Brassica Integrated Pest & Disease Management
This 4-page factsheet provides details of integrated approaches to managing Diamondback moth (DBM), a major insect pest of Brassica vegetable crops that has the abilitiy to rapidy become resistant to insecticides, and Clubroot, a disease of Brassica crops that can also infect criciferous weeds (eg wild turnip and wild radish). Tools have been developed under a HAL-funded project to assist growers and consultants to better manage DBM, including a handbook, “Integrated Management of Diamondback Moth in Crucifers”, with sections on crop monitoring, insecticide resistance management, the role of Bt (Bacillus thuringiensis), natural enemies of DBM, other pests of Brassica crops and a chart showing the impact of insecticides on natural enemies of DBM. In the case of Clubroot, the integrated management approach aims to achieve a soil environment that ensures the spore population remains below the threshold required for disease development. This is best achieved using a combination of management techniques including: improved hygiene, modification of the soil (eg liming to achieve of a soil pH of 7.0 – 7.5), crop rotation, wise use of fungicides, and evaluation of the risk of clubroot before making planting decisions and to guide implementation of integrated management techniques.