What could be the problem of browning on autumn blaze maple?

by Shirley
My seven year old autumn blaze maple tree has browning areas on the leaves for the second year. Leaves come out yellowy, not a rich green and now the brown areas are showing up on the leaves. Last year there was a lot of brown leaves and they never turned red orange in the fall like they did previously.
  6 answers
  • Arlene Fitzpatrick Arlene Fitzpatrick on Jun 15, 2015
    was it planted too deep or with the burlap left as is? If so, it may just be showing it's problems Yellow leaves sometimes means it needs to be sprayed with a fungicide -- you could check with a good nursery locally -- take some leaves in with you - just to make sure Good luck
  • Carole Carole on Jun 16, 2015
    This pale color where the background is yellow and the veining is darker is typical of iron-deficiency, or watering with water that has a high pH (try test the water with testers for aquarium, they are cheap) and accumulates in the soil changing its pH also or it could come from the tree roots being exposed to herbicides/pesticides. Maby, many pesticides will give the combined symptoms of pale leaves, edges getting brown and dry (like "bruned") or same "burned" spots,, very often leaves will get "weak" and fall of outside of season or in exccessive amoounts. These types of pesticides are used on purpose in may orchards exactly for that same purpose, have the laves fall off and increase the efficiency of fruit picking (for manual picing as well as for machines). These pesticides are derived from the same type of chemicals as Agent Orange and are widely used in agriculture. Check whether your townhall/authorities responsible for maintenance spray agains weeds on the strees and whether the symtpoms happe, after they passed by, or are other plants affected. If not, the tree definitely would benefit from iron, (the pale and inverted greens) the question is what else is it having deficiency of? A nursery will help you or a soli analysis, sometimes you can get a do-it-yourself it, take a sample yourself and send , the price is not too heavy. For iron deficiency, you can use iron tablets from the drugstore, I know people using old iron nails etc.. I don't like to do it myself and prefer to use iron tablets, as then when I garden (or my dogs play) I'll never know if they can get hurt. You can also buy cheap iron for plans at nurseries etc.. (but it comes in fairly huge containers)
  • CAB CAB on Jun 17, 2015
    Could be aphids or another bug. Usually a systemic treatment works for these critters.
  • Carla Carla on Jun 17, 2015
    maybe too much sun.Help answer this question...
  • Carole Carole on Jun 17, 2015
    Hi Shirley, I came back with some links check this out, http://utahpests.usu.edu/ipm/htm/advisories/landscape/articleID=8317 and see photos , you'll se exactly what you have on your tree:+ text describing the effects of iron deficiency (given that iron deficiency worsens the effects of lack of water, for further understanding pls go to the page) , here's a quote from them: " plants suffering from severe iron deficiency (amur maple) are more susceptible to leaf scorch" http://utahpests.usu.edu/IPM/htm/ornamentals/landscape-insects-and-diseases/iron-chlorosis/ This compares iron deficiency (chlorosis) to damage from pesticides, because they do ressemble a lot; Further , here"s about water-induced nutrient deficiencies (beyond iron): http://www.hortiholic.com/2013_07_01_archive.html. P.S. In my region water ground water) which we use to water with is very, very high in pH (alcaline).In the spring, where we still have rain, plants thrive and have green leaves but throughout the summer drought while watering is needed, plant leaves become pale like yours, look weak, stay small, this is chlorosis induced by the quality of the ground water (tap water is not used and would be too expensive). To give you an idea, I live 5 miles or even less from the Perrier source, wherefrom the Perrier was originally bottled (now the source is dried out and the Perrier water is produced industrially), but the groundwater is the same, highly alcaline (like water + baking soda into it) and the plants hate it. Start checking the water's pH with sticks used for monitoring aquarium fish's water, you'll surely find out the explanation is in the pH or have the soil analysed for iron.