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I have had good results using chlorothalonil (Daconil.) 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. Even if you don’t see any issues, spraying a fungicide right now, like Daconil, could save your tree in the long run. New growth becomes infected during the regular growing season, but symptoms don't show until late winter and early spring. “You have to catch it early. Similarities and differences between the two diseases exist. |  ©2018 GARDENTECH, INC. All trademarks are the property of their respective owners. Needle cast is hard to get rid of, but if do as Max suggested, there is hope! The innermost needles on the lowest branches are often affected most, as spores from fallen needles left on the ground re-infect branches above. Crowded, wet conditions promote these diseases. Ryan, I get Daconil at … Needle cast diseases are typically controlled by chlorothalonil (Daconil, Bravo, etc). Wind and water spread needlecast-spawning fungi. Needlecast Identification/Symptoms: Needlecast symptoms vary depending on the type of tree and the specific fungi involved. Lots of people love the look of a blue spruce. Common Diseases of Tomato, Pepper, Eggplant and Potato. 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. Always rake and dispose of needles that fall to the ground. Rhizosphaeara needle cast is one of the most common fungal diseases of Colorado blue spruce. This disease is most common in trees growing outside of their native range, like our lovely blue spruce, which is native to Colorado. Start treatments when new growths comes out and add another treatment in August which seems to help also.”. 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. New needles remain green, while old needles turn brown on a spruce infected with Rhizosphaera needlecast Plant disease tolerant trees. Infected needles typically develop yellow or brown spots, and spring may also bring shades of purple or red. You'll help prevent reinfections from cast leaves. Tip of the Week: If you have a Blue Spruce, Daconil is your friend! So what can you do to protect your blue spruce? Another key characteristic of needl… For more Home and Garden tips check out the highlights from our last show! Click here to see if you’re tree is in jeopardy. “You have to catch it early. If you look at some of the infected needles that fall you’ll see black fungal. The key is catching the needle cast early and treating right away, says friend of the show, Arborist Max Bigelow. Shows » Home & Garden » Tip of the Week: If you have a Blue Spruce, Daconil is your friend! Once treatments begin, reapply Daconil ® fungicide every three to four weeks until dry weather stabilizes. I have had good results using chlorothalonil (Daconil.) Needle casting disease of spruce is currently managed with fungicides after the new growth has expanded to 0.5 to 2.0 inches in length, typically in May. However, severe loss of needles often signals diseases such as needlecast at work. 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. The biggest problem we often get asked about is needle cast. What is Rhizosphaera needle cast? During the spring, we’ll spray the tree with a copper-containing fungicide designed to keep the rhizosphaera fungus from spreading. Only the newest, current year's growth stays green, as needles on branches become sparse and thin. Spray to cover all needle and branch surfaces until thoroughly wet. It can make Colorado blue spruce unsightly and unusable in many landscape settings. GardenTech is a registered trademark of Gulfstream Home and Garden, Inc. Daconil is a registered trademark of GB Biosciences Corp. USDA Forest Service, Northern and Intermountain Region, USDA Forest Service, Bugwood.org (CC BY 3.0 US), USDA Forest Service - Ogden, USDA Forest Service, Bugwood.org (CC BY 3.0 US), Joseph O'Brien, USDA Forest Service, Bugwood.org (CC BY 3.0 US), Photo credit: USDA Forest Service, USDA Forest Service, Bugwood.org (CC BY 3.0 US), Terry S. Price, Georgia Forestry Commission, Bugwood.org (CC BY 3.0 US), Frantisek Soukup, Bugwood.org (CC BY 3.0 US). 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. 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! The magnificent color of the silver-blue-green needles truly makes this evergreen an American favorite. Thank you, Penny 810-394-0896 Symptoms of both needle cast diseases look similar to each other. Also known as rhizosphaera, needle cast, infects new growth during the growing season. Needlecast Tips: Space evergreens to allow for good air circulation, so needles dry well. Bayleton (triadimefon), Cleary’s 3336 (thiophanate methyl), and Banner Maxx (propiconazole) are … It is NOT a systemic (that is, it does not enter the plant). 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/ Safari/537. Notice the discoloration, the uneven browning of the needles, and the the green/yellow/red banding, especially in the green parts of the needle. Treating Rhizosphaera Needle Cast should always be done by a professional arborist. Needlecast diseases caused by fungal pathogens such Lophodermium, Rhabdocline, and Rhizosphaera cause these conifers to cast off large amounts of needles prematurely. Close examination of infected, dropped needles may show rows of shiny, raised, black fungal spots.

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