Maleic Hydrazide
Action/Use:
- Plant Growth Regulator
Use:
A growth inhibitor and preemergence or postemergence selective herbicide. Controls weeds such as wild onion, wild garlic in turf; growth inhibition of trees, shrubs, and grasses; tobacco sucker control; controls sprouting of onions and potatoes in storage.
Identification
Common Name(s): Maleic Hydrazide (BSI, ISOE, JMAF); ; Hydrazide Maléique (ISOF)
Chemistry
Class: Pyridazinone.
Properties: Melting point 292°C. Tech: Solubility at 25°C: ethanol 0.1%; DMF 2.4.
Mode of Action / Resistance Management
Chemical Group: None generally accepted
Mode of Action: Inhibits mitosis
Action Group: Not well understood
Registration
Outside U.S.A.: Allirem* in Belgium.
Environmental Guidelines
Hazards: Fish: LC50 1435 ppm (96 h) (rainbow trout). Bird: Dietary (8 day) >10,000 ppm (mallard duck)
Water Solubility: 6000 ppm
Safety Guidelines
Signal Word: CAUTION
Toxicity Class: III
Toxicity: Tech: (Rat): Oral LD50 3900 mg/kg. (Rabbit): Dermal LD50 >5000 mg/kg
Handling/storage Cautions: Harmful if swallowed. Avoid breathing spray mist. Avoid contact with skin, eyes, or clothing. Wash thoroughly after handling. Store under lock and key in a cool, dry, ventilated area away from heat or ignition source, secure from children or unauthorized personnel. De-Cut*, Fair Plus*, Super De-Sprout* have indefinite shelflife and should be stored at room temperature
Protective Clothing: Long-sleeved shirt and long pants. Waterproof gloves. Shoes plus socks.
Suppliers and Branded Products
Basic Producers:
Chemtura AgroSolutions (Royal MH-30*, Royal MH-30* XTRA)
Drexel Chemical Co. (Retard*, Sprout Stop*, Sucker Stuff*)
Fair Products, Inc. (De-Cut*, Fair 30*, Fair Plus*, FST-7*)
Formulators' Trade Names:
Coastal AgroBusiness, Inc. (Check MH15*)
SM-BT Co., Ltd. (SM* Malei)
Premix Products:
+ n-Decanol
- Leven-38* — Drexel Chemical Co.
Discontinued Names:
BH* 43
Chemform*
De-Sprout*
Evimazid*
Fair-2*
MH 2P*
Po-San*
Royal Slo Gro*
Sucker Atak*
Super De-Sprout*
Super Hex*
Super P*
Vondalhyde*
Vondrax*
