药剂防治亚麻白粉病效果及经济效益分析

Effect and Economic Benefit of Fungicide Control Powdery Mildew in Flax

几种供试药剂防治亚麻白粉病结果表明,第3次使用药剂后20d的防治效果达到94%以上;且对亚麻生长安全。与对照相比,药剂防治区亚麻原茎的经济性状较好、麻籽的千粒重较高、优质亚麻原茎所占比例较大。通过亚麻白粉病药剂防治,亚麻原茎和麻籽的产量、产值显著提高,投入产出比达到1∶9.49,经济效益十分显著。生产防治时需注意,发病初期和发病较轻的田块使用12.5%睛菌唑EC2000倍液、12.5%烯唑醇wp500倍液、50%硫磺·三唑酮SC500倍液;发病比较严重的田块使用40%氟硅唑EC8000倍液、10%苯醚甲环唑WG4000倍液。

Several fungicides were used to control flax powdery mildew in this experiment, the result showed that control rate can reach more than 94% after 20 days of the third time application of the ehemieals. And these fungicides showed no harm to flax growth. The economic traits of flax stem in the chemical treated area was better than the control area, the thousand seeds weight and the proportion of the original stem were also higher than the control. After fungicides treatment, the yield and output value of flax stem and seed increased significantly, the input-output ratio reached 1：9.49 and the economic benefit was remarkable. In the early stage of disease development and in field with lower incidence of the disease, 12.5% myelobutanil EC （1：2000 dilution）, 12.5% diniconazole WP （1：500 dilution） and 50% sulfur＋triadimefon SC （1：500 dilution） are recommended for powdery mildew controL If the disease were serious, the 40% Flusilazole EC （ 1 ： 8000 dilution） and 10% difenocnazole WG （ 1：4000 dilution） should he used.