Give the trees their first application when the new spring buds begin elongating, advises Tisserat. I would like your opinion on these injections. Apparently they cannot be sprayed effectively because of their height. Make a fungicide solution by infusing 3 ounces of minced garlic in 1 ounce of mineral oil for at least 24 hours. I live in South California and decide to have palm trees.…I had several attacks on 3 of my 12 palm trees but finally with this fungicide and a lot of showers (twice a day during the summer), I win! These two insect pests look similar, so accurate identification requires a close look. It has a dense, upright profile, a little narrower than other blue spruce trees, and the vibrant blue-green color of the needles is remarkable for its intensity and richness. Why does the Daconil Ultrex Turf Care Fungicide label say not to use on blue spruce? Blue spruce in Michigan suffers from a serious needle casting disease caused by the fungus Rhizosphaera. Tree service recommends systemic injections. Use this beautiful tree as a specimen in a lawn. My property is in Lakewood, Colorado. If you want the best blue spruce to grace your lawn or garden, every expert agrees this is the one you want. Dying branches (branch dieback) or branches that are shedding needles are common symptoms of Colorado blue spruce trees and often attributed to either of two insect pests: aphids or the Cooley spruce gall adelgid. Find out what environmental conditions and diseases may be affecting your blue spruce and when replacing it is the best option. However, spruce trees, like all plants, are also susceptible to attack by pathogens and arthropods, and they can suffer from environmental stress and other ‘non-contagious’ factors. Spray a second time in 10 to 14 days. Spruce trees often thrive in North Dakota under the right conditions. Mix with a gallon of water and a dash of mild soap. I have several very large healthy spruce trees which I have been treating for IPS beetle and tussock moth. The blue spruce is a beautiful tree, but is susceptible to many diseases. Where … Does ImidaPro 2SC kill Blue Spruce bug worms? Mix the solution thoroughly and continuously throughout application. What is the best treatment for my Blue Spruce which has developed Rhizosphaera Needle Cast? This year, cool spring temperatures and wet conditions favor development of needle cast diseases on spruce. Observing new shoot development of pine trees is essential to time your systemic fungicide application properly. Why can't I … Plant it to finish the corners of your garden. What do you recommend to treat rhizosphaera needle cast on blue spruce trees in Michigan? Is Fertilome Over the Top II Grass Killer safe for Christmas trees? However, in some plantations needle casting symptoms still occur after sprays (Photos 1 and 2). Spray the tree including the undersides of … Well-timed sprays in the spring will normally suppress Rhizosphaera to non-detectable levels in the population of trees. A translocating fungicide can reach the tree's roots and new tissues, while protective fungicides can't. Applying Systemic Fungicide. My palms trees are still very healthy and did not suffer of the daily fungicide sprays.