Therefore a prophylactic preventative programme is a reliable substitution for fungicides and runs no risk of resistance developing.
Over the next few weeks, similar results are expected on downy mildew, mealybugs and thrips. These are all difficult targets, even for chemical fungicides and insecticides. But even after two weeks – the Scarab maps are showing significant improvements using higher rates of biopesticides and shorter spray intervals for curative programmes.
Lower spray volumes of water are key to the success of biopesticides. They must not be sprayed to ‘run-off’. Successful bio-intensive growers have had excellent results with just 800 litres of water volumes per hectare for pest and disease control.