Sorghum is also one of the crops often planted by farmers. In the process of sorghum growth, we will choose different ways to protect sorghum from other factors, including the use of sorghum-specific herbicides. Let's take a look at what we need to pay attention to when using sorghum herbicides.
(1) Soil treatment before sowing
Chemical weeding from post-emergence to pre-emergence is a method of weeding by time difference selection method. It is sprayed with herbicides before seedlings are unearthed after sorghum seeds are planted, and weeds germinate early, and will die quickly after treatment. purpose. The methods of chemical weeding used in high sorghum fields before and after sowing are:
(1) 25% green mellon wettable powder, 200 g-300 g per 667 square meters, 50 kg water, evenly sprayed on the soil surface.
(2) 25% green mellon wettable powder, 150 grams per 667 square meters, add 50% chlorpyrifos EC 150mL, or add 60% butachlor EC 50mL, water 45kg-50kg, spray soil surface.
(3) 80% herbicide ether (also known as Maodu, Carboxymethyl Herbicidal) wettable powder, 75-120 grams per 667 square meters, 35kg-40kg water, sprayed soil surface. In case of drought, it can be shallow 2cm-3cm, so that the liquid is mixed with the soil, increasing the chance of contact with weeds and young grasses, and improving the herbicidal effect.
(4) 72% metolachlor EC, 100mL-150mL per 667 square meters, about 35kg water, spray the soil surface; or use 72% metolachlor EC 75mL, plus 40% atrazine 100 mL of the suspension was sprayed with 35 kg of water.
(5) 50% Ligulong wettable powder 150g-200g, 40kg water, evenly sprayed the soil surface.
(6) 50% chlorhexidine WP WP 200g - 300g, 40kg water, evenly spray the soil surface.
(7) 48% paraquats, 25mL-40mL per 667 square meters, 35kg water, or 20mL-30mL plus 40% atrazine suspension 150mL-200mL, or 48% alachlor (also known as cable) EC 200mL-300mL, 35kg water, spray soil surface.
(8) 40% simazine capsule suspension 200mL-300mL, 40kg water, evenly sprayed soil surface. Note that this medicine has a long period of validity. It is not advisable to arrange crops such as wheat, rapeseed, and soybeans after the crops are cropped. When the corn is harvested according to corn and sugar cane, the dosage can be increased to 500 mL.
(2) Stem and leaf treatment in seedling stage
Chemical weeding in seedling stage is the use of herbicides in the metabolism of crops and weeds in different biochemical processes to achieve the goal of eliminating grass and seedlings. After 5-8 leaf stage of sorghum emergence, the drug resistance is strong. It is safer to use chemical herbicides, and it is sensitive to herbicides before and after 5 leaves. Therefore, chemical weeding at seedling stage is generally carried out at 5-8 leaf stage. Otherwise, It is easy to produce phytotoxicity. The sorghum chemical weeding is mostly treated with soil before sowing, and it is generally not suitable to spray herbicides at the seedling stage. If the seedling stage is seriously damaged by grass, the spraying time, concentration and variety should be strictly controlled. Commonly used chemical weeding methods at seedling stage are:
(1) 72% 2,4-D butyl ester emulsifiable concentrate, 40mL-65mL per 667 square meters, about 35kg water, in the 4-5 leaf stage after sorghum emergence, evenly spray the weed stems and leaves, mainly to prevent broadleaf Grass and sedge weeds are not effective against grass weeds.
(2) 40% atrazine gel suspension, 200mL-250mL per 667 square meters, 35kg water, in the sorghum 4-5 leaf stage, evenly spray the weed stems and leaves. It can control single, dicotyledonous weeds and deep-rooted weeds.
(3) 20% dimethyltetrachloride aqueous solution, mixed with 100mL and 48% paraquat water agent 12.5mL per 667 square meters, 35kg water, 4-5 leaf stage after sorghum emergence, evenly spray weed stems and leaves.
It is particularly important to emphasize that sorghum is very sensitive to chemicals. When using it, it must be strictly controlled by the type, time, concentration and method of the drug. Otherwise, it may cause phytotoxicity. If it is the first time to use chemical herbicides, lack of experience, we must first do a small area of ​​weeding test, and then promote the experience after the experience, so as not to cause irreparable loss of production. Huinong School has more relevant agricultural technology knowledge, and continue to pay attention to the Huinong School to answer questions during the planting process.
Copyright Tip: Hui Nongwang platform respects and protects intellectual property rights. If you find copyright problems in the platform articles, please contact us and handle them in time.
Disclaimer: Some of the content is reproduced from other media. The purpose of the reprint is to convey more information. It does not mean that the Hui Nongwang platform agrees with its views and is responsible for its authenticity.
Other Medical Consumables,Medical Equipment,Medical Equipment Consumables,Medical Consumable Products
Shandong Zhushi Pharmaceutical Group Co.,LTD , https://www.sdzs-medical.com