{"id":1351,"date":"2026-05-18T19:55:50","date_gmt":"2026-05-18T11:55:50","guid":{"rendered":"https:\/\/www.fulltsing.cn\/product\/%e5%90%a1%e5%98%a7%e7%a3%ba%e9%9a%86\/"},"modified":"2026-05-21T13:33:27","modified_gmt":"2026-05-21T05:33:27","slug":"%e5%90%a1%e5%98%a7%e7%a3%ba%e9%9a%86","status":"publish","type":"product","link":"https:\/\/www.fulltsing.cn\/en\/product\/%e5%90%a1%e5%98%a7%e7%a3%ba%e9%9a%86\/","title":{"rendered":"Pyrazosulfuron 20% WP"},"content":{"rendered":"

Pyrazosulfuron 20% WP<\/strong><\/h2>\n

Pyrazosulfuron-ethyl 20% WP<\/strong><\/h3>\n
Pesticide Category:<\/strong> Herbicides Dosage form:<\/strong> Wettable Powder (WP) | Toxicity:<\/strong> lower toxicity
\nCAS number:<\/strong> 93697-74-6 | Chemical Name:<\/strong> Ethyl 5-(4,6-dimethoxypyrimidin-2-ylcarbamoylsulfonyl)-1-methylpyrazole-4-carboxylate<\/div>\n
\n

I. Product Profile<\/h3>\n
\n

Pyrimidylsulfuron 20% Wettable Powder is aHighly effective, selective, systemic herbicide for rice fields<\/strong>, a sulfonylurea herbicide. This product is primarily absorbed through the root system, rapidly translocates within the weed plant, inhibits growth, and causes the weeds to gradually die. It provides excellent control of annual and perennial broadleaf weeds and Cyperaceae weeds in rice fields, making it a classic product for controlling broadleaf and Cyperaceae weeds in rice fields. Compared to the traditional 10% formulation, the high-concentration formulation (20%) requires a lower application rate and delivers more consistent efficacy.<\/p>\n

<\/div>\n<\/div>\n
\n

II. Mechanisms of action of active ingredients<\/h3>\n

Target: Acetyl-L-lactate synthase (ALS) inhibitor<\/strong><\/h4>\n
Pyrimidylsulfuron belongs toHRAC Class B \/ WSSA Class 2<\/strong>Herbicides with a mechanism of action:<\/div>\n
\n
\n
\n

forms<\/span><\/p>\n

<\/div>\n
<\/div>\n<\/div>\n<\/header>\n
\n\n\n\n\n\n\n\n\n
active link<\/th>\nSpecific mechanisms<\/th>\n<\/tr>\n<\/thead>\n
absorption pathway<\/strong><\/td>\nMainly throughRoots Absorbed<\/strong>, and is rapidly transported within the weed plants<\/p>\n
<\/div>\n<\/td>\n<\/tr>\n
biochemical target<\/strong><\/td>\nInhibiting the activity of acetyl-L-lactate synthase (ALS)<\/strong>, inhibiting the synthesis of branched-chain amino acids<\/td>\n<\/tr>\n
physiological effect<\/strong><\/td>\nInhibits the biosynthesis of valine, leucine, and isoleucine, and prevents cell division<\/td>\n<\/tr>\n
final performance<\/strong><\/td>\nWeed growth is stunted, and the plants gradually turn yellow and die.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

selectivity principle (physics)<\/strong><\/h4>\n
    \n
  • \n
    Rice can break down this pesticide, which has virtually no effect on rice growth.<\/div>\n<\/li>\n
  • \n
    Stable efficacy, high safety, and long-lasting effect25\u201335 days<\/strong><\/div>\n<\/li>\n
  • \n
    \n

    It degrades relatively quickly in the soil and is safe for subsequent crops.<\/p>\n

