your account to receive your members only Savings. 68 of 82 people found this answer helpful. The key to successfully managing this disease requires that you protect new growth as … ), and it often suffers from environmental stresses such as drought, excessive heat, humidity, and compacted or heavy clay soils—making it an already poor choice for our landscape. Linda: Rhizosphaera needlecast does very well during wet years. Severely infected trees may hold only the current year's needles; whereas, a healthy spruce will retain needles 5 to 7 years. Do not apply closer to harvest than the indicated Preharvest Interval (PHI) for each type of crop. March 26, 2010. Editor’s note: This article is from the archives of the MSU Crop Advisory Team Alerts. 15 of 17 people found this review helpful. You will find the application directions on the label of the chemical. We still do not know for sure if this fungus is completely responsible for these symptoms after spraying for Rhizosphaera. To avoid disease epidemics it is advised to plant a diverse selection of trees, rather than planting 1 or 2 species. Just thrilled! Availability: Normally ships in 1 business day. Thank you to this representative and Do My Own. Do not apply more than the specified amount of this product per 200 sq. For more information, visit https://extension.msu.edu. Spruce, especially Colorado blue Spruce, are at risk for Rhizosphaera needle cast. Jeffrey W. Dwyer, Director, MSU Extension, East Lansing, MI 48824. Reference to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned. The magnificent color of the silver-blue-green needles truly makes this evergreen an American favorite. For more information go to https://www.P65Warnings.ca.gov. A protective fungicide with the active ingredient chlorothalonil (sold as Multi- Purpose Fungicide, Daconil 2787, and others), Two-some, Spectro-90, or copper based fungicide can protect new growth and prevent new infections. Check the label of any pesticide referenced to ensure your use is included. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Fungicides should be available at local nurseries, garden supply stores, or feed stores. Answer: Thank you for contacting us regarding your tree issues. It is imperative that you treat the entire tree next spring with the chlorothalonil fungicide just after bud break and before needles are half elongated. It is dying up the middle. Diagnostics . Apply this at the rate indicated for each garden crop for the disease to be controlled, by mixing in one gallon of water to cover approximately 200 square feet (10 ft. x 20 ft.) of planted crop. 10 of 11 people found this review helpful. Are the mixing directions available online? Consult our list of recommended trees in Minnesota, and talk to … The link above has some spruce diseases that chlorothalonil is used to treat. Signs of needle cast include needle shedding and black spots on the needles of the blue spruce. Blue spruce tree infected with Rhizosphaera needle cast exhibiting defoliation and branch dieback ... 100 gal water) or fungicides containing chlorothalonil or thiophanate methyl. We have also noticed that Stigmina this new needle infecting fungus is frequently found on the north side of the trees, in high density plantings, and on wet ground. The label on my bottle has been destroyed by water. I explained to the caller that any poison applied would only affect the bees on the tree at that moment, and that constant application would be required over a period of over 21 days to be the least bit effective, and that the poison itself could be harmful to her young boys. Severely infected tree showing the ‘purple-brown’ needle symptoms. WARNING: This product can expose you to chemicals including Chlorothalonil, which is know to the State of California to cause cancer. Readily mixes with water and best applied with a tank type sprayer. Blue spruce varieties are very susceptible to Rhizosphaera. The casting needles turn purple or brown, die and drop off the stems (Photo 3). Norway spruce is more resistant but we’re even seeing some of those trees being impacted. diseases of Colorado blue spruce. ... Chlorothalonil-based fungicides may discolor spruce needles.

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