It is impossible to imagine a kitchen without onions Housewives. Let his tears flow like water, newly many dishes the vegetables is essential. Therefore, on private plots onions are grown everywhere. It is planted either in the winter or spring. Onions grow well. Rarely is naughty and shows dissatisfaction. But on a serious problem signals. Often, yellowing of the pen.
What to do if the onion turns yellow?
It all depends on the season. If the bow started to turn yellow in June, for example, then it's bad. A plant that is not happy. Either someone wound up in the garden. We need to understand why yellow feather from Luca and take action. If this happens at the end of July, the reasons for concern. The crop began to ripen. Will soon be removed.
Why do onions turn yellow leaves?
The cause of the problem: there's a pest in the soil lacks nitrogen, the plant lacks moisture. Rescue activities will depend on the specific cause.
As a rule, the plant gets damaged by the fly and scriptomania.Onion fly
The symptoms of its presence: the feathers turn yellow and fade early in the bulb can be used to detect the larva, vegetable rot, and the plant pulled out of the ground very easily, even accidentally while weeding.Orientation on the pest:1.
The size of the adult is about seven millimeters. Body yellowish gray with dark stripes rare.2.
The larva is a white worm with a konusopodobnyh spikes on the end. It can be seen in the bulb or in soil around the plant.
Pupae of flies overwinter in the soil. In the spring the pupa Wake up. Egg laying coincides with the blooming of dandelions. After a week the larvae. They make their way into the bulb and eat it.Protective measures:
- Deep digging of the soil before sowing;
- early planting;
- the door to the carrots, the smell of which repels flies;
- destruction of infected plants;
- sprinkling the earth around the onion ash mixed with tobacco dust;
- cleaning from the beds of each crop.
Very dangerous pest, which eats away the feathers inside. Signs of infestation: the leaves – white spots and longitudinal stripes, the yellow tips of the feathers, twisting and drying the pen. For young plantings threat as the adults and larvae.How to recognize a pest?1.
The adult beetle is a small insect with a length of up to two millimeters. Body covered with light scales. Legs and elytra brownish. At the base of the elytra there is a bright stripe.2.
Larva – light worms with dark head.
Krutogorniy overwinter in the ground, grass, shrubs or unharvested onions. They eat in the spring, gradually moving into fresh planting. The female gnaws a pen bow and lays eggs there. Two weeks later the larvae. They eat the internal contents of the feathers and then down into the soil to pupate.Protective measures:
The lack of nitrogen in the soil
- timely cleaning of plant residues;
- sowing on the ridges remote from landings of the previous year;
- regular hoeing between rows;
- cutting the damaged feathers plus loosening.
It can be observed as dry days and rainy. Nitrogen is absorbed in solute form, and so need moisture. At the same time after heavy rainfall nitrogen compounds go too deep, where the roots of plants cannot absorb.
To compensate for the nitrogen deficiency, onions periodically fertilize with nitrate, ammonium sulphate, urea or slurry.The lack of moisture
In the period of active growth and gaining strength a bow needs regular watering.Here are a few recommendations:
The salvation of the pen:
- asthenia watering before weeding and after them;
- pour water in the grooves made between the green bushes;
- in dense plantings, when you have to throw the feathers, use a watering can to keep the water washed away the soil around the bulbs;
- the need for watering check with your finger; if the depth of the nail the soil is dry, you need watering;
- six weeks before harvesting, stop watering.
Consider a few popular methods of combating problem. That is, the recipes that allow you to immediately eliminate several reasons.1.
Ten litres of warm water dissolve half a Cup of salt and one ampoule of ammonia. Add three emenike ash. This composition to water every ten days. As long as the feathers again spring.2.
Planting material is soaked in strong potassium permanganate and planted in rows, sprinkle with salt.3.
In half a bucket of water – half a tablespoon of iodine, two bags of potassium permanganate and five hundred grams of soda. This concentrated formula. It need to dissolve in water in a ratio of 1:10. And diluted to water.4.
Waking the aisle with sand mixed with naphthalene.5.
Pour onion salt water with potassium permanganate.published
Private eco house made from Adobe: an unusual and importantHow to get rid of garbage in the country
P. S. And remember, just changing your mind — together we change the world! ©