2024 Author: Howard Calhoun | [email protected]. Last modified: 2023-12-17 10:16
Any gardener is faced with such a thing as leaf chlorosis. Plant disease manifests itself in unnatural (out-of-season) yellowing and leaf fall. The cause of the disease lies in the violation of the formation of chlorophyll, which means a decrease in the activity of photosynthesis. In this case, the leaves may lose color not only completely, but also partially, and new (young) shoots and leaves noticeably become smaller. The edges of the leaf blades are often twisted, the resulting buds (on flowers) are deformed. Shoot tips are either very weak or shriveled.
Leaf chlorosis can be infectious (infection of other plants is possible) and non-infectious (occurring in violation of agricultural practices). Consider chlorosis in more detail.
For starters - leaf chlorosis (photo of infected plants), where vine bushes are an example:
Infectious chlorosis of grape leaves
Growers call it "leaf spot" and "yellow mosaic". Refers to viral diseases of infectious degeneration. For the vine, the disease poses a very serious danger (leaf curling, viral short knot, plant death). Bushes exposed to viral chlorosis become yellow-lemon. The veins of the leaves, in contrast to the usual chlorosis, become discolored. With a short node, the size of the internodes is significantly reduced, the leaves become smaller, and the formation of stepchildren increases significantly. With a mosaic, grape leaves, discolored along with the veins, wrinkle and wrap (twist).
Control measures, prevention
The infected plant is immediately uprooted, the soil is pickled with dichloroethane (vat residues). A careful selection of planting material can prevent the occurrence and spread of chlorosis (the vine that is planned to be planted in the future is harvested from absolutely he althy and strong bushes). For planting vineyards, choose areas free from nematodes, which are the main carriers of the virus. Areas that have previously experienced outbreaks of virus-like diseases are recommended to be sown with cereals (up to six consecutive years), which nematodes do not feed on.
Common chlorosis (non-infectious)
Somewhat different from infectious. Here, too, yellowing of the leaves is observed, but the veins remain green. At the same time, the overall growth of the plant is noticeably inhibited, at the same time quite abundant shoots appear (mainly the lower parts of the bush). The reason for the appearance of non-infectious chlorosis lies in the disturbed metabolism of the plant, associated with excess moisture, a large amount of lime, an alkaline reaction of the soil, but more often with a lack of iron.
Control measures, prevention
With an excess of lime, ammonium sulphate is added (3 kg under a grape bush). Inoculations are recommended for rootstocks that are resistant to calcareous soil (41-B Chassla on Berlandieri has proven itself the most). Excess moisture can be de alt with by deep digging (excess water evaporates faster). If rainfall is high in your area, look for varieties that are resistant to chlorosis initially.
Additionally recommended:
- autumn introduction of vitriol into the soil (directly under the bush, 500 grams);
- spraying with vitriol (0.5%) in the spring, during the growing season (instead of vitriol, iron chelate can be used, which is even better);
- introduction of complex dressings (micro-, macro-) containing manganese, iron, zinc.
Recommended:
Unstructured management: description of the concept, methods and methods
General description of the concept of structureless methods of managing people. How do they differ from the structural way of manipulation. Description of various methods and methods of unstructured management of society. Managing other people through leaders. Bringing illustrative examples of such management
Grass weeds: names, photos, methods of struggle
When growing cereal crops, priority is given to increasing their yield. However, even ordinary grass can cause its decline, so weed grass should be disposed of. In order for weed control to be effective, you must first familiarize yourself with their types and characteristics
Alexandrian leaf - an effective remedy for many diseases
Alexandrian leaf or, as it is called differently, senna leaf, has long been used to treat many human diseases
Bas alt cylinders: description, production methods, application, photo
Bas alt cylinders are used for thermal insulation of industrial and domestic pipelines. Since it is based on an environmentally friendly material, it can be used in all types of industries, including food. The premises where the insulation will be used can have any purpose
Leaves turn yellow on cucumbers: causes and methods of struggle
Cucumber leaves turn yellow with a lack of trace elements, disease (bacteriosis, downy mildew) and pests (aphids and spider mites)
