Everything about Preemergent Herbicides totally explained
Preemergent herbicides prevent the
germination of seeds by inhibiting a key
enzyme. Preemergent herbicides are used to prevent
crabgrass from appearing in the summer by application during the late spring.
Preemergent herbicides
- Pendulum, used for control of crabgrass in turf. Its active ingredient is pendimethalin.
- Surflan, used for control of crabgrass in turf. Its active ingredient is oryzalin.
Crabgrass
Preemergent herbicides must be applied at a critical time. If they're applied to the soil too early they get washed too deep into the soil by rainwater. If they're applied too late the key enzyme inhibited is no longer active. The rule of thumb is to apply when the local
forsythia blooms are wilting. These herbicides can be formulated into slow release pellets that can be applied earlier in the year and still be releasing seed germination inhibitor at the critical time.
Further Information
Get more info on 'Preemergent Herbicides'.
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