In the production of green onions, the headache for growers is that maggots occur in the process of growing onions, and once they are harmed by ground maggots, the light ones reduce the harvest, and the heavy ones basically cancel the harvest. But there are also some growers who can prevent the occurrence of maggots very well, and their practice is as follows.
<h1 class= "pgc-h-arrow-right" > reasonable stubble</h1>
The plot for planting onions should be selected as the stubble of grasses and leguminous crops, but it cannot be a plot of garlic, leeks and ginger, let alone a land with heavy stubble. Because these plots leave a source of maggots, it is conducive to recurrence and outbreak. Stubble cutting off the source of insects is a good way to fundamentally eliminate maggots.
< h1 class= "pgc-h-arrow-right" > the organic fertilizer used should be fully decomposed</h1>
Organic fertilizer to do the bottom fertilizer or topdressing, must be through high temperature stacking, fully decomposed, can be used, because the maggots like the odor of unleavened rotten organic matter, there is a tendency to taste. Farmers often say that "raw manure and maggots" is for this reason. Therefore, organic fertilizer must be stacked at high temperatures before it can be applied.
<h1 class= "pgc-h-arrow-right" > dried roots after transplanting</h1>
In order to reduce the onion seedlings with insect eggs, do not rush to seal the soil and water the roots for 2 to 3 days after the onion seedlings colonize the field, and then seal the soil for watering, and the irradiation of the sun can reduce the killing of some larvae and eggs. In addition, through the sunning of the roots, it also plays a role in controlling prosperity and promoting strength, promoting the early planting of new roots, laying the foundation for the growth of green onions and seedlings in the future.
<h1 class = "pgc-h-arrow-right" > drug control</h1>
In order to completely control maggots to use drugs according to the situation, there are many suitable drugs, mainly soil spray, irrigation, flushing and other methods, the following introduces some simple flushing methods, select 25% thiazine, per acre dosage of 200 grams for small water flood irrigation.
Soil treatment can also be carried out with 1 to 2 kg of 2% imidacloprid grains. The method is to mix the medicine with 100 kg of fine soil and spread it or strip it.
<h1 class = "pgc-h-arrow-right" > grass and wood ash control</h1>
Once the green onion is found to be yellow, it is necessary to open the soil in time to check, if maggots occur, directly sprinkle grass and wood ash on the root of the green onion, the amount per mu is 20 to 30 kg, and it can also be used to leach the liquid root with 1 to 5 grass and wood ash. The method is to soak 1 part of grass and wood ash with 5 parts of water for 24 hours, take the leaching solution and use it. This method can not only treat insects, but also play a role in applying potassium fertilizer to green onions.
<h1 class = "pgc-h-arrow-right" > irrigation control</h1>
Maggots like to be dry and afraid of wetness, and can also be killed once by flood irrigation when they occur.
In short, when maggots occur onions, it is necessary to take comprehensive control measures, try not to apply pesticides or less pesticides, and take the road of green agriculture.