Techniques For Intergrated Control On Root Rot Of Sugar Beet

The sugar beet root rot disease may be availably controlled by the way of which combination of agricultural management with chemical control. In 2004, 40% fenaminosulf.sulfur and 60 % fenaminosulf.quintozene were tested and have good effect. Combining the two new fungicide with varieties crop rotation, deep-plough, fertilization increase the control effect is experiment object.Control methods for sugar beet root rot such as tolerant disease varieties, crop rotation, deep-plough, fertilization and chemical funcide in the paper were experimented. The results showed that the varieties of tolerant sugar beet root rot disease, ZD209, ZD206, ZD210, BTS218, ZD303, BTS356, ZD303, KWS3418, have no more than 10% disease rate. The disease rate under crop rotation, the never planting beet soil was 0.63%, the continuous cropping was 69.13%, the every other cropping was 65.50%; the four, five, six ,seven, eight, ten-year-cycle rotation was respectively 57.65%, 21.5%, 22.30%, 14.38%, 18.25%, 8.7%. The control effect under deep-tillage was more than 20%, the sugar beet root yield was increased by 10%. The disease rates were light under the treatment of high phosphorus and potassium contents in the nitrogen, phosphorus and potassium mix fertilization trial. The control effect was 48.71% under 112.5kg nitrogen, 150kg phosphorus and 150kg potassium fertilizations per hectare. The control effect was respectively 70.74%, 55.28%, 57.08% under ratio of 40%fenaminosulf.sulfur bactericides to sugar beet seed, 1∶130, 1∶170, 1∶210, approximated 50% fenaminosulf. The control effect was respectively 58.80%, 71.38%, 74.07% under ratio of 60 % fenaminosulf .quintozene bactericides to sugar beet seed, 0.6∶100, 0.8∶100, 1∶100. In integrated control experiments, the control effect is 77.66% under 60% fenaminosulf .quintozene bactericides to sugar beet seed, 1∶100, 33cm deep-plough and fertilizer proportion of 12.5 nitrogen, 150 phosphorus and 150 potassium; the control effect is 72.68% under 40% fenaminosulf.sulfur bactericides to sugar beet seed, 1∶130, 33cm deep-plough and fertilizer proportion of 12.5 nitrogen, 150 phosphorus and 150 potassium; the control effect is 62.82% under 50% thiram bactericides to sugar beet seed, 1∶125, 33cm deep-plough and fertilizer proportion of 12.5 nitrogen, 150 phosphorus and 150 potassium. The result control effects were same trend with sugar yield of sugarbeet...