Both European and American boxwoods are susceptible to boxwood mite. Bookmark. The Two Main Culprits Absent a hobo who lives in your bushes and regularly relieves himself on their foliage, the probable cause of brown boxwoods is one of two soil-borne diseases -- Phytophthora root rot or English boxwood decline.The first attacks American boxwood (Buxus sempervirens), English boxwood (B. sempervirens 'Suffruticosa'), and littleleaf boxwood (B. I have tried soapy water with a little vinegar, and neem oil. About a year in we got this awful white looking stuff on the leaves. insularis (Korean boxwood), B colchica and Pachysandra are susceptible. What's That Fuzzy Stuff on My Tree? This is a mealybug infestation. japonica (Japanese boxwood), B. sinica var. Succulents often have a whitish powdery coating or film on their leaves. Eurytetranychus buxi is a spider mite – the boxwood mite to be exact. See photos I’ve tried spraying it and also cutting it back. This is a beneficial wax that protects against water loss, sunburn and insects. The boxwood psyllid (Psylla buxi) is the most common insect pest of Buxus sempervirens but all boxwoods are susceptible.They are found most often in the temperate parts of the United States but occur wherever boxwoods are grown in this country. Long distance spread of the pathogen is through the movement of infected nursery material. I have two boxwoods in the front of my house, it gets plenty of sun, not too much watering. However, as the fungal growth spreads, the white stuff can cover the entire plant. … Joe Post #6846622. Learn to recognize the difference between this epicuticular wax and powdery mildew or whiteflies, for the health of your succulent plants. These boxwood shrub pests feed on the underside of the leaves, leaving them stippled with tiny white or yellow spots. I'm looking for some identification and how to get rid of these. Buxus sempervirens, B. microphylla (littleleaf boxwood) and var. Japanese boxwood is a bit more resistant. We have many large boxwoods on our property that have this "dander" type of white stuff which is covering the leaves and flying through the air. Answer: You don't have a fungal problem on your succulent. White bush fungus is a very descriptive term and a pretty good guess for what ails your hedge. Please can you help me. I have never noticed this on my boxwood before, but the tips of them this spring are a very light yellow, almost white. It is spreading. Any help is appreciated! Those dots are the bodies of the woolly aphids. It appears that privet is the shrub in question and it … These insects feed on your plant and create this white fluffy looking stuff on your plant. Remove and destroy severely affected plants. You can take steps to prevent and remedy white fungus on lilac bushes. I'm a flower person, not a shrub expert, so thought maybe someone else might know. If you discover a white powdery fungus marring the surface of your lilac leaves as you are admiring the blooming lilacs, you probably react with horror and dismay. The trees don't seem to be harmed at this point. I have some boxwood bushes with white dots/bugs all over them (see image). Does anyone know what this is? Take heart--the white powder you see is mildew and, while it is unsightly, it will not harm your lilac bushes. Last year it almost killed one of the bushes, luckily it came back. Thanks. From a distance, a woolly aphid colony can appear to be a fuzz or moldy growth on a tree branch. Is it normal spring growth and I just never noticed it before? Quote. The fungal disease creates a powdery white growth on plant leaves and stems. It looks seems to have white fine threads on it. Looking at a woolly aphid colony from above, you see tiny black dots amongst the fuzzy, white, cottony substance. Someone has suggested that they are aphids - could this be the case? 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