I've found that it affects all my own plants in containers and can be the devil to get rid of, especially in lawns. It’s also pretty easy to spot once you know what you’re looking for. I have a standard bay growing in a tub, but recently it has developed a few yellow leaves. I think that this is a leaf problem rather than one of nutrition. You can also apply the fungicides chlorothalonil or thiophanate-methyl. It’s an organic spray but, if possible, spray in the evening to avoid harming any beneficial insects in your garden. For larger infestation dip a cloth in rubbing alcohol and wipe the affected leaves or stems. I was given two agapanthus plants, 'Blue Giant' and 'Silver Baby', two years ago. Ya see, scale doesn’t move. Posts. If you are impatient try Summer or All Season horticultural oil (it doesn't contain lime sulfur) now, although it may be already too late to control scale insects. This sounds like Oxalis corniculata, or creeping wood sorrel, which has little yellow flowers and bronze foliage. Aphids attack: Spray magnolia with water via a hosepipe will help, My sister has a magnolia whose leaves are turning yellow and are covered in a white sticky stuff. Sadly it has been badly infected with Hydrangea scale. Part of the Daily Mail, The Mail on Sunday & Metro Media Group. Scale insects can be incredibly frustrating and difficult to manage. Does Resolva Bug Killer kill scale insects?I can't see a specific reference to Scale Insects on the label, and it isn't one of the suggested products on the RHS page. Why not be the first to send us your thoughts, Each of these pests leaves distinct signs on a hydrangea, so diagnosing the pest problem is simple. What am i doing wrong?Allen West, Abertillery, Gwent. Hydrangeas are gorgeous. or debate this issue live on our message boards. It may be that this is a sucker from the rootstock. I would like to cut back the branches of my Indian bean tree (the light green variety), but as the leaves only grow at the end, will it then be devoid of foliage for ever?Mrs Lynda Spreckley, Chippenham, Wilts. You are doing nothing wrong. After treating, spray thoroughly with a diluted alcohol solution. They also need to have their roots tightly restrained for good flowering. YOU ARE HERE Pest Watch > Scale insect control. However, a liquid seaweed solution fed once a fortnight will encourage healthy root growth and equip the plant to grow healthy new foliage. In a lawn, it is best to vigorously scratch the turf with a wire rake over the coming three or four weeks, which will remove much of the sorrel. A great shame but felt that was the best thing to do as I don't want other plants to become affected by this scale. Look out for barren hydrangeas if you live in an area with a lot of deer! What is wrong with the plant and how can it be saved? There is also some black on the leaves. Watering without getting the leaves wet will help to prevent these diseases. How do i deal with this fungus?Mrs J Cole, Basildon, Essex. Also said to change topsoil afterwards to get them away from the plant. i have been invaded by a plant with shamrock-like leaves and white, carrot-like roots. Get rid of all the heavily spotted or dead leaves and dispose of them. Knowledge is knowing that a tomato is a fruit. If your friend's laburnum was a grafted variety then the shoot that you took ten years ago could well be from the rootstock and therefore not the same variety. This is the flea beetle, which makes characteristic tiny holes - not always right through the leaf - which causes scarring and coarsening of the foliage. If you see scale on any of your houseplants and the infection is confined to a single branch, you can cut off that branch and dispose of it. I have Scale on one of three hydrangea plants in pots. Log in or register to join the conversation. I have tried to keep the top soil clean but may consider changing this. Since it works perfectly for me I recommend it for you to use at the end of the dormant season. All these are fine until May. These scales tend to be harder to spot on plants, and can be hard to treat. My apples, and the leaves, are covered in black marks. Follow the info on the package how to use it. Spray a deer repellant onto hydrangeas to drive away pests. Gray mold or Botrytis blight has found a way of sneaking into the plant's sheltered environment. If your hydrangeas do get infected, you have several options, including compost tea, hydrogen peroxide, garlic oil, or liquid kelp. In the winter I brushed them off with an old shoe brush then sprayed the tree with Vitax Winter Wash - the tree has been fine since. Prune the tree to remove any crowded or crossing branches, so good airflow can move through it. What am i doing wrong? 2. I have chosen questions which represent a cross-section of the most common queries that I have been receiving lately.Â, My hydrangea's leaves and stems are covered in white spores the size of matchheads. Agapanthus are shy to flower if the summer temperatures remain low. The adult does the damage, which hatches from larvae that live in the soil and hatch in mid spring - hence the early crops are untouched. There are many predators that you can buy or attract in the garden. So far we have had no flowers on the white one and the blue only flowered once, last year. And, unless the situation is dire, they usually don’t show up in huge numbers. I'm afraid this is another effect of our recent wet summers. How you plant and maintain hydrangeas play a role in how susceptible to mold they are. Does not get rid of all of them but seems to have allowed the plant to recover slightly. [email protected] and I will answer a selection each week on these pages. Last year it was affected as well but it recovered. If you want to get rid of them once and for all, you may have to change your potting mix, i.e., repot. it has beautiful long flowering racemes, but only on part of the tree. I have to correct my above post - Resolva does kill scale insects.Have you sprayed this time of year and done a couple of treatments then tried blasting with a hose? This year the infection is much worse, the sap is going from the leaves which are covered in the white sticky blobs, the stems have darkened and have the white blobs all down them and it seems at the moment I will only have two flowers on the plant. Disturbed and the absorbed liquid helps generate more froth the pot was standing for the last years! Two years ago ) gets covered with tiny holes the bark to dehydrate and die have tried to the. For protection 5 the fall, they usually don’t show up in huge numbers good will! 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