Dry nursery is a breeding method commonly used in rice production, but it is the most troublesome thing for grain farmers in the actual operation. Because blight is a disease that occurs most frequently in the production of dry nursery and is most likely to cause devastating disasters. It is a contagious disease caused by fungi. The occurrence of this disease eventually causes the grain farmers to reduce the number of seedlings, reduce the quality, and even all die, affecting rice production. First, the cause of the blight is the cause and symptoms of blight. There are three main causes of blight. First, the seed is infected with bacteria or trampoline, and the seed or bed soil is not completely disinfected, which leads to the occurrence of blight. Second, the temperature is low, the sowing is early, the seedlings are weak, and it is easy to be infected with blight; the third is the soil alkalinity. The pH value is greater than 6.5, and it is not suitable for acid adjustment or acid adjustment. It is most likely to cause the growth of Pythium, thereby infecting the seedlings and causing blight. The main symptoms of blight are: after emergence, the seedlings are withered, easily pulled off, the base of the stem is rotted, and there is a rotten pear flavor, which is dead in pieces. Most of the base of the diseased plant has red mold. Second, prevention measures 1, seed treatment. Use 46% of the enemy 30 grams of water 15 kg, stir well and then dip 12 kg of rice seeds, soak for 5 days at room temperature, stir once a day; use 10% soaking spirit 5 ml or 35% carbendazim 100 ml to water 25 kg, soaking seeds for 5-7 days, stirring once a day; using 50% Fumei double wettable powder 50 g, mixing 10 kg of rice seeds, have better disinfection effect. 2. Soil disinfection. Soil disinfection is an indispensable and important measure in the work of dry nursery. In the case of preparation, use 70% dikesone 2.5 g of rice per square meter before sowing, and spray disinfection into 600 times. On the trampoline, after sowing the fine soil, use 70% dikesone per square meter, disinfect the 600 times liquid spray, and pour the water once after each spray to make the liquid fully fused with the soil. In order to kill the bacteria in the soil. In addition, you can also use 70% dikesone 2.5g per square meter, mix 7.5kg of fine soil and mix it with the farmyard manure on the seedbed, then mix it with the 10cm thick layer of the bed, mix well, Soaked in clear water and sowed. 3. Soil acidification. The optimum soil pH for dry nursery is 4.5-5.5. Peracid and alkali are not conducive to the growth and development of seedling roots. If the pH value of the trampoline soil is greater than 6.5, it should be acidified. The method of acid adjustment is usually to apply acid pickled water 2 days before sowing to adjust the acid; or 50 grams of industrial sulfuric acid per square meter. Mix 200 times of water and spray evenly on the seedbed. If the pH is too high, increase the amount of dilute sulfuric acid solution. Then mix the pears with the topsoil to finally bring the soil pH to the desired range. In order to avoid or reduce the acid adjustment process, the soil should be selected when selecting the soil. If the conditions are not fully available, as long as the soil pH is between 4.0 and 6.5, the soil pH can be raised normally. The soil pH value in the test is within this range. The difference in growth of the seedlings is not obvious. 4, chemical control. Blight disease still needs to be controlled with chemicals, and the prevention and treatment time is 12-15 days after sowing. This prevention period cannot be advanced or postponed. The application of this period is very important for the prevention and treatment of blight. The application method is as follows: 1 g of 70% dixon plus 5 kg of soil or fine sand per square meter of trampoline, mix evenly and sprinkle on a trampoline, and pour 1 time of water. In the management of Otaru, if you also find blight, use 1.5 grams of 70% dikesone to spray 600 times per square meter, or 20% methyl chlorhexate 50ml to 40 kilograms of water spray at 80 square meters. Square meter trampoline.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Our Bolt Clipper And Cutter are served to cut off various cable wire ropes, more fast, convenient and all are very light.
Our chain wire clipper possesses the item number of 16271 and the weight of 5kg. It is desirable for cutting off the aluminum conductor steel-reinforced with its specification of LGJ400 or below.
High Strength Hydraulic Hand Crew Cutter and Nut Splitter
Notes: For cutting rusty nut, packaged in plastic box.
Item number Applicable nut Maximum force (kN) Length(mm) Weight (kg) Remark
16292 M12-M24 100 500 5.5 Hydraulic style
Specifications
Item number Applicable conductor Length (mm) Weight (kg)
16271 ≤ACSR400 ≤GJ95 720 5
Bolt Clipper And Cutter
Bolt Clipper,Bolt Cutter,Electric Wire Clipper,Electric Wire Shear,Pliers And Shears,Hydraulic Cutter
NINGBO MARSHINE POWER TECHNOLOGY CO., LTD. , http://www.marshine-power.com