Various – Silverleaf Whitefly (Bemisia tabaci)

Crop:          Various
Insect(s):  Silverleaf Whitefly (Bemisia tabaci)

Guidelines:

1. Monitor pest numbers and apply control measures before adult populations reach high levels.
2. Select registered insecticide control measures according to the primary growth stage of the pest, the infestation level and the age and type of crop.
3. In cotton, spray decisions should be based on the Silverleaf Whitefly threshold matrix. Refer to the current Cotton Pest Management Guide for further details
4. Where possible, utilise selective insecticides during the early stages of crop development to minimise the impact on beneficial insects.
5. 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. 
6. DO NOT apply more than two consecutive applications of insecticides that have the same Mode of Action within and between seasons.
7. The Modes of Action (groups) and registered insecticides for control of Silverleaf Whitefly are listed below.
   

   Group*	Chemical sub-group	Example chemical
   1B	Organophosphate	acephate
   3A	Synthetic pyrethroids	bifenthrin
   4A	Neonicotinoids	acetamiprid, dinotefuran, imidacloprid, thiamethoxam
   4D	Butenolides	flupyradifurone
   7C	Pyriproxyfen	pyriproxyfen
   12A	Diafenthiuron	diafenthiuron
   16	Buprofezin	buprofezin
   23	Spirotetramat	spirotetramat
   –	Petroleum oil	petroleum oil
   28	Diamides	Cyantraniliprole
   29	Flonicamid	flonicamid

    

   *Refer: CropLife Australia Expert Committee on Insecticide Resistance Mode of Action Classification for Insecticides

8. Seek advice from the manufacturers and/or government advisory services to determine local resistance levels for particular mode of action Groups

9. DO NOT exceed the maximum number of applications permitted on the insecticide label.

10. When using insecticides to control other pests, consider the chemical group in relation to contributing to resistance development of Silverleaf Whitefly.

11. When using insecticides to control other pests consider the effect on beneficial insects and the potential to flare Silverleaf Whitefly populations.

    NOTE:

    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.

Cultural Practices:

1. 1. In vegetable crops, ensure seedlings are free of pests prior to transplanting. Inspect transplants carefully upon arrival for whitefly eggs, nymphs and adults.
   2. Control alternate weed hosts of Silverleaf Whitefly 2-3 weeks before planting to reduce early population levels.
   3. 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.

Notes regarding the application of insecticides:

1. To ensure the most effective control of the pest:

• Product labels should at all times be carefully read and adhered to;
• Full recommended rates of registered insecticides should always be used; and
• Ensure good coverage of the target area to maximise contact.