Application of invasive weed Wedelia trilobata to killing of prodenia litura larva

The invention discloses application of invasive weed Wedelia trilobata to killing of prodenia litura larvae and belongs to the environment-friendly technical field of killing pests by using invasive plant resources. Wedelia trilobata extract solution is applied to crops to directly kill prodenia litura larvae. The invasive weed Wedelia trilobata which is commonly seen in South China areas is used to realize reasonable and effective development and utilization of plant resources; dry leaf weight of Wedelia trilobata used in the preparation of the Wedelia trilobata extract solution is 50 to 200g. By using the invasive weed Wedelia trilobata to effectively kill the agricultural pest prodenia litura larvae, the operation is simple and easy to perform, the effect is good, the cost is extremely low and the method is a healthy, pollution-free, environment-friendly and ecological method for preventing and controlling agricultural pests. 本发明公开了入侵杂草南美蟛蜞菊在杀灭斜纹夜蛾幼虫中的应用，属于利用入侵植物资源进行杀灭害虫的环境友好型技术领域。该方法通过在农作物上施加南美蟛蜞菊提取液，直接杀灭