Herbicide Application and Mechanisms
of Action
Pre-plant application - 🧠 ANSWER ✔✔Herbicide applied before planting
crops.
Pre-emergence application - 🧠 ANSWER ✔✔Herbicide applied before weed
emergence.
Post-emergence application - 🧠 ANSWER ✔✔Herbicide applied after
weeds have emerged.
Soil application - 🧠 ANSWER ✔✔Herbicide applied directly to soil.
Surface application - 🧠 ANSWER ✔✔Herbicide applied on the soil surface.
Sub-surface application - 🧠 ANSWER ✔✔Herbicide applied below the soil
surface.
,Fumigation - 🧠 ANSWER ✔✔Herbicide vapor used to control pests in soil.
Herbigation - 🧠 ANSWER ✔✔Herbicide applied through irrigation water.
Foliar application - 🧠 ANSWER ✔✔Herbicide applied directly to plant
leaves.
Blanket spray - 🧠 ANSWER ✔✔Herbicide sprayed uniformly over an area.
Directed spray - 🧠 ANSWER ✔✔Herbicide sprayed at specific target areas.
Spot application - 🧠 ANSWER ✔✔Herbicide applied to specific small areas.
Hill reaction - 🧠 ANSWER ✔✔Light-dependent photosynthesis reaction
involving water splitting.
Electron transfer chain - 🧠 ANSWER ✔✔Pathway for electron transport in
photosynthesis.
Inhibition of carbon dioxide assimilation - 🧠 ANSWER ✔✔Prevents CO2
conversion into glucose.
Bleaching herbicides - 🧠 ANSWER ✔✔Herbicides that inhibit carotenoid
biosynthesis.
, Inhibition of respiration - 🧠 ANSWER ✔✔Disrupts ATP production during
cellular respiration.
Inhibition of lipid synthesis - 🧠 ANSWER ✔✔Prevents synthesis of long-
chain fatty acids.
Inhibition of protein biosynthesis - 🧠 ANSWER ✔✔Prevents protein
production affecting plant growth.
Disruption of cell membrane - 🧠 ANSWER ✔✔Herbicides causing lipid
peroxidation in membranes.
Auxin type herbicides - 🧠 ANSWER ✔✔Herbicides promoting abnormal
plant growth.
Herbicide resistance prevention - 🧠 ANSWER ✔✔Methods to avoid
development of resistant weeds.
Herbicide selectivity - 🧠 ANSWER ✔✔Differential plant response to
herbicides.
Mechanisms of selectivity - 🧠 ANSWER ✔✔Factors affecting herbicide
effectiveness on different plants.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
of Action
Pre-plant application - 🧠 ANSWER ✔✔Herbicide applied before planting
crops.
Pre-emergence application - 🧠 ANSWER ✔✔Herbicide applied before weed
emergence.
Post-emergence application - 🧠 ANSWER ✔✔Herbicide applied after
weeds have emerged.
Soil application - 🧠 ANSWER ✔✔Herbicide applied directly to soil.
Surface application - 🧠 ANSWER ✔✔Herbicide applied on the soil surface.
Sub-surface application - 🧠 ANSWER ✔✔Herbicide applied below the soil
surface.
,Fumigation - 🧠 ANSWER ✔✔Herbicide vapor used to control pests in soil.
Herbigation - 🧠 ANSWER ✔✔Herbicide applied through irrigation water.
Foliar application - 🧠 ANSWER ✔✔Herbicide applied directly to plant
leaves.
Blanket spray - 🧠 ANSWER ✔✔Herbicide sprayed uniformly over an area.
Directed spray - 🧠 ANSWER ✔✔Herbicide sprayed at specific target areas.
Spot application - 🧠 ANSWER ✔✔Herbicide applied to specific small areas.
Hill reaction - 🧠 ANSWER ✔✔Light-dependent photosynthesis reaction
involving water splitting.
Electron transfer chain - 🧠 ANSWER ✔✔Pathway for electron transport in
photosynthesis.
Inhibition of carbon dioxide assimilation - 🧠 ANSWER ✔✔Prevents CO2
conversion into glucose.
Bleaching herbicides - 🧠 ANSWER ✔✔Herbicides that inhibit carotenoid
biosynthesis.
, Inhibition of respiration - 🧠 ANSWER ✔✔Disrupts ATP production during
cellular respiration.
Inhibition of lipid synthesis - 🧠 ANSWER ✔✔Prevents synthesis of long-
chain fatty acids.
Inhibition of protein biosynthesis - 🧠 ANSWER ✔✔Prevents protein
production affecting plant growth.
Disruption of cell membrane - 🧠 ANSWER ✔✔Herbicides causing lipid
peroxidation in membranes.
Auxin type herbicides - 🧠 ANSWER ✔✔Herbicides promoting abnormal
plant growth.
Herbicide resistance prevention - 🧠 ANSWER ✔✔Methods to avoid
development of resistant weeds.
Herbicide selectivity - 🧠 ANSWER ✔✔Differential plant response to
herbicides.
Mechanisms of selectivity - 🧠 ANSWER ✔✔Factors affecting herbicide
effectiveness on different plants.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