    <\/div>\n<\/div>\n<\/li>\n<\/ul>\n
    \n

    III. Product characteristics<\/h3>\n

    \u2705\u00a0Six Core Advantages<\/strong><\/h4>\n
    \n
    \n
    \n

    forms<\/span><\/p>\n

    <\/div>\n
    <\/div>\n<\/div>\n<\/header>\n
    \n\n\n\n\n\n\n\n\n\n\n
    Specificities<\/th>\nparticular<\/th>\n<\/tr>\n<\/thead>\n
    \ud83c\udfaf Specialized in Kosa, with a wide range of target plants<\/strong><\/td>\nProvides excellent control of annual and perennial broadleaf weeds and sedge weeds<\/td>\n<\/tr>\n
    \ud83d\udd04 Systemic action, thoroughly eradicates<\/strong><\/td>\nOnce absorbed by the root system, the herbicide is rapidly transported throughout the plant, destroying weeds from the inside out, with no regrowth.<\/td>\n<\/tr>\n
    \u23f1\ufe0f Long-lasting, one application lasts<\/strong><\/td>\nEffective for 25\u201335 days; a single application is sufficient to control weeds during the seedling stage of rice.<\/td>\n<\/tr>\n
    \ud83d\udee1\ufe0f Safe for rice, suitable for subsequent crops<\/strong><\/td>\nIt is safe for rice, degrades rapidly in the soil, and is safe for subsequent crops<\/td>\n<\/tr>\n
    \ud83d\udca7 High-content formula saves labor and money<\/strong><\/td>\n20% High-Concentration Wettable Powder: Low dosage, consistent efficacy, and excellent value for money<\/td>\n<\/tr>\n
    \ud83c\udf3e Versatile and adaptable<\/strong><\/td>\nCan be applied as a soil treatment or mixed with water for spraying; suitable for various cultivation methods, including transplanting, direct seeding, and broadcasting.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

    \ud83c\udfaf\u00a0Preventing Objects<\/strong><\/h4>\n
    \n

    Primary prevention and eradication:<\/strong> Annual and perennial broadleaf weeds and Cyperaceae weeds, such as heterostylous sedge, water sedge, fireweed, duckbill, water celery, jointed water plantain, wild arrowhead, water milfoil, duckweed, and water hyssop.<\/p>\n

    <\/div>\n<\/div>\n
    \n

    Not effective against the following weeds:<\/strong> Grass weeds such as barnyard grass and common barnyard grass (for barnyard grass at the two-leaf stage or later, this product is highly ineffective when used alone and must be mixed with dichlorquinoleic acid or Grass-Killer).<\/p>\n

    <\/div>\n<\/div>\n
    Suitable crops:<\/strong> Rice seedling beds, direct-seeded rice fields, transplanted rice fields, and rice fields with scattered seedlings.<\/div>\n
    \n

    IV. Usage and dosage<\/h3>\n

    \ud83d\udccb\u00a0Rice field use program<\/strong><\/h4>\n
    \n
    \n
    \n

    forms<\/span><\/p>\n

    <\/div>\n
    <\/div>\n<\/div>\n<\/header>\n
    \n\n\n\n\n\n\n\n\n
    Crop type<\/th>\nApplication period<\/th>\nDosage (formulated dose\/acre)<\/th>\nwater consumption<\/th>\nMode of application<\/th>\n<\/tr>\n<\/thead>\n
    Rice seedling beds\/direct-seeding fields<\/strong><\/td>\nRice at the 1\u20133-leaf stage (3\u201320 days after transplanting)<\/td>\n7.5\u201315 grams per mu<\/strong><\/td>\n30 kilograms per mu<\/td>\nApply by mixing with toxic soil and spreading or spraying<\/td>\n<\/tr>\n
    Rice transplanting field<\/strong><\/td>\n3\u201320 days after transplanting<\/td>\n7.5\u201315 grams per mu<\/strong><\/td>\n30 kilograms per mu<\/td>\nApply by mixing with toxic soil and spreading or spraying<\/td>\n<\/tr>\n
    Rice Fields with Transplanted Seedlings<\/strong><\/td>\n3\u20136 days after transplanting (before barnyard grass reaches the 1-leaf-1-heart stage)<\/td>\n7.5\u201315 grams per mu<\/strong><\/td>\n30 kilograms per mu<\/td>\nSpreading the soil mixed with poison<\/td>\n<\/tr>\n
    Dry-seeded fields<\/strong><\/td>\nRice at the 1\u20133-leaf stage<\/td>\n7.5\u201315 grams per mu<\/strong><\/td>\n30 kilograms per mu<\/td>\nSpray, then flood-irrigate once 1\u20132 days after application<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    \n
    \n

