不同木薯品种对二点红蜘蛛的抗性观察

Resistances of different cassava varieties to Tetranychus urticae

研究华南5号、华南6号、华南7号、华南8号、华南10号、南植199等木薯品种对二点红蜘蛛的抗性,以及各木薯品种叶片颜色、质地及厚度与抗性的关系。结果表明,不同木薯品种对二点红蜘蛛的抗性存在差异,其中华南7号、华南8号抗性最好,华南5号、华南10号、南植199次之,华南6号最差;品种抗性与叶片颜色及质地有关,叶片深绿色、腊质层较厚的品种抗性较好,叶片浅绿色、没有腊质层的品种抗性较差。

In the present experiment, the resistances of different cassava varieties including SC 5, SC 6, SC 7, SC 8, SC 10, and Nanzhi 199 to Tetranychus urticae were analyzed, as well the relationships between the resistance and the color, texture and thickness of leaves of the cassava varieties. The results showed that the resistance of different cassava varieties to Tetranychus urticae was different, the resistance of SC 7 and SC 8 was the best, followed by SC 5, SC 10, Nanzhi 199, and SC 6 was the worst. The resistance was related with leaf color and leaf texture. Cassava varieties with dark green leaf and thick wax layer showed better resistance, and those with light green leaf and without wax layers had weaker resistance.