Maize Rough Dwarf Disease Prevention And Control Technology,

Corn Viral Diseases is the main disease in production of com, rough dwarf viral disease of corn as one of the Com Viral Diseases has became more and more serious Since 1989 in Zhao Yuan and it has spread from local outbreaks to universal one. According to the general survey of the plant protected station of Zhao Yuan in 2003, the rate of farmland infected by the Corn Viral Diseases has reached 83.6%, concretely the rate of spring corn field has reached 100%,the rate of wheat undersowinmg corn field has reached 88.6%. The rate of common corn field has reached 33%.The rate of reduction of output is generally about 15-20% per unit of area and 40-50% in more serious area, even 100% in the most serious area. Before the integrated management research on the Corn Viral Diseases, researchers usually mix seeds with pesticide to control the overground or underground pest in the period of sprouting, but it has little significance to the Corn Viral Diseases.Thanks to 2003-2005's hard work, we investigate and comprehend the basic situation of Corn Viral Diseases, which contains its occurrence , distribution and trend, we make sure the rate of the plant infected is beyond 5%, the rate has significance of effect on output of corn. It is the guidance of the management in much more field. Then we get a mainly method of Corn Viral Disease, it is based on seed mixed with pesticide firstly and secondly control small brown plant hopper-the vector for virus spreading. It has been used as the integrated management technology measure of the whole farmland. According to many experiments' filtrating, We get two well effect combinations with the technology. In the most serious area, the trails prove that the two combinations can make the control effect improve to 80%, per unit of area increase production above 150 kilograms, and the farmers increase their income about $160, and in the demonstrated area, the trails prove that the two combinations can make the control effect improve to 90%, per unit of area increase production above 110 kilograms, and the fanners increase their income about $120. The two both have significance of effect on the Corn Viral Diseases.