The Studies On Seed-Coating Agents For Controlling Sphacelotheca Reiliana Clinton

Sphacelotheca Reiliana Clinton of Maize has been found around the world ,and is distributed through the soil ,the plants are infected at the seedling,while the typical symptoms wound be formed at the tasselling period , due to the severe threat of the Sphacelotheca Reiliana Clinton, the production of maize is heavily limited. The traditionally controlling methods, such as using resistant cultivar, exposing the root to the sun, rotating with different crops and spraying chemical substance, but the disease can not be controlled significantly. It was reported that the most direct, economical and effective method of controlling the disease was treating with seed-coating agent, but different types of seed-coating agent with different ingredients may have different result. Thus, it is very necessary to select the agent with the most controlling effect.Five seed-coating agents, Thiram, Raxil, and so on, and the sensitive maize cultivar Shendan 16 were used in this experiment at five different trial places, and the impacts of seed-coating agents on the date of germination, the rate of germination, disease and yield were analyzed, aiming to select a kind of seed-coating agents with high effect, low toxicity and low content of remainder, and to provide evidence for safe production of maize in Shanxi province.The result indicated that, the field control effects of the Thiram(89.5%)were quite remarkable.And integrated considerations,the control effect of Thiram was the best , it should be adopted by the seed departments.