(一)茶黄螨发生与危害茶黄螨虫体很小,肉眼看不见,但繁殖很快,在28￣32℃时,4￣5天繁殖1代,在18￣20℃时,7￣10天1代,一年可发生25代左右。主要在大棚温室内繁殖危害,其危害部位为植株顶部嫩叶,当嫩叶变老时,即由老叶转向新的嫩叶,因此又称为“嫩叶螨”。叶片被害后,背面变褐色 (A) Occurrence and damage of tea yellow mite The body of small yellow tea mite, invisible to the naked eye, but reproduce quickly, at 28 ~ 32 ℃, 4 to 5 days breeding 1 generation, at 18 ~ 20 ℃, 7 ~ 10 Day 1 generation, can occur about 25 generations a year. Mainly in the greenhouses breeding harm, the harm of parts of the top leaves of young plants, when young leaves become old, that is, from the old leaves turn to the new leaves, it is also known as “spider mites.” After the leaves were killed, the back of the brown