Rust Spots on Leaves > Identify, Control & Diesease Prevention Tips

Rust Spots on Leaves

The emergence of spots is always connected with a pest attack or the consequences of launched disease processes. Also, the brown color of such spots points to rust caused by a group of fungi from the Pucciniales family. The unusually-looking spots and growths of unnatural orange, yellow, and brown shades located on leaves signalize the disease. For the development of these pathogens, high humidity that causes long-term wetting of the leaves is a must. Fungal rust is the most common cause of leaf spots, although there are others as well. Alternatively, rusty spots indicate a lack or excess of phosphorus, nitrogen, boron, copper, iron, magnesium, potassium, etc.

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Signs of damage

Rust on the leaves manifests itself in the form of randomly placed orange-yellow to red spots on the surface.
First of all, rounded spots resembling rust gradually appear on the upper part of the leaves during summer;
Spots increase in size until brown or yellow growths appear on leaves, similarly growing in size;
Leaves do not grow to normal size;
Leaves fall extremely early.

How to prevent

Do not let the leaves remain wet for an extended period, and ensure you always normalize the humidity of the growing environment. If you closely look at the leaves of plants you cultivate and take necessary measures to timely address the disease; then your plant can lose just a few leaves. When you have just discovered the signs of disease, get rid of rust as soon as possible so that it does not start to provoke an immunity decrease. For this purpose, remove the infected parts, such as leaves, shoots, and branches at 2-4 in (5-10 cm) of the affected area or fruits. Cut off all the parts bearing even the smallest spots or growths.

Heal

To broaden the methods of combating the rust spots, the most effective of all is the removal of affected leaves, the creation of drier conditions, changes in the composition and condition of the soil, and the use of chemical spraying. Fungicide for processing and spraying Bordeaux mixture with copper sulfate successfully disinfects plants. Prepare the solution before use, choose a dry day, and treat all the above-ground organs. Although many other compounds help with leaf rust, Bordeaux solution is the most used and has already proven its suitability for treating diverse plant infections.

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