I apply this every one-two weeks from early June to August on all my two needle pines and haven't seen any adverse affects. Spray to cover all needle and branch surfaces until thoroughly wet. This means that rainfall will wash it off, requiring that it be reapplied. You'll help prevent reinfections from cast leaves. Needle cast diseases are typically controlled by chlorothalonil (Daconil, Bravo, etc). Always rake and dispose of needles that fall to the ground. Also known as rhizosphaera, needle cast, infects new growth during the growing season. Common Diseases of Tomato, Pepper, Eggplant and Potato. Bayleton (triadimefon), Cleary’s 3336 (thiophanate methyl), and Banner Maxx (propiconazole) are … The magnificent color of the silver-blue-green needles truly makes this evergreen an American favorite. The classic symptoms of needle cast include brownish purple discoloration and eventual death of older needles, while current-year needles show no symptoms (Figure 1). Daconil® Fungicide Concentrate from GardenTech® brand offers highly effective protection against diseases such as Lophodermium needlecast in pine, Douglas fir, and spruce; Rhabdocline and Swiss needlecast in Douglas fir; and Rhizosphaera needlecast in spruce. Thanks Mike for that clarification. Needle cast is hard to get rid of, but if do as Max suggested, there is hope! Two needle cast diseases occur in North Dakota: Rhizosphaera needle cast and Stigmina needle cast. Start treatments when new growths comes out and add another treatment in August which seems to help also.”. Shows » Home & Garden » Tip of the Week: If you have a Blue Spruce, Daconil is your friend! Thank you, Penny 810-394-0896 Similarities and differences between the two diseases exist. This statement is not based on a scientific survey but on personal observation and an increase in spruce samples positive for Rhizosphaera at the Plant Clinic. But it has its place because it is more effective than most of the systemic fungicides on the market. In the Northeast and Northcentral states, start spraying for Lophodermium needlecast in mid-July and early August. If you look at some of the infected needles that fall you’ll see black fungal. However, you may not notice your tree has it until late winter or early spring. Used with a hand-held, hose-end, or tank-style sprayer, Daconil® Concentrate treats these needled evergreens easily and economically. This disease is most common in trees growing outside of their native range, like our lovely blue spruce, which is native to Colorado. This Ponderosa Pine has Needle Cast, a fungus. It can make Colorado blue spruce unsightly and unusable in many landscape settings. During the spring, we’ll spray the tree with a copper-containing fungicide designed to keep the rhizosphaera fungus from spreading. Needles will look yellow or get odd colored spots. Brian Hudelson, UW-Madison Plant Pathology Revised: 11/8/2018 Item number: XHT1006. Rhizosphaera needle cast is a fungal disease, caused by Rhizosphaera kalkhoffii that attacks the needles of Colorado blue spruce in the spring, as new needles emerge. The biggest problem we often get asked about is needle cast. In the Northeast and Northcentral states, start spraying for Lophodermium needlecast in mid-July and early August. Remove heavily infested trees, and prune out infected branches. Click here to see if you’re tree is in jeopardy. Always read product labels thoroughly and follow instructions, including guidelines for treatable plants, application rates, and frequencies. Tip of the Week: If you have a Blue Spruce, Daconil is your friend! I will try out the plain old red bottle Daconil I got at Lowes on one isolated branch just to see whether it does any damage. However, severe loss of needles often signals diseases such as needlecast at work. However, infected needles often don’t show symptoms right away, and may take one to three years to develop. |  ©2018 GARDENTECH, INC. All trademarks are the property of their respective owners. Click here to see if you’re tree is in jeopardy, Changes Brought On By Pandemic Has High School Swim Team Practicing Outside, Indy Mayor Joe Hogsett Tests Negative For Coronavirus, Mega Millions, Powerball Jackpots Both Over $200 Million. Rhizosphaeara needle cast is one of the most common fungal diseases of Colorado blue spruce. New needles remain green, while old needles turn brown on a spruce infected with Rhizosphaera needlecast Plant disease tolerant trees. Once treatments begin, reapply Daconil® fungicide every three to four weeks until dry weather stabilizes. Measure the recommended concentrate amount with the convenient measuring cap. New growth becomes infected during the regular growing season, but symptoms don't show until late winter and early spring. Must be some nasty stuff. Even if you don’t see any issues, spraying a fungicide right now, like Daconil, could save your tree in the long run. My plan is to apply 4 doses of Daconil spread 3 wks a part. Pour it into your sprayer, add the recommended amount of water, and mix well. Even though they're called evergreens, trees such as pine, Douglas fir, and spruce naturally lose some of their needled leaves each year. Begin needlecast treatments in spring when new needles are 1/2–2 inches long. https://omny.fm/shows/home-garden/home-and-garden-show-5-23-20, Join us LIVE every Saturday, 9 am-1 pm, right here on WIBC, Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 UBrowser/7.0.185.1002 Safari/537. How to Control Needlecast: Because needlecast infections happen long before symptoms appear, effective control calls for proactive, preventive treatments. Needlecast Identification/Symptoms: Needlecast symptoms vary depending on the type of tree and the specific fungi involved. Ryan, I get Daconil at … Do not plant Colorado blue spruce (Picea pungens) or other spruce that are not well adapted to the environmental conditions in your area.Plant Norway (P. abies) or white spruce (P. glauca) as they are more resistant to Rhizosphaera needle cast. “You have to catch it early. Be sure to keep special attention to your tree, especially this time of year. Begin needlecast treatments in spring when new needles are 1/2–2 inches long. Lots of people love the look of a blue spruce. Infected needles typically develop yellow or brown spots, and spring may also bring shades of purple or red. Start treatments when new growths comes out and add another treatment in August which seems to help also.” Needle cast is hard to get rid of, but if do as Max suggested, there is hope! For more Home and Garden tips check out the highlights from our last show! 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