Una composici n de benzoxazinona de f rmula (1) que comprende la benzoxazinona de f rmula (1) en forma de part culas en donde como m ximo 50 25 por volumen de las part culas tiene un di metro por debajo de 3 mm Reivindicaci n In this case, 50% of the particle volume is less than 3 mm in diameter. Claim 6: a plant protective agent characterized by the composition and water composition of claims 1 to 5. Claim 8: plant protectant in accordance with claim 7, which is characterized by a concentrated suspension (SC),Oil scatter (OD)1. WP and / or WG； 11. Claim 9: a process for culturing plant protectant, characterized in that the active content is mixed with herbicide and water of benzoxazina component of formula (1) according to claims 1 to 5. 11. Claim 11: a method of controlling poor crop vegetation, characterized by allowing an active amount, i.e. a herbicide used as a component of formula (1) benzoxazina according to any one of claims 1 to 5,In their environment or seeds. 13. Claim 13: formula (1) benzoxazina component is used according to any one of claims 1 to 5, which is characterized by the use of selective herbicides in crops. 11. Claim 14: Herbicide combination, which is characterized by an active herbicide containing one formulation of benzoxazina component (1) and at least another active compound selected from (b) class B 1 to class B 1 5 herbicides according to any one of the requirements of 1 to 5: (b) Class B1 to class B15 herbicides: B1) lipid biosynthesis inhibitor； (b) Octanoic acid inhibitor (ALS inhibitor)；(B3) photosynthesis inhibitor； B4) protodorviringen IX oxidata inhibitor； B5) bleaching herbicide； B6) hydroxyphenol inhibitor 3-phosphate octyl ester (EPSP inhibitor)；(B7) cyclopentaglutamic acid inhibitor； B8) 7.8-dihydroacrylate octyl ester inhibitor (DHP inhibitor)；(B9) mitochondrial inhibitor； B10) long chain fatty acid synthesis inhibitor (VLCFA inhibitor)；b11) cellulose biosynthesis inhibitors； b12) decoupling herbicides； b13) auxin herbicide
