我国南方禾谷缢蚜对小麦黄矮病传播能力

TRANSMISSION POTENTIAL OF BYDV BY RHOPALO-SIPHUMPADI FROM SOUTHERN CHINA

经传毒力测试，具有南方麦区代表性的长沙、南京和杭州的介体禾谷缢蚜，对小麦黄矮病（ＢＹＤＶ）的传播能力，同样不但赶上而且超过该病优势介体麦二岔蚜。这就预示随着我国南方麦区优势麦蚜种群禾谷缢蚜传毒力的显著提高，小麦黄矮病存在着由北方麦区往南方麦区扩展蔓延的趋势。

Through several years of experiments and research it is shown that the transmission po-tential of BYDV by Schizaphis graminum has been surpassed by Rhopalos iphum padi fromthe southern wheat areas,This fact indicates that the transmission potential of BYDV byRhopalosiphum padi has been drastically rising and that this disease is expanding from thewheat areas in the north towards the wheat areas in the south.