Every year, many gardeners are faced with the fact that the yellow onion pen.If time does not take action, we can remain without harvest.This is especially troubling people who grow onion in large quantities for sale.To choose a way to get rid of this trouble, you need to determine why the yellow feather bow.Incorrectly chosen method does not help to save the harvest, much of which can be lost.
So why yellow feather bow?There are three main reasons that lead to this.Two of them are connected with the work of pests.This is the onion and onion skrytnohobotnike fly.How to determine who spoils bow?It is necessary to carefully examine the damaged plant.
skrytnohobotnika larvae are eating inside the onion feathers long longitudinal passages like whitish streaks.And the adults eat away the hole around which as the drying of the sheet formed white spots.As a result of these pests onion pen tips turn yellow, curl and pen itself shrinks.Winter beetles can spend retracted onions or topsoil.Therefore it is recommended to destroy the remains of onions.If possible, move every year to 200-300 meters onion crops to bug them to get there.If the bow is already affected by the pest, cut off the feathers, leaving only 3-4 cm. Most of loose soil, including between rows.
Why yellow feather at the bow?The reason may be onion fly.From it can also suffer and garlic.If the bow is populated by larvae, it is too early to begin to turn yellow and wither.This damages the onion fly and bulbs, which then rot and plants are easily pulled from the ground.As we see the signs of a threat is different, so you can diagnose from what it would have to get rid of.In this case, we can recommend an early crop of onions, destruction of plants which are already damaged, deep plowing.Sow carrots next to onions, your plants will ward off the smell of each other pests.Do not place on the site of plant residues.You can sprinkle with onion ash beds, mahorochnoy or tobacco dust.On the basis of national experience can advise watering the onion brine (1 cup a bucket of water) three times, with an interval of 20 days.
Why yellow feather onions if no signs of pests?The most common cause is the lack of nitrogen.Heavy rain can lead to nitrogen compounds that go along with the water in the lower layers of soil from which they can not control the onion roots.Therefore it is recommended to feed the bow nitrogen fertilizers.
Now we know enough to determine the true reason why the yellow feather bow.If the feathers are no beetle larvae and flies in the bulbs, is to fertilize the beds nitrogenous fertilizers.And do not forget that the end of July due to the yellowing of the feathers of the natural aging process of plants.When the onion has become yellow only in that period, to take some measures are not necessary.The main thing - to recognize the adverse symptoms and the cause of their appearance, to harvest success.
