西瓜的农药残留分布特点

这篇经验文章会给农资从业者们说明“西瓜的农药残留分布特点”的内容进行分析，希望对各位农资人们有少许帮助，欢迎大家收藏本站！

1、南瓜禁用什么农药？

在南瓜生长中，严格禁止使用甲胺磷、呋喃丹、杀虫啉、氧化乐果、三氯杀螨醇、甲基1605、除草脒等农药。

南瓜体内农药残留量与最后一次施药距采收时间的长短关系密切。间隔期短，则农药残留量多；反之则少。生产者一定要严格掌握各种农药的安全间隔期。一般生物农药安全间隔期为3～5天，有机磷农药为7～10天，杀菌剂除百菌清、多菌灵要求14天以上外，其余均为7～10天。

2、甲禾灵残留期多少天？

高效氟吡甲禾灵在土壤中的残留期一般为7天左右，它在土壤中的消解半衰期大约为20个小时左右，属于易分解农药。高效氟吡甲禾灵的适用作物：蔬菜、棉花、大豆、花生、土豆、油菜、西瓜等。用药的注意事项：禾本科作物对该药物较敏感，施药时应避免药液漂到玉米、小麦、水稻等作物上，以免产生药害。

3、为啥种西瓜对土地不好？

西瓜不能连作的原因主要有两个，一是因为种过西瓜的土壤中会残留病菌，下年再种西瓜后便容易发生病害，二是因为西瓜在生长过程中需要消耗土壤中的矿物质，连作会使土壤中的矿物质越来越少，不利于西瓜的生长，因此西瓜才不宜连作。针对西瓜重茬地，一般可以使用适量的生物菌肥和中微量元素肥来改良土壤。

4、玉米地种西瓜除草剂残留解决办法？

如果地里已经有比较严重的除草剂残留，下一季应增施有机肥，科学改良土壤，增加土壤有益微生物，这样才能缓解残留。

5、怎样解硝磺莠去津用于西瓜旳药害？
硝磺莠去津用一般在玉米上使用，莠去津在土壤中残留期较长，且西瓜属阔叶作物，对玉米地残留的除草剂非常敏感，如果西瓜种植前没有对土壤中的残留进行降解而产生了药害，你可以在药害前期尽快用奈安除草降解剂进行药害的救治，尽量在根和心叶未受损前进行救治为好。

希望可以帮到你。

拓展好文：不同产地西瓜农药残留分析与膳食风险评估

　　To clarify the status of pesticide residues in different regions’ watermelons and distinguish the differences of pesticide residues, 80 samples of watermelons from Xingjiang, Shangdong and Guangxi were select** to indentify 60 kinds of pesiticide residue levels. Then, bas** on the vaterinary drug residue risk ranking method of the committee on veterinary drugs. Safety levels, the pesticide residues of watermelons from three places were assess** by risk asses**ent for acute and chronic **tary intake. The results show** that 11 kinds of pesticide residues were detect** in the three producing areas and the types of pesticide residues were 6, 7, 8 in Xinjiang, Shandong, and Guangxi watermelons, respectively. The residue levels and the pesticide risk scores were all different. Pesticides triazophos, dichlorvos, prochloraz, anisole (24.60, 24.60, 18.30, 18.15) in Guangxi, pesticides anisole and trimethoprim (18.50, 18.10) in Shandong, and pesticides Phenylfenazol (18.20) in Xinjiang had relatively high risk scores. Acute and chronic **tary risk of the detect** pesticides show** that the percentages of ADI and ARfD of all pesticide residues in watermelon rang** between 0.01% and 1.53%, 0.03% and 23.30%, respectively, which were far less than 100%. The pesticide residue types, residue levels and risk scores that detect** in the three regions were different, and attention should be paid to the corresponding pesticides in the production area, although the levels of pesticide residues fall within the safety limit.