The present invention relates to protoporphyrinogen oxidase inhibitors of the general formula (I)

##STR00001##

where the variables are defined herein. The invention features processes and intermediates for preparing the benzoxazinones of formula (I), compositions comprising them, and their use as herbicides—i.e. for controlling harmful plants. The invention also features methods for controlling unwanted vegetation comprising allowing an herbicidal effective amount of at least one benzoxazinone of formula (I) to act on plants, their seed, and/or their habitat.

The present invention relates to protoporphyrinogen oxidase inhibitors of the general formula (I)

##STR00001##

where the variables are defined herein. The invention features processes and intermediates for preparing the benzoxazinones of formula (I), compositions comprising them, and their use as herbicides—i.e. for controlling harmful plants. The invention also features methods for controlling unwanted vegetation comprising allowing an herbicidal effective amount of at least one benzoxazinone of formula (I) to act on plants, their seed, and/or their habitat.

The present invention relates to substituted N-phenyl-N-aminouracils of the general formula (I) or salts thereof

##STR00001##

wherein the radicals in the general formula (I) correspond to the definitions given in the description,
and to their use as herbicides, in particular for controlling broad-leaved weeds and/or weed grasses in crops of useful plants and/or as plant growth regulators for influencing the growth of crops of useful plants.

The present invention relates to substituted N-phenyl-N-aminouracils of the general formula (I) or salts thereof

##STR00001##

wherein the radicals in the general formula (I) correspond to the definitions given in the description,
and to their use as herbicides, in particular for controlling broad-leaved weeds and/or weed grasses in crops of useful plants and/or as plant growth regulators for influencing the growth of crops of useful plants.

The invention relates to the field of pesticide technology, and in particular a type of substituted thiadiazinone dioxide, preparation method, herbicidal composition and application thereof. The substituted thiadiazinone dioxide, as shown in general formula I.

##STR00001## wherein, R.sub.1 and R.sub.2 each independently represent hydrogen, cyano or alkyl with or without halogen and so on; X represents hydrogen or halogen; Y represents C—Z or N; Z represents hydrogen or halogen; and when X represents halogen, Z represents hydrogen. The compound has excellent herbicidal activity against gramineous weeds, broadleaf weeds or amaranthaceous weeds, and has high selectivity for crops such as soybean, corn, rice or wheat.

A compound represented by a formula (I) or a salt thereof, and a herbicide containing at least one selected from them as an active ingredient:

##STR00001## wherein R.sup.1 represents a substituted or unsubstituted C.sub.1-6 alkyl group or the like, R.sup.2 represents a substituted or unsubstituted C.sub.1-6 alkyl group or the like, R.sup.3 represents a hydrogen atom, a substituted or unsubstituted C.sub.1-6 alkyl group or the like, and Q represents a substituted or unsubstituted phenyl group or the like.

The invention belongs to the technical field of agricultural chemicals, and particularly relates to an aryl formamide compound containing chiral sulfur oxide or salt thereof, a preparation method, a herbicidal composition and a use thereof. The aryl formamide compound containing chiral sulfur oxide or salt thereof has the following structural formula:

##STR00001##

Z.sub.1, and Z.sub.2 each independently represent nitro, halogen, or cyano, etc.; X represents unsubstituted or substituted

##STR00002##

unsubstituted or substituted

##STR00003##

unsubstituted or substituted

##STR00004##

unsubstituted or substituted

##STR00005##

unsubstituted or substituted

##STR00006##

unsubstituted or substituted

##STR00007##

or unsubstituted or substituted

##STR00008##

Q represents halogen, cyano, cyanoalkyl, or nitro, etc.; Y represents hydrogen, etc.; wherein the compound has advantages of excellent herbicidal activity, higher crop safety, and especially good selectivity for key crops such as wheat, rice, corn.

A systemic, broad-spectrum herbicide comprises a water-soluble extract of one or more plant parts of rhubarb and yew. The herbicide can also contain other plant material, including plant parts of Bryonia and Laburnum. The herbicide, which is based on natural products can translocate to the roots of a plant, when the herbicide is applied to an aerial part of the plant. The herbicide can eradicate grasses, mosses and weeds, including bindweed, nettles and dockweed.

The present invention uses compound 3-OH-β-apo-13-carotenone (zaxinone) as a negative regulator of the plant hormone strigolactones (SLs). The compound 3-OH-β-apo-13-carotenone is a positive growth regulator which triggers the formation of crown roots and promotes growth in size and number of roots and shoots. Disclosed herein is a method of using 3-OH-β-apo-13-carotenone as a growth-promoting compound for cereal, grain and vegetable crops. The 3-OH-β-apo-13-carotenone compounds is also a negative regulator of strigolactone biosynthesis and release. Disclosed herein is a method of combating root parasitic weeds affecting cereal, grain and vegetable crops. Application of 3-OH-β-apo-13-carotenone to plant growth media down-regulates strigolactone production in cereal, grain and vegetable crops preventing root parasitic weed infestation of the crops by inhibiting germination of parasitic weed seeds.

The present invention uses compound 3-OH-β-apo-13-carotenone (zaxinone) as a negative regulator of the plant hormone strigolactones (SLs). The compound 3-OH-β-apo-13-carotenone is a positive growth regulator which triggers the formation of crown roots and promotes growth in size and number of roots and shoots. Disclosed herein is a method of using 3-OH-β-apo-13-carotenone as a growth-promoting compound for cereal, grain and vegetable crops. The 3-OH-β-apo-13-carotenone compounds is also a negative regulator of strigolactone biosynthesis and release. Disclosed herein is a method of combating root parasitic weeds affecting cereal, grain and vegetable crops. Application of 3-OH-β-apo-13-carotenone to plant growth media down-regulates strigolactone production in cereal, grain and vegetable crops preventing root parasitic weed infestation of the crops by inhibiting germination of parasitic weed seeds.