Generally speaking, lawn weeds refer to plants that grow in the wrong place. That is to say, plants that grow in unwanted places, or plants that grow in places that should not grow. Crabgrass, sedge and Alternanthera philoxeroides are weeds, and horseshoe tendons and Manila are lawn grasses, but when horseshoe tendons grow in Manila or Manila grows in Manila, they are also regarded as weeds.

Weeds are usually divided into three categories, namely Gramineae weeds, Cyperaceae weeds and broadleaf weeds. Gramineae weeds and Cyperaceae weeds are also called monocotyledonous weeds, and broadleaf weeds are also called dicotyledonous weeds.

Monocotyledon weeds refer to weeds with only one cotyledon in the seed embryo. Dicotyledonous weeds refer to weeds with two cotyledons in the seed embryo.

The main morphological characteristics of gramineous weeds are: long and narrow leaves, parallel veins, cylindrical stems, often hollow internodes and fibrous roots. Such as crabgrass, cattail and barnyard grass.

The main difference between Cyperaceae weeds and Gramineae weeds is that the stems are mostly three-spindle-shaped, solid and knotless, and some are cylindrical and hollow. Such as rhizoma Cyperi and centipede.

The main morphological characteristics of broad-leaved weeds are: leaves are round, heart-shaped or rhombic, veins are usually reticulate, and stems are round or square. Such as Alternanthera philoxeroides, Oxalis, coriander, etc.

Generally speaking, herbicides should be treated in the soil at the peak of lawn weed germination to achieve good preventive effect. Herbicide can be used to control perennial weeds or weeds that grow after the expiration date. In this way, herbicides are used three or four times a year, namely early spring, spring, summer, autumn and winter ... Generally speaking, lawn weeds refer to plants that grow in the wrong place. That is to say, plants that grow in unwanted places, or plants that grow in places that should not grow. Crabgrass, sedge and Alternanthera philoxeroides are weeds, and horseshoe tendons and Manila are lawn grasses, but when horseshoe tendons grow in Manila or Manila grows in Manila, they are also regarded as weeds.

Weeds are usually divided into three categories, namely Gramineae weeds, Cyperaceae weeds and broadleaf weeds. Gramineae weeds and Cyperaceae weeds are also called monocotyledonous weeds, and broadleaf weeds are also called dicotyledonous weeds.

Monocotyledon weeds refer to weeds with only one cotyledon in the seed embryo. Dicotyledonous weeds refer to weeds with two cotyledons in the seed embryo.

The main morphological characteristics of gramineous weeds are: long and narrow leaves, parallel veins, cylindrical stems, often hollow internodes and fibrous roots. Such as crabgrass, cattail and barnyard grass.

The main difference between Cyperaceae weeds and Gramineae weeds is that the stems are mostly three-spindle-shaped, solid and knotless, and some are cylindrical and hollow. Such as rhizoma Cyperi and centipede.

The main morphological characteristics of broad-leaved weeds are: leaves are round, heart-shaped or rhombic, veins are usually reticulate, and stems are round or square. Such as Alternanthera philoxeroides, Oxalis, coriander, etc.

Generally speaking, herbicides should be treated in the soil at the peak of lawn weed germination to achieve good preventive effect. Herbicide can be used to control perennial weeds or weeds that grow after the expiration date. In this way, using herbicides three or four times a year, that is, in early spring, spring and summer, autumn and winter, can basically achieve the purpose of controlling the harm of annual weeds. Gramineae weeds are the focus of prevention and control in spring and summer, and broadleaf weeds are the focus of prevention and control in autumn and winter.

Weeds are usually divided into annual weeds and perennial weeds according to their life history. Among them, annual weeds can be divided into summer annual weeds and winter annual weeds.