Clare Valley farmers and residents are being warned to think before they spray summer weeds and not to underestimate the impact it could have on surrounding properties.
With recent hot weather PIRSA Biosecurity SA says producers must be careful not to spray during inversion periods.
Inversion conditions are likely in the early morning, evening and at night which in hot conditions means there are limited day times available for spraying.
Actively growing grapevines are highly susceptible to off-target herbicides, so as part of any planning process it is vitally important to be aware of sensitive crops in your surrounding area, even those many kilometres away, and check that the weather conditions are suitable.
They also include instructions for mandatory no spray zones, more clearly defined mandatory instructions for suitable weather conditions and application techniques, and detailed mandatory record keeping for all users.
For information on avoiding spray drift and best practice chemical use click HERE.