preemergent herbicides造句

例句与造句

1. "' Dithiopyr "'is a preemergent herbicide for crabgrass control in turf and ornamental grasses.
2. In ornamental plantings, preemergent herbicides such as pendimethain, oryzalin, or trifluralin can control seedlings.
3. Dithiopyr acts primarily as a preemergent herbicide but can also be used in early postemergent control of crabgrass.
4. Other techniques reported effective are to fertilize with greater than two pounds of nitrogen per thousand square feet annually, and use of preemergent herbicides, isoxaben.
5. Recommendations include planting a non-host crop for several years after the infestation, pulling up host crops immediately, particularly before the dodder produces seed, and use of preemergent herbicides such as Dacthal in the spring.
6. It's difficult to find preemergent herbicides in a sentence. 用preemergent herbicides造句挺难的