Strawberry leaf diseases: descriptions with photos, treatment
Fragrant strawberries are a favorite and very fruitful berry. From some varieties, you can collect fruits several times a season, from late spring to autumn cooling. But all kinds of diseases can destroy the entire bush or even the whole plantation. Many of them first appear on the leaves, so be careful!
Pimples and tubercles on the leaves
Due to some fungal lesions, spots may gradually swell and mound. Still pimples leave insects that literally lay eggs.
- Aphids willingly settle on the leaves of strawberries on the reverse side and breed whole colonies. It is because of it that bumps most often appear that scare beginners;
- Small tubercles with brown spots leave behind thrips, which eat all parts of the plant;
- If the tubercles are more likely to resemble tumors and cover the entire bush of strawberries - this is probably bacterial cancer. Alas, it is incurable, so damaged plants need to be disposed of sooner.
Leaves turn yellow and dry
There is no reason for concern if the leaves begin to turn yellow at the end of the season because it is their biological cycle. But if the problem appears in the spring or in the midst of summer - you need to urgently act.
- With improper watering, strawberry leaves dry on hot days or turn yellow and rot in too wet;
- Strawberry leaves turn yellow, wither and wither due to Fusarium. The fungus is able to completely destroy the plant in about a month and a half;
- Strawberry leaves dry when damaged by gray rot, which most often manifests itself during fruiting. Berries in just a couple of days are covered with gray moldy down;
- With a lack of iron or magnesium, the leaves turn yellow and dry from the tips. Sometimes the problem is a deficiency of zinc or manganese, but it is difficult to establish for sure, therefore it is recommended to always use complex nutrition;
- On too hot days, strawberry leaves may also begin to dry out. In order not to accidentally flood the plantation, we recommend that you consider shelter and shade;
- If the sun is not enough, the leaves will turn yellow in the same way, because the process of photosynthesis directly depends on the amount of light;
- When all the conditions are exactly in order, and the leaves still languish along with the shoots - perhaps this is a verticillum wilting;
- Chaotic yellow spots, strokes and stripes that are intertwined in complex patterns - a symptom of an incurable viral mosaic.
Brown spots on strawberry leaves
In contrast to yellow spots, red and brown are alarming almost immediately. And not in vain, because most likely the reason is in fungi or bacteria, although maybe strawberries simply do not have enough nutrition.
- Anthracnose leaves brown spots with a white center, which rapidly progresses in warm spring days. Then these spots can crack and crack;
- Red and rusty spots are a sign of fungal rust, which also loves warm and humid weather;
- The leaves wither and become brown from the bottom up when affected by late blight. The disease affects the root system and, first and foremost, young or weak shoots die;
- The leaves turn red, darken and soften when they begin to rot. Most often this is a banal overflow, so you need to establish a regime and dry the ground;
- When affected by black rot, brown spots on the leaves are combined with black spots on the shoots.
Strawberry leaves turn black
Garden plants are pretty hardy, and even delicate strawberries are no exception. Therefore, if the leaves have already begun to literally blacken and die - this may be a sign of an advanced disease.
- Young bushes turn black due to serious damage to the root system, so always carefully select the seed;
- Sometimes strawberries begin to blacken with an acute deficiency of potassium;
- When the root system rots, the leaves suffer in the rather late stages of the problem. It is already difficult to save such a strawberry, so we recommend periodically inspecting the basal necks;
- Black coating on the leaves - it can be a sooty fungus, which often leaves aphids;
- Necrotic spots on strawberry leaves appear in the last stages of alternariosis. But it begins with gray-brown spots and a change in the texture of the plate;
- Small black dots on top of large red spots occur with black spotting. They gradually stretch and become oval.
Fragrant strawberries attract a lot of pests, including larvae and caterpillars. They most often leave holes on the leaves, because they just eat the flesh.
- Raspberry-strawberry weevil eats not only leaves, but also buds with flowers of berry crops;
- A larger and brighter nettle-leaf weevil eats leaves along the edges, because of what they seem openwork;
- It is difficult to consider a small strawberry leaf beetle, but a gluttonous bug quickly eats up all the flesh, except for the shell of a strawberry leaf;
- With white spotting, the leaves are covered with white spots with a brown or purple border. Then the bright middle of the spots begins to die and fall out.
White plaque on strawberry leaves
Sometimes a velvety white coating that covers the sheet plates looks like it is easy to erase with a finger. We strongly do not recommend touching it at all, because these are fungal spores.
- The main reason for the velvet white coating is powdery mildew, which is able to affect all garden crops without exception;
- On wet days, downy mildew with similar symptoms and the same treatment also spreads with pleasure;
- White rot is another fungus that leaves soft white fluff and most often affects strawberries with strawberries;
- A small whitish cobweb, which braids leaves and shoots, is left by spider mites. Small black bugs most often hide at the base of leaf plates.
Pale and light leaves
Old leaves can lighten, because the plant's resources go to the crop and young shoots. But if the problem is massive and unexpected - something is definitely going wrong!
- Leaves weaken and fade if the strawberry does not have enough sun or the planting was too thick;
- At the stage of active recruitment of green mass, nitrogen must be added, because strawberries may not have enough nutrients in the soil;
- Deficiency of complete complex top dressing also badly affects the deciduous mass.
Strawberry leaves twist
If the leaves curl from dryness or pests - this is a purely mechanical problem. The situation stabilizes after the cause has been eliminated, but it will not work with dangerous viruses and pathologies!
- Inside the twisted leaves, leaflets pupate. They roll them up and glue them with their cobwebs;
- The twist virus is poorly understood and manifests itself differently in different cultures. Unfortunately, strawberries are also subject to it periodically;
- If the plantation is too dense and there is not enough space between the bushes, the leaves curl because they are simply choking;
- Different types of deformation also indicate a lack of useful components - magnesium, phosphorus, molybdenum, zinc. Always use complex fertilizers in accordance with the schedule and dosages.