用黄瓜花叶病毒（ＣＭＶ）卫星ＲＮＡ生防制剂Ｓ＿（５２）免疫辣椒，能防治辣椒由ＣＭＶ引起的病毒病。用Ｓ＿（５２）免疫接种辣椒的大田对比试验，防效达５９．５－７１．０％，产量比对照增加２６．１－３２．２％，产值增加３３．５－４５．２％。小区对比试验，用Ｓ＿（５２）免疫接种５０天的辣椒，防效达７１．３－９２．９％，免疫接种８０天，防效达５５．９－７８．５％，产量比对照增加３６．０－６５．３％，产值增加４９．３－９３．５％，还有刺激生长，促进早熟和增强对真菌、细菌病害抵抗作用。

The popper plants preinoculated with CMV satellite RNA biological control agent S52 were resiatant to infection ot CMV,The result of the field test in large area indicated that when pepper plantspreinoculated with S52 the protection effect was 59.5-71.0% compared with control plants,thefruit yield was increased by 26.1-32.3% and the output value was increased about 33.5-45.2%.While the result of the field test ln small area showed that pepper plants preinouclated with S52,showed a protection effect of 71.3-92.9% and 55.9-78.5% at 50 and 80 days postinoculation rospectively,the fruit yield and output value were 36.0-65.3% and 49.3-93,5% more than that ofthe control.The biological control agent also has some favourite effects on the plants such as stimutinggrowth,promoting early-maturation,and increasing resistance to fungal and bacterial diseases.