Overview
Methomyl is a carbamate insecticide developed for its potent action against a broad spectrum of insect pests. It is widely used in agriculture due to its systemic and contact activity, making it effective against pests that feed on treated plants. Methomyl works by inhibiting acetylcholinesterase, an enzyme essential for nerve function in insects, leading to paralysis and death. First introduced in the 1960s, methomyl has become a key tool in integrated pest management (IPM) systems. However, its high toxicity to non-target organisms, including humans, has led to strict regulatory controls in many countries. Proper handling, storage, and application are critical to minimizing risks.
Physical and Chemical Properties
Methomyl is a white crystalline solid with a molecular weight of 162.21 g/mol and a density of 1.29 g/cm³. It has a melting point of 78-79°C and is highly soluble in water (58 g/L at 25°C) as well as organic solvents like acetone and methanol. These properties make it suitable for formulation as soluble concentrates, granules, and wettable powders. As a carbamate compound, methomyl is chemically stable under normal storage conditions but hydrolyzes in alkaline environments. It is sensitive to UV light, which can degrade its efficacy over time. These characteristics influence its application methods and storage requirements.
Main Applications
Methomyl is primarily used in agriculture to control pests such as aphids, thrips, leafminers, and Lepidoptera larvae in crops like cotton, vegetables (e.g., tomatoes, peppers), fruits (e.g., citrus, apples), and ornamentals. It is applied as a foliar spray or soil treatment, depending on the target pest and crop growth stage. In addition to agricultural uses, methomyl has been employed in public health programs to control disease vectors like mosquitoes. However, due to its high toxicity, such applications are increasingly restricted. Its fast action and broad-spectrum activity make it valuable for resistance management when used in rotation with other insecticide classes.
Safety and Storage
Methomyl is classified as highly toxic (WHO Class Ib) and poses significant risks to humans, animals, and aquatic life. Exposure can occur through inhalation, skin contact, or ingestion, leading to symptoms such as nausea, dizziness, convulsions, and respiratory failure. Immediate medical attention is required in case of poisoning. Proper storage involves keeping containers tightly sealed in a cool, dry, well-ventilated area away from food, feed, and oxidizing agents. Spills should be contained and cleaned up immediately using appropriate protective equipment. Regulatory requirements for labeling, transportation, and disposal must be strictly followed to ensure safety and environmental protection.
B2B Procurement Guide
When procuring methomyl, B2B buyers should prioritize suppliers with certifications such as ISO 9001 and relevant regulatory approvals. Request detailed product specifications, including purity, formulation type, and batch analysis reports. Safety data sheets (SDS) must be reviewed to ensure compliance with local and international regulations. Consider logistical factors such as packaging (e.g., sealed drums or bags), storage conditions during transit, and lead times. Pricing varies based on quantity, formulation, and supplier reputation. Establish long-term relationships with reliable suppliers to ensure consistent quality and availability. Always verify that end-use complies with local pesticide regulations to avoid legal and environmental liabilities.
Related Manufacturers
- 主营：蓖麻油酸、吡啶硫酮铜、6-萘三磺酸钠、硫酸烟酰苯胺、茶皂素、γ-异辛氧基丙胺、N'-羰基二咪唑、10-蒽醌
- 主营：厌氧塔、吸泥机、旋转钟、螺旋砂、气浮机、过滤机、沉淀池、dtro垃圾、pp喷淋塔、污水预处、斜管斜板、溶气气浮、加药装置、厌氧装置、废水处理、机械格栅、沙场污水、机械加速、垃圾压缩、一体化设备、河道治理、高密度沉淀池、养殖废水处理、钟式沉沙机
- 主营：气象站、气象传感器、防爆气象站、风吸式杀虫灯、农业气象站、校园气象站、便携式气象站、土壤墒情监测站
- 主营：260号溶剂油、二甲硫基甲苯二铵、二乙基甲苯二铵、杀藻灭菌剂、硅油、二月桂酸二丁基锡、丙二醇、甘油丙三醇、对甲苯磺酰氯、聚乙二醇、丙二醇丁醚、乙二醇丁醚、乙酯、二甲苯、硫酸镍、氯化镍、氯化锌、溶剂油120号/150号/200号、D系列溶剂油D40/D60/D80、环保溶剂油D100/D110/D130、磺化煤油、莫卡/橡胶硫化剂
- 主营：多参数水质检测仪、红外测油仪、全自动凯氏定氮仪、一体化万用蒸馏仪、全自动液液萃取仪、食品安全检测仪、cod测定仪、便携式污水检测仪、水质理化箱、水质重金属检测仪、食品重金属检测仪、农残检测仪、国标COD消解器、萃取仪、滴定仪、浊度计、紫外测油仪、离子计、全自动电位滴定仪、土肥仪、土壤墒情检测仪、粗脂肪测定仪、粗纤维测定仪、水质微生物采样检测箱
- 主营：igg抗体、糖蛋白、试剂盒、脂蛋白、人瘦素、粗纤维、猪睾酮、烯二酮、nad激酶、测试盒、牛瘦素、牛胆酸、原果胶、磷酸酶、犬肾素、含水量、人蛋白、甜菜碱、igm抗体、dna抗体、磷脂酶、大鼠超、犬叶酸、人胆酸、样受体
- 主营：试剂盒、elisa试剂盒、细胞、天青杀素、pcr试剂盒
- 主营：穿串机、羊肉串穿串机、快速穿切一体机、麦穗肠穿切一体机、穿肉串设备、鱼去鳞机、去鳞设备、鱼去头机、鱼开片机、鱼肉采肉机、鱼斜切片机、鱼去中骨机、鱼肉切片机、鱼类真空吸脏机、重量分级机、重量分级秤、水果分选机、火龙果组合秤、海参组合秤、配重组合秤、料盒式分选机、吸鱼泵、洗筐机、气泡清洗机、开肚去内脏机
- 主营：化工
- 主营：切骨机、打蹄子机、剪猪蹄设备、猪头液压剪、烫猪蹄设备、猪头打毛机、牛羊肚清洗机、猪蹄螺旋浸烫机
- 主营：液压拔管机、电动液压扳手、移动式喷砂机、各种薯类杀秧机、箱式喷砂机、智能清淤机器人、液压升降柱、等离子切割机、玻璃搬运车、龙门压力机、船式洗车槽、履带绳锯机、矿用井下电视、柴油防汛泵车、车载式马路吹风机、镗孔镗焊机、吸粪车、除雪滚刷、破拆工具组、液压板换夹紧器、封闭式扫雪机、机耕船、智能张拉设备、智能压浆台车、中部取样机、液压顶管机
- 主营：不锈钢储罐、陶瓷过滤机、冷凝水回收装置、杀鱼机、玻璃钢罐、冷凝器、离心机、压滤机
- 主营：聚烯烃、机械仪器、工业壳体、升级透明聚丙烯
- 主营：pa66、pom赛钢、TPU原料、PA6尼龙、瑞士EMS原料、杜邦pom、宝理pom、旭化成pom、巴斯夫pa66、科思创TPU、PC/ABS、聚丙烯pp、PA6T、日本宝理PPS、TPV、PBT、TPU1185A10、PC540、M90-44、F20-03、POM100P、杜邦pom500p、德瑞灵pom、埃克森美孚poe、聚碳酸酯PC
- 主营：画舫船、游船、观光船、木船、电动船、景观船、装饰船、铝合金船、钓鱼船、路亚艇、保洁船、玻璃钢船、欧式船、乌篷船、铝合金快艇、休闲快艇、房船、餐饮船、钓鱼艇、渔船、表演船、住宿船