The wreckers who have appeared in the greenhouse oppress growth and development of plants. They cause big loss to harvest. It is important to recognize and destroy the wrecker in time, and it is better to prevent its emergence.
Instruction
1. From family of pumpkin vegetables the cucumber is the most widespread culture. Cucumbers have great taste both in fresh, and in tinned look. It is difficult to provide kitchen garden without cucumbers, they are grown up in numerous areas it is not dependent on weather conditions. Now huge number of grades and hybrids with the increased productivity is removed. Receiving rich harvest depends not only on grade or on the correct execution of all agrotechnical actions for cultivation of cucumbers. At emergence of adverse conditions there can be wreckers and diseases which work great mischief and reduce productivity. For prevention of appearance of diseases and wreckers hold number of events for protection of plants.
2. Plant louse – small green or black insect about two millimeters in size. Lives on bottom side of leaf, big colonies. Eats plant juice why sheet plates are twisted, turn yellow and perish. The plant louse causes big loss to productivity and can destroy all plants completely. Development of larvae begins on weed plants. After the wintering, at air warming up over 5 degrees, wreckers make habitable weed. Breeding with high speed, larvae, killing one plant behind another, fly on next in search of food, having viral infections. In July, cucumbers – great delicacy for melon plant louse expand, she, flying on cucumber culture, instantly forms colony similar. Fight measures: 1. Processing of the greenhouse and soil the medicine "Carbophos", "Metofos" before crops of cucumbers.2. Weeding of weeds in the nearby territory. 3. Cultivation of ladybugs who wish to regale smolder.4. Processing by infusion of tobacco or ashes with addition of the Onions Infusion laundry soap.5. with garlic or burning pepper.6. Chemical medicines "Fitoverm", "Aktofit", "Bitoksibatsillin".7. Introduction of phosphorus-potassium fertilizers.
3. The web tick damages cucumbers in the conditions of hothouse cultivation. Makes habitable leaf rear side, punctures with proboscis epidermichesky layer of sheet plate and exhausts juice from cells of internal fabrics. On leaf slightly noticeable web appears, it becomes covered by light dots therefore grows brown and dries up. The tick is capable to kill completely plants. Fight measures: 1. Autumn removal in the greenhouse of the vegetable remains and disinfection by smoke grenades.2. Increase in air humidity in the greenhouse (up to 80%). 3. Chemical medicines "Fitoverm".
4. Gallic nematode – the wrecker worm-shaped, one and a half millimeter in size. Gets into fabrics of root system and conducts destructive activity. Toxic releases of waste product of nematode cause formation of outgrowths and swellings Contents of outgrowths fill larvae. The damaged plant is oppressed in growth and perishes. Fight measures: 1. To arrange winter freezing of soil in the greenhouse.2. Soil processing steam before crops.3. Removal of the infected soil.4. Increase in fertility of the soil.5. Disinfecting of tools.6. Quality sowing material. For prevention of emergence of wreckers and causative agents of diseases one of the main receptions is observance of crop rotation.