Butachlor and Pretilachlor: Distinct Herbicides with Varied Characteristics
1. Chemical Class
Butachlor is classified as an acetanilide herbicide.
Pretilachlor is an anilide herbicide.
2. Chemical Formula
Both have the chemical formula C₁₇H₂₆ClNO₂.
3. Formulation
Butachlor is available in emulsifiable concentrate and granular formulations.
Pretilachlor is marketed as a 50% emulsifiable concentrate formulation.
The following are the application areas of the products:
4. Selectivity
Butachlor is a selective systemic herbicide.
Pretilachlor is a broad-spectrum systemic herbicide.
5. Action on Weeds
Butachlor primarily controls annual grassy weeds and some broadleaf weeds in direct-seeded or transplanted rice fields. It also has an inhibitory effect on certain weeds in vegetable fields.
Pretilachlor shows excellent activity against annual weeds, sedges, and broadleaf weeds in rice fields, including Echinochloa Beauvoid, Cyperus difformis, and other sedges.
The following are the application areas of the products:
6. Physical Properties
Butachlor: It is an aromatic amide compound with the IUPAC name 2-chloro-N-(2,6-diethylphenyl)acetamide. The amide nitrogen atom is replaced by a butoxymethyl group. It has a hydrogen bond donor count of zero, a hydrogen bond acceptor count of 2, a rotatable bond count of 9, a heavy atom count of 21, and a formal charge of zero. It is an amber or light yellow liquid with a faint, sweet odor. Its boiling point is 156 degrees Celsius, melting point is -2.8 degrees Celsius, and flash point is 114 degrees Celsius. It is soluble in most organic solvents such as diethyl ether, acetone, benzene, ethanol, ethyl acetate, and hexane.
Pretilachlor: A broad-spectrum systemic herbicide that is highly effective against various weeds in rice fields.
In conclusion, butachlor and pretilachlor differ in chemical class, formulation, selectivity, action on weeds, and physical properties.
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