【2018年必威体育精装版整理】大豆病虫害绿色防控.ppt

我国大豆的主要栽培区域 二、大豆病虫害的绿色防控 （一）“绿色植保”的概念 绿色植保就是把病虫害防治工作做为人与自然和谐系统的重要组成部分，突出其对高产、优质、高效、生态、安全农业的保障和支撑作用。 绿色防控技术的特点： 优先考虑采取生态治理、农业防治、生物控制、物理捕杀等综合防治措施，以确保农业可持续发展； 也可选用低毒高效农药，应用先进施药机械和科学施药技术，减少农药残留和环境污染。 2）物理防治 粘网阻隔 灯光诱杀 灯光诱杀成虫可有效压低虫源基数。 3）化学防治方法 药剂拌种：可用30％毒死蜱微囊悬浮剂按药种比1︰50拌种，以保护种子和幼苗。 土壤处理：在大豆播种时，采用毒土（毒肥）法，可用30％毒死蜱微囊悬浮剂7.5kg/hm2拌细沙土均匀撒施大豆种子上，然后立即覆土。 田间药剂喷雾：成虫发生盛期，在其喜食的果树、苗木和农作物上喷洒48%毒死蜱乳油、10%吡虫啉可湿性粉剂等药剂，可有效防治成虫。 大豆食叶害虫危害与大豆产量损失的关系 Animated radial list with picture (Intermediate) To reproduce the SmartArt effects on this slide, do the following: On the Home tab, in the Slides group, click Layout, and then click Blank. On the Insert tab, in the Illustrations group, click SmartArt. In the Choose a SmartArt Graphic dialog box, in the left pane, click Relationship. In the Relationship pane, click Radial List, and then click OK to insert the graphic into the slide. To enter text, select the graphic, and then click one of the arrows on the left border. In the Type your text here dialog box, in the top level bullets, enter the text for the three, smaller circle shapes in the graphic. In the second-level bullets, type the text for the bullets to the right of the three, smaller circle shapes. On the slide, select the SmartArt, and then on the Design tab, in the Themes group, click Colors, and under Built-In, select Technic. Press and hold CTRL, and on the slide, select the large circle and all three small circles. On the Home tab, in the Drawing group, click the arrow to the right of Shape Effects, point to Preset, and under Presets and select Preset 2 (first row, the second option from the left). On the slide, click on the picture icon in the center of the large circle. In the Insert Picture dialog box, select a picture, and then click Insert.  (Notes: (1) If the picture in the large circle is distorted, tile the picture as a texture by selecting the large, picture-filled circle, and then on the Home tab, in the bottom right corner of