Correct Use of Atrazine Herbicide

Atrazine can be used in corn fields. In areas where soil organic matter content is 1%-2%, use 150-200 g of 50% wettable powder per mu, or 175-200 mL of 40% suspension concentrate; in areas where soil organic matter content is greater than 3%-6%, use 200-250 g of 50% wettable powder per mu, or 200-250 g of 40% suspension concentrate. After corn emerges, use 200-250 g of 50% wettable powder or 40% suspension concentrate per mu in sandy soil. In corn and winter wheat continuous cropping areas, atrazine can be used at reduced rates in combination with herbicides such as cyanazine, alachlor, and chlortoluron.

Atrazine is a systemic selective pre-emergence and post-emergence closed herbicide. It is absorbed mainly through the roots, with very little absorption through stems and leaves. Its weed-killing action and selectivity are the same as simazine. It is easily leached by rainwater into deeper soil layers and is also effective against some deep-rooted weeds, but it easily causes phytotoxicity. Its residual period is also relatively long.

Atrazine is a pre-emergence soil treatment herbicide, and can also be used for post-emergence stem and leaf treatment. During use, drought has a relatively large impact on its efficacy. It acts mainly on dicotyledonous plants, with emphasis on closed treatment, and its effect on large weeds is relatively unsatisfactory.

It has a relatively broad weed-killing spectrum and can control many annual grass and broadleaf weeds. It is suitable for dryland crops such as corn, sorghum, sugarcane, fruit trees, nurseries, and forest land, controlling crabgrass, barnyardgrass, foxtail, sedge, shortawn foxtail, smartweed, goosefoot, cruciferous and leguminous weeds, and is especially selective for corn (because corn has a detoxification mechanism), and also has a certain inhibitory effect on some perennial weeds.