Relent® is a selective insect growth regulator for the control of Whitefly on Greenhouse Tomatoes and Greenhouse Cucumbers.
Active Ingredient:
100g/litre Pyriproxyfen EC.
How it works: (key point).
– Mimics juvenile hormone in insects.
Stops:
– Egg development.
– Larvae → adult transition.
– No effect on adults or pupae.
– So control is slow but long-lasting — you won’t see immediate kill.
Application:
– Typically used as a high-volume spray to runoff.
Label guidance:
– Apply evenly with good coverage.
– Greenhouse use only (strict restriction).
Example Regulatory Guidance:
– Around 500 mL/ha.
– Max 2 applications per crop.
Resistance Management:
– Group 7 insecticide.
Rules:
– Max 2 applications per crop per year.
– Rotate with other modes of action.
IPM Compatibility: (Important).
Generally:
– Low toxicity to parasitoids (Encarsia, etc).
– Safe for bumblebees (avoid spraying during active foraging).
– Harmful to ladybird larvae → avoid if relying on biological control.
Safety & Environmental Hazards:
– Very toxic to aquatic life.
– Very toxic to terrestrial invertebrates.
Causes:
– Skin irritation.
– Serious eye damage.
Key Precautions:
– Avoid spray drift.
– Do not contaminate waterways.
– Greenhouse-only use.
Handling & Storage:
– Combustible liquid → keep away from heat.
– Triple rinse containers before disposal.
– Use AgRecovery where possible.
So:
– Relent = insect control (whitefly).
– The others you shared = Fungicides (Disease Control).
Bottom line:
– Best used early in Whitefly Cycle (Eggs/Larvae stage).
– Works slowly but disrupts population build-up.
– Strong fit in IPM programmes, but watch beneficial insects.
Caution:
Must be used strictly according to label directions.
Available in 1L
Relent Technical Guide
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