The high temperature and rainy weather in summer, coupled with the weak resistance of new species of leeks, plants are vulnerable to pests and weeds, resulting in dead trees. The vegetable grower must strengthen the management in all aspects and cultivate the strong vegetables.
Leeks were unearthed 10 to 15 days after sowing. A friend said with distress that he did not fight herbicides. The grass was thicker than the seedlings and came out earlier than the seedlings. Some people were anxious. When they saw the grass, they couldn't wait to pick up the sprayer to fight paraquat. This is a feasible solution, as long as they are optimistic that the leek is not outcrop, and we can achieve the effect of weeding according to half the dose of the instructions, but the risk factor is large. Someone also enters the ground and scratches gently, but it is easy to damage the sprouting seedlings.
In fact, when the leeks are all seedlings, they can be easily weeded when sprayed with herbicide when they grow to look like leeks. Select leek special herbicides or leguminous herbicides can be, according to the situation of weeds in their own leeks.
The leek must be watered when it comes to drought when it comes out of the ground. How to judge whether there is water shortage? When the leek is unearthed, it is a bow-shaped linear leaf. If we see that the bow-shaped leaf bounces normally, the leek does not lack water. If the leek's bow-shaped leaves do not come out and gradually yellow, it is water shortage. Irrigate it once in a timely manner. When irrigating, be careful not to flush the ground directly with the water pipe, and you must take measures to relieve the pressure of the water directly onto the leek seedlings, cover some firewood, reduce the pressure of the water flow, and avoid damaging the seedlings.
Summer leeks are susceptible to stem blight and damping-off. Stem blight: At the beginning of the onset of stems, chlorotic oblong lesions appear, all of which turn grayish white and dense black spots. The incidence of leaves, leaf spots on both sides of the spindle-shaped or long oval, the edge is not clear, after the small black spots, severe dead leaves, flower stems folded. Farmers should strengthen the field management of leek gardens, with 40% chlorothalonil suspension 500 times solution or 70% mancozeb WP wettablet 500 times and other spray control. 40% chlorothalonil suspension 500 times, 70% mancozeb WP wettablet 500 times and other targeted drugs for prevention and treatment.
Physiosis: After the seeds germinate, the cotyledons and embryos rot and cause rotten species. After the cotyledons were unfolded, the lesions on the base of the diseased seedlings developed water-spotted lesions, which then turned yellow-brown and curled up into a linear pattern. The seedlings were not allowed to stand erect. The other appearances of seedlings were the same as those of healthy seedlings. Spray control as early as possible after onset, available 75% chlorothalonil wettable powder 600 times, 64% antitoxic WP 500 times, 70% mancozeb WP 500 times or 70% enemy powder 1000 times liquid spray, alternate medication, spray every 7 to 10 days, even spray 2 to 3 times.
Insect pests are mainly locusts and mantle. Aphids can not be overlooked, in the event of 25% imidacloprid EC 20% spray spray. Application of pesticides is timely, accurate, detailed and uniform.
Earthworms can be applied on the ground. During the period of adult occurrence of the mantle, use 2.5% of trichlorphon powder per acre for 2 to 2.6 kg, or spray 90% of phoxim EC at 1000 times for 9 to 11 am. Can also be poured enough water to urge the pests to rise, spray 70% ciprofloxacin 6 to 10 grams per mu. Diligent application of plant ash or biogas slurry can effectively kill the mantle. Can also be used to control the root of Bacillus thuringiensis.
Food additives are compounds or natural substances added to food for the purpose of improving the color, aroma, and taste of food, as well as for the needs of anti-corrosion and processing technology. At present, there are 23 categories of food additives, with more than 2,000 varieties, including acidity regulators, anticaking agents, defoamers, antioxidants, bleaching agents, leavening agents, coloring agents, color retention agents, enzyme preparations, and flavor enhancers, nutritional fortifiers, preservatives, Sweeteners, thickeners, spices, etc.
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