In the plains, where temperatures are high, the pine sawyer beetle does not hibernate, and has a short breeding cycle-- "so they spread very quickly," says Dr. Chang Ruey-jang, an assistant research scientist with the Taiwan Forestry Research Institute (TFRI). Because Taiwan's area is small, the impact is even greater.
平地溫度高，天牛不冬眠，繁殖期短，「所以會傳播更快」，林業試驗所助理研究員張瑞璋說，台灣面積小，衝擊更大。