Plant protection is an important branch of agricultural science. She is developing methods for controlling diseases, pests and numerous weeds, as well as the consequences of their action. As you know, in this fight, one of the measures is the use of a large number of different chemicals, including fungicides.
These substances can be systemic or local action. The latter practically do not penetrate into the plants, but remain on their surface and prevent infection with fungal diseases. Pathogens die by contact with such substances, so the drugs are called contact, for example: “Kuprozan”, “Tsineb”, “Khometsin”, “Bordeaux liquid”, “HOM” (a preparation of copper chloroxide), “Sulfur colloidal”. The protective effect of these drugs decreases with partial washing off during rainfall, but still remains.
Appointment "HOM"
HOM is a drug well known to gardeners. They have long successfully used it to protect vegetable and berry crops. Copper chloride is used to combat peronosporosis onions and cucumbers, late blight of potatoes and tomatoes, various diseases of ornamental crops and flowers.
For the treatment of curly leaves in peaches, scabs of apple trees and pears also use the drug "HOM". Gardeners' reviews confirm its high effectiveness against mildew grapes and decayed plums. Moreover, copper at one time was perhaps the most suitable means of combating this disease of the sun berry, as well as the cheapest until organic fungicides containing copper appeared.
The drug "HOM": instructions for use
Copper Chloride is a crystalline powder of a bluish-green color, odorless. This is a full-fledged substitute for Bordeaux mixture, but in contrast to it, “HOM” is a more convenient and ready-to-use preparation. The yield of the mixture is only in its ability to stay on the leaves.
It is very simple to prepare a working solution: first, the HOM product is diluted in a small amount of water, after which, while stirring constantly, add liquid to the required volume. Processing plants should be carried out in clear weather without wind with an air temperature of not more than +30 0 , while trying to uniformly wet the surface of the leaves. All prepared solution should be used in one day.
All cultures are sprayed
during the growing season, except for ornamental plants, they should be processed before and after flowering. In order for the working solution to linger better on plants, skim milk can be added to it in an amount of 1% of the total volume.
The period of the protective action of the fungicide lasts from 10 to 14 days, while the resistance of pathogens to copper oxychloride does not occur.
"HOM" is an environmentally friendly preparation, for a short time by soil microorganisms it decomposes completely to the simplest substances, leaving no traces of chemistry. To prevent the accumulation of the active substance in the fruits, the treatment with drugs is stopped 20 days before harvest. For grapes, this period increases to 30 days.
Security measures
The drug "HOM" - a substance belonging to the third hazard class, medium toxic to humans and animals. For bees, it also poses some danger, so plants should not be sprayed during flowering. Honey workers must be isolated for 5-6 hours before and after processing crops. Work on spraying plants is carried out in overalls, after their completion you need to change clothes, wash your face and hands with soap. Eating and water, as well as smoking during spraying are not allowed. For most crops, the drug is not phytotoxic, but in some plants, with high humidity, it can cause burns on leaves and a brown net on the fruits, so the maximum effect of HOM is achieved in areas with dry summers.