Easy to growcommon lilacpleases us in spring with its flowers and their strong scent. Sometimes, however, like any other plant, it can succumb to pathogens. No flowers orbrown, twisted lilac leavesmay be symptoms oflilac diseaseor pest infestation. Find out about the most common reasons why your lilac lost its charm. Seewhy it doesn't bloom without lilacand how to deal with this situation. Here are proven ways to deal with pests andLilac disease
Lilac diseases - bacteriosis
Lilac diseases - bacteriosis
Bacteriosis is aLilac lilac diseasewhich causesleaves to turn brown and curlWatery round or irregular patches can cover the entire gill leafy. Unlignified shoots sometimes become blotchy, if the necrosis covers the entire circumference of the shoot, it begins to die and its top and leaves bend.
Lilac bacteriosiscan also be the reason whydoes not bloom without lilacAs a result of infection with this disease, flower buds may not develop at all or die shortly after flowering. During rainfall, the bacteria infect neighboring plants through small wounds on the shoots. In the event of symptoms of lilac bacteriosis, it is important to remove diseased shoots and apply 2-3 sprayings every 7-10 days with Miedzian 50 WP or Biosept Active.
Lilac lilac diseases - verticillium wilt
Werticilioza isLilac lilac disease , which develops in the substrate and infects the root system of the shrub. Symptoms of the disease are visible in summer, when the leaves on the elderberry begin to turn yellow, wilt, turn brown and fall prematurely. Infested without lilac blooms less. If we notice symptoms of verticillium disease, we must cut out the sick shoots and spray them with Topsin M 500 SC. It is also worth preparing a solution of this agent and watering a sick bush with it in the amount of 4 liters per 1 m2 of soil.
Lilac lilac diseases - ascochytosis
"Symptoms of lilac disease , which is ascochytosis, are brown spots on shoots and inflorescence stalks at the beginning of the growing season. Infectedlilac leaves turn brown and twist , but do not fall, but remain on the plant hanging downwards. With high air humidity and frequent rainfall, a white fungus with numerous spores can be seen on the leaf surface. At the end of summer, brown, round spots appear on the leaves, surrounded by a border.These spots increase in size and cover a significant area of the leaf. If you notice symptoms, you must not water the plants directly on the leaves, because the spores are transferred to other neighboring plants in the drops of water. Infected shoots should be removed and sprayed 3-4 times every 7-10 days using Topsin M 500 SC or Dithane NeoTec 75 WG. To reduce the use of chemicals, you can use Biosept Active in every second spraying.All lilac diseases mentioned here
can be preventedby regular pruning of the lilac bushes as soon as the plant is blooming. Thanks to the cutting, we protect the bush from excessive density, provide light to the inside of its crown and stimulate abundant flowering next year. "
Lilac lilac pests
Twisted lilac leavesmay be a symptom of lilac pests feeding. One of them is therose tortoiseIt causes the characteristiclilac leaves to curlalong their major kidneys.The presence of a leaf roll is characteristic of many ornamental and fruit plants. The control of the tortoise shell consists in removing mechanically the eggs laid on the shoots or spraying the bush in May during the hatching of the caterpillars with Fastac 100 EC. Another common lilac pest is lilaclilac stainAs a result of feeding larvae and adults, the edges of the leaf blade begin to curl inward, and the leaf tip on the underside begins to silver. Karate Zeon 050 EC should be sprayed at the beginning of the growing season, when the larvae begin to spread to the underside of the leaf.
MSc Eng. Joanna Białowąs