    Active ingredient dosage:<\/strong> The active ingredient dosage per mu for 20% pyrimidylsulfuron is 1.5\u20133 grams per mu<\/strong>\u3002<\/p>\n

    <\/div>\n<\/div>\n<\/blockquote>\n
    \n

    V. Guidance for use<\/h3>\n

    \ud83d\udd27\u00a0Application Points<\/strong><\/h4>\n
    \n
    \n
    \n

    forms<\/span><\/p>\n

    <\/div>\n
    <\/div>\n<\/div>\n<\/header>\n
    \n\n\n\n\n\n\n\n\n\n
    move<\/th>\noperational specification<\/th>\n<\/tr>\n<\/thead>\n
    1. Seize the opportunity<\/strong><\/td>\nApply the herbicide when rice is in the 1\u20133-leaf stage or 3\u201320 days after transplanting; it is most effective during the early stages of weed emergence.<\/td>\n<\/tr>\n
    2. Aquifer management<\/strong><\/td>\nMaintain a water depth of 3\u20135 cm during application, and keep the water in the field for 5\u20137 days after application.<\/td>\n<\/tr>\n
    3. Dispensing methods<\/strong><\/td>\nUsing the two-step dilution method, first thoroughly disperse the chemical in a small amount of water, then add sufficient water.<\/td>\n<\/tr>\n
    4. Poisonous soil method<\/strong><\/td>\nMix the formulation with 20 kilograms of fine, moist soil per mu, and apply evenly after the morning dew has dried.<\/td>\n<\/tr>\n
    5. Spraying<\/strong><\/td>\nMix 30 kilograms per mu with water and spray evenly to ensure complete coverage of the weeds.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

    \u26a0\ufe0f\u00a0Key Considerations<\/strong><\/h4>\n
      \n
    1. \n
      \n

      \u23f0 Optimal application period:<\/strong> maize1\u20133-leaf stage<\/strong>The best results are achieved when the pesticide is applied 3\u201320 days after transplanting; in dry-seeded fields, flood irrigation should be performed once 1\u20132 days after application, and the soil should be kept moist.<\/p>\n

      <\/div>\n<\/div>\n<\/li>\n
    2. \n
      \n

      \ud83d\udeab Contraindications:<\/strong> \u5bf9Barnyard grass and thousand-gold seed are ineffective<\/strong>, in fields where barnyard grass is the dominant weed, this product should be mixed with dichloroquinoline acid or a special grass-control mixture; as late-season rice varieties (japonica and glutinous rice) are relatively sensitive to this product, application during the budding stage of late-season rice should be avoided whenever possible.<\/p>\n

      <\/div>\n<\/div>\n<\/li>\n
    3. \n
      \n

      \ud83d\udca7 Water Management:<\/strong> Maintain a water depth of 3\u20135 cm during application, and keep the field watered for 5\u20137 days after application. For dry-seeded fields, flood-irrigate once 1\u20132 days after application and keep the soil moist.<\/p>\n

      <\/div>\n<\/div>\n<\/li>\n
    4. \n
      \ud83c\udf21\ufe0f Temperature effects:<\/strong> The drug's efficacy is stable and is minimally affected by temperature.<\/div>\n<\/li>\n
    5. \n
      \ud83d\udc1f Aquatic safety:<\/strong> It is low in toxicity to fish, birds, and bees, but caution is still advised in rice paddies where fish are raised.<\/div>\n<\/li>\n
    6. \n
      \n

      \ud83e\uddea Blending recommendations:<\/strong> When used alone, it is very ineffective against barnyard grass at the two-leaf stage or later; it is often combined withHecaote or dichloroquinoline acid<\/strong>When used in combination, they provide excellent protection.<\/p>\n

