Control of Tomato Powdery Mildew in Greenhouse of Dry Aeolian Sand Region

It was studied on several pesticides controlling tomato powdery mildew in greenhouse of dry aeolian sand region and the efficacy was put to the proof. The results showed that kresoxim-methy1 50% WG,flusilazole 8% ME,triadimefon 25% WP and chlorothalonil 75% WP had better control effect. The effi cacy range of four kinds of fungicides against Tomato powdery mildew was from 59.0 to 83.22% in 7 days after treatment and from 72.87 to 87.99% in 12 days of twice treatment,respectively. These fungicides with the experiment dosages were safe to tomato and no chemical injury.