Seaweeds tested for pest control

Seaweed extracts are typically used by growers with the aim of improving tree growth and enhancing fruit yields and quality. Although the extracts are regulated and marketed as plant growth regulators, entomologists have been studying whether the products could also have benefits in terms of pest control. Results of a study conducted in Washington State suggest that seaweed extract applications can reduce pest mite populations. However, in experiments in Vermont, the extracts had little effect on the incidence of mites or most other pests, but did reduce fruit ­damage from apple maggot on some apple varieties. Dr. Holly Little, market […]