      <\/div>\n<\/div>\n<\/li>\n
    7. \n
      \ud83d\udd04 Resistance management:<\/strong> Long-term single use is prone to resistance, it is recommended to combine withBenzylsulfuron, Pentafluorophenoxanil<\/strong>Rotate the use of herbicides with different modes of action.<\/div>\n<\/li>\n
    8. \n
      \ud83d\udee1\ufe0f security:<\/strong> Wear protective clothing, gloves, and a mask when applying the pesticide; wash your hands and face immediately after application; pregnant and breastfeeding women should avoid contact.<\/div>\n<\/li>\n
    9. \n
      \ud83e\uddf9 Instrument cleaning:<\/strong> Thoroughly clean the sprayer after use to prevent residual pesticide from causing phytotoxicity to other crops.<\/div>\n<\/li>\n
    10. \n
      \ud83d\udce6 Storage conditions:<\/strong> Store in a cool, dry, well-ventilated place, away from direct sunlight and high temperatures; keep away from sources of fire and out of the reach of children.<\/div>\n<\/li>\n<\/ol>\n
      \n

      Sixth, product specifications and packaging<\/h3>\n
      \n
      \n
      \n

      forms<\/span><\/p>\n

      <\/div>\n
      <\/div>\n<\/div>\n<\/header>\n
      \n\n\n\n\n\n\n\n\n\n\n
      sports event<\/th>\nparameters<\/th>\n<\/tr>\n<\/thead>\n
      Active ingredient content<\/td>\nPyrimidylsulfuron \u226520%<\/td>\n<\/tr>\n
      exterior condition<\/td>\nWhite to pale yellow powder<\/td>\n<\/tr>\n
      Suspension rate<\/td>\n\u226570%<\/td>\n<\/tr>\n
      Wetting time<\/td>\n\u2264120 seconds<\/td>\n<\/tr>\n
      Packaging specification<\/td>\n10 g \u00d7 100 bags\/case, 25 g \u00d7 200 bags\/case, 50 g \u00d7 100 bags\/case, 100 g \u00d7 50 bags\/box<\/td>\n<\/tr>\n
      date of use (on foodstuffs)<\/td>\n2 years<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
      \n
      \n
      Warm Tip:<\/strong> When applying this product, please follow the guidance of your local plant protection authorities and adjust the application plan as appropriate based on local weed communities, cultivation practices, and climatic conditions.<\/div>\n<\/blockquote>","protected":false},"excerpt":{"rendered":"

      Pyrazosulfuron<\/p>","protected":false},"featured_media":1737,"comment_status":"open","ping_status":"closed","template":"","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"default","_kad_post_title":"","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":""},"product_brand":[],"product_cat":[34,41],"product_tag":[],"class_list":["post-1351","product","type-product","status-publish","has-post-thumbnail","product_cat-34","product_cat-plant_protection","first","outofstock","taxable","shipping-taxable","purchasable","product-type-simple","entry","content-bg","loop-entry"],"taxonomy_info":{"product_cat":[{"value":34,"label":"0713=\u9664\u8349\u5242"},{"value":41,"label":"\u690d\u7269\u4fdd\u62a4"}]},"featured_image_src_large":["https:\/\/img.fulltsing.cn\/Sftmedia\/071328W2\/071328W2_bag_1kg.png",1024,1024,true],"author_info":[],"comment_info":0,"_links":{"self":[{"href":"https:\/\/www.fulltsing.cn\/en\/wp-json\/wp\/v2\/product\/1351","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fulltsing.cn\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.fulltsing.cn\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fulltsing.cn\/en\/wp-json\/wp\/v2\/comments?post=1351"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fulltsing.cn\/en\/wp-json\/wp\/v2\/media\/1737"}],"wp:attachment":[{"href":"https:\/\/www.fulltsing.cn\/en\/wp-json\/wp\/v2\/media?parent=1351"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.fulltsing.cn\/en\/wp-json\/wp\/v2\/product_brand?post=1351"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.fulltsing.cn\/en\/wp-json\/wp\/v2\/product_cat?post=1351"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.fulltsing.cn\/en\/wp-json\/wp\/v2\/product_tag?post=1351"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}