40％新星乳油（护矽得）系美国杜邦公司最近开发研究出的防梨黑星病的特效农药。新星为三呼吐类杀菌剂，其杀菌机制为抑制病菌麦角自醇含成，使病菌死亡。新星农药具有如下特点。1．具有较好的内吸性。喷布于梨树后，药剂可迅速被叶片、果面吸收。防治效果不受施药3～4小时后降 40% Nova Star Cream (Silicone) is the United States DuPont recently developed a special anti-pear scab of pesticides. Star for the three breath spit class fungicides, the bactericidal mechanism for the inhibition of germs containing alcohol from the germs, so that bacteria die. Nova pesticide has the following characteristics. 1. Has good internal absorption. Spray in the pear tree, the agent can be quickly leaves, fruit surface absorption. The control effect is not applied 3 to 4 hours after the drop