- Monitor pest numbers and apply control measures before adult populations reach high levels.
- Select registered insecticide control measures according to the primary growth stage of the pest, the infestation level and the age and type of crop.
- In cotton, spray decisions should be based on the Silverleaf Whitefly threshold matrix. Refer to the current Cotton Pest Management Guide for further details
- Where possible, utilise selective insecticides during the early stages of crop development to minimise the impact on beneficial insects.
- Rotate between registered insecticides that have different modes of action (eg. Group 1, Group 3, Group 4, Group 7, Group 12, Group 23, 28 and Group 29.
- Do not apply more than two consecutive applications of insecticides that have the same Mode of Action within and between seasons.
- The Modes of Action (groups) and registered insecticides for control of Silverleaf Whitefly are listed below.
Group* Chemical sub-group Example chemicals 1B Organophosphate acephate 3A Synthetic pyrethroid bifenthrin 4A Neonicotinoid acetamiprid, dinotefuran, imidacloprid, thiamethoxam 7C Pyriproxyfen pyriproxyfen 12A Diafenthiuron diafenthiuron 23 Tetronic and Tetramic acid derivatives spirotetramat Petroleum oil petroleum oil 28 Diamides Cyantraniliprole 29 Flonicamid flonicamid
Seek advice from the manufacturers and/or government advisory services to determine local resistance levels for particular mode of action Groups
Do not exceed the maximum number of applications permitted on the insecticide label.
When using insecticides to control other pests, consider the chemical group in relation to contributing to resistance development of Silverleaf Whitefly.
When using insecticides to control other pests consider the effect on beneficial insects and the potential to flare Silverleaf Whitefly populations.
Not all chemical groups listed have registered products available in all crops affected by Silverleaf Whitefly. Only use products registered for use in crop to be treated.
- In vegetable crops, ensure seedlings are free of pests prior to transplanting. Inspect transplants carefully upon arrival for whitefly eggs, nymphs and adults.
- Control alternate weed hosts of Silverleaf Whitefly 2-3 weeks before planting to reduce early population levels.
- Clean-up crop residues
- a. Where moderate population levels remain after harvest, apply a registered insecticide or oil treatment effective against adults.
- b. Plough in crops within 2-3 days of application to kill all remaining nymphs on crop foliage to reduce pest migration into new plantings.
CropLife Australia’s Resistance Management Strategies provide a guide for crop protection product rotation through product groups. The strategies are a useful tool that supports farmers’ adoption of resistance management.
All crop protection products must be handled and applied strictly as specified on the product label or APVMA permits. These Resistance Management Strategies do not replace product labels. They are a guide only and do not endorse particular products, groups of products or cultural methods in terms of their performance. It is important to check with the Australian regulator’s (APVMA) product database for contemporary information on products and active constituents. The database can be sourced through www.apvma.gov.au