论文部分内容阅读
黑穗醋栗是目前黑龙江省开发利用的小浆果中发展速度快、种植面积较大、经济效益较高的重要果树之一。1986年底种植面积已达22.7万余亩,预计“七五”期间发展到50万亩,2000年发展到100万亩。然而,黑穗醋栗白粉病是导致黑穗醋栗严重减产的主要病害之一,该病在黑龙江省黑穗醋栗栽
Black currant is one of the most important fruit trees in the development and utilization of small berries in Heilongjiang Province which is characterized by rapid development, large planting area and high economic benefits. By the end of 1986, the cultivated area has reached more than 227,000 mu. It is estimated that the area will develop to 500,000 mu during the “Seventh Five-Year Plan” and to 100 million mu in 2000. However, black currant powdery mildew is one of the major diseases that lead to the serious yield reduction of black currant. The disease is found in black currant