There is only one registered domestic enterprise of Maleic hydrazide technical

June 4, 2024, Jiangsu Province Lianyungang City Jindun Agricultural Chemical Co., Ltd. of the Maleic hydrazide technical product registration certificate expired and did not renew, so far, in China registered the technical products of only two enterprises, including foreign enterprises and domestic enterprises each 1, respectively, Arysta and Hebei Handan Zhao Du Fine Chemical Co., LTD.

As a plant growth regulator, Maleic hydrazide has endothermic conductivity, which can be inhaled by the leaf surface or root of the plant and transmitted to the plant by xylem and phloem, and inhibit plant growth by preventing cell division. Maleic hydrazide has been registered and promoted in China since the 1990s, mainly used to inhibit the growth of tobacco and potato axillary buds. From October 2022, the registration of citrus tree control will be increased. In addition, a number of studies carried out around the country have shown that Maleic hydrazide has a significant effect on inhibiting the flowering of almond, delaying the germination of Sichuan Pepper, delaying the germination of pomegranate, promoting the dwarfization and compaction of jujube, and regulating the internode growth of sweet sorghum.

In terms of formulations, a total of 8 products have been effectively registered, including 6 SOL (AS) (4 with 30.2% content, 1 with 23% content and 1 with 40% content), and 2 WDG (all with 80% content); Six were registered on tobacco, three on citrus trees, and one on potatoes.

According to GB 2763, the MRLS of Maleic hydrazide in garlic, onion, onion and potato in China are 15, 15, 15 and 50 mg/kg respectively, and the MRLS in citrus and other foods (agricultural products) have not been established.