The 70% fenpromizil water dispersible granules from Italy's Sysmex company contain 25% of azoxystrobin and 50% of tebuconazole, which is registered for the control of rice sheath blight. In 2014, the company arranged field trials of the drug against wheat scab and powdery mildew in Yandu and Jiangdu.
The experiment was conducted in a rice field with rice and barley. The wheat variety Yangmai 20 was sown on November 15, 2013. On April 24, 2014, wheat was sprayed for the first time at the heading stage, and wheat was sprayed for the second time on May 1st at the flowering stage. Use 75% fenoxamate water dispersible granules per acre for 10g and 20g respectively, set up 47% polyketide wettable powder 100g/mu and 40% fentanyl carbendazim suspension 70ml/mu One control agent treatment and blank control. 40 kilograms of water per acre was applied with a knapsack sprayer.
After 20 days of the second drug (May 20) investigation, 10 grams of the drug per acre had 85.4% control effect on scab, which was higher than 47% of polyketone WP; The control effect of g treatment on scab was 88.1%, which was higher than that of two control agents. The control efficacy against powdery mildew of 10 grams and 20 grams per acre was 88.4% and 93.86%, respectively, which were higher than those of the two control agents.
When the wheat matures, it is treated with 10 grams per acre, and 707 grains per 20 ears, which is 20.6% more than that of the blank control, similar to that of the two control agents. 20 The grain weight per spike is 28 grams, which is 20.5% higher than the blank control. Higher than two control agent treatments. Treated with 20 grams per acre, 772 grains of 20 ears and 29.9 grams of grain weight were increased by 27.4% and 28.6% respectively compared with the blank control, which were higher than those of the two control agents.
The test results and the use of multiple sites showed that 75% fenoxamitoxil water dispersible granules were used twice in the heading and flowering period of wheat, with 10 to 15 grams of water and 40 kilograms of water spray per acre. Diseases and powdery mildew have better control effects, and wheat is ripe at the late stage, which can significantly increase seed setting rate and 1000-grain weight and increase yield.
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