BULLDOCK 25 EC INSECTICIDE
- APVMA no.
- 40422
- Registrant
- BAYER CROPSCIENCE PTY LTD
- Formulation
- EMULSIFIABLE CONCENTRATE
BULLDOCK 25 EC Insecticide is an emulsifiable concentrate formulation containing the synthetic pyrethroid active constituent beta-cyfluthrin (25 g/L) dissolved in a liquid hydrocarbon solvent (802 g/L). It functions as a broad-spectrum insecticide providing rapid contact and ingestion knockdown activity against designated chewing and sucking insect pests in horticultural cropping systems.
In Australian orchard management—such as macadamia plantings in the Northern Rivers region of New South Wales or avocado blocks in the Atherton Tableland and Bundaberg districts—this product fits into targeted pest management programmes for fruit spotting bug. The emulsifiable concentrate formulation ensures easy dispersion in the spray tank and effective coverage across tree canopies when applied during key susceptible crop growth windows.
Integrated pest management (IPM) programmes utilise beta-cyfluthrin for strategic knockdown of active pest populations. Because synthetic pyrethroids exert broad activity across target and non-target insects, applications should be timed strictly in response to orchard monitoring, pest scouting, and established action thresholds.
Active constituents
- LIQUID HYDROCARBON802 g/L
- BETA-CYFLUTHRIN25 g/L
Registered uses
| Crop | Pest or disease |
|---|---|
| Avocado | Fruit spotting bug |
| Macadamia | Fruit spotting bug |
Withholding period
WITHHOLDING PERIODS (WHP) Avocados Macadamias: DO NOT HARVEST FOR 7 DAYS AFTER APPLICATION.
The registered withholding period requires that avocados and macadamias must not be harvested for 7 days after application. Crop managers should verify withholding periods on the approved label against harvest schedules and trade destination requirements prior to treatment.
Mode of action
Beta-cyfluthrin is a synthetic pyrethroid active constituent belonging to IRAC Group 3A. It acts as a sodium channel modulator on the nerve axon of target insects. By delaying the closure of voltage-gated sodium channels, it causes continuous, repetitive nerve discharges leading to rapid paralysis, feeding cessation, and death via contact or ingestion.
Resistance management
To manage and delay the onset of insecticide resistance in target populations such as fruit spotting bug, strict adherence to IRAC Group 3A resistance management strategies is required. Avoid consecutive applications or season-long reliance on synthetic pyrethroids. Rotate applications with registered insecticides from alternative mode-of-action groups. Pest pressure should be monitored regularly throughout the season, reserving chemical intervention for windows where economic thresholds are reached.
Tank-mix compatibility
Because this product is an emulsifiable concentrate containing liquid hydrocarbon solvents, physical compatibility and plant safety should be verified before tank mixing with other agricultural chemicals, foliar nutrients, or crop oils. Mixing emulsifiable concentrates with crop oils, elemental sulphur, or copper products—particularly during periods of high ambient temperature or crop heat stress—can increase the risk of leaf or fruit burn. Always conduct a small-scale jar test for physical compatibility and consult the approved product label prior to commercial mixing.
Handling and environment
Handle with care and observe standard safety procedures for emulsifiable concentrate insecticides. Personal protective equipment (PPE)—including chemical-resistant gloves, eye protection, washable hat, and overalls—should be worn when opening the container, preparing the spray mix, and operating application equipment. Avoid contact with skin and eyes, and prevent inhalation of spray mist. Care must be taken to avoid contamination of waterways and aquatic environments. Direct guidance regarding chemical handling, re-entry precautions, environmental safety, and buffer requirements is located on the APVMA-approved label.
Common questions
- When is monitoring for fruit spotting bug most critical in tree crops?
- Monitoring is critical during early fruit set and rapid crop development, as young developing fruit and nuts are particularly vulnerable to feeding damage. Regular visual scouting and monitoring traps assist in identifying when pest thresholds are met.
- How does an emulsifiable concentrate (EC) formulation behave in the spray tank?
- An EC formulation contains active constituents dissolved in an organic solvent with emulsifying agents. When added to water, it forms a stable emulsion that provides uniform droplet distribution across target plant surfaces.
- Why is mode-of-action rotation essential when using Group 3A synthetic pyrethroids?
- Repeated use of Group 3A insecticides selects for resistant individuals within an insect population. Rotating between different chemical groups breaks selection pressure and preserves the long-term effectiveness of available control options.
- What precautions should be taken when spraying in hot weather?
- Spraying during high heat or under evaporative conditions can increase spray drift and potential foliage damage, especially when using solvent-based formulations. Check the approved label for environmental condition recommendations before applying.
- Where can specific spray water volumes and application rates be found?
- Detailed instructions on application rates, canopy water volumes, spray equipment setup, and buffer distances are provided exclusively on the APVMA-approved label attached to the product container.
- How does contact action impact canopy spray coverage strategy?
- Because contact insecticides require physical interaction with the target insect or direct contact with treated foliage, high-quality spray coverage throughout the entire tree canopy is essential for effective pest control.