Abamectin insecticide synergist and application method thereof

The invention discloses an abamectin insecticide synergist and an application method thereof. The abamectin insecticide synergist comprises the following raw materials by volume percent: 80-95% of vegetable oil and 5-20% of emulsifier. The abamectin insecticide synergist is mixed with 5% (weight percent) of abamectin insecticide and then fully stirred, and the volume ratio of the abamectin insecticide synergist to the 5% (weight percent) of the abamectin insecticide is 2.5: 1-20: 1. Tests prove that when the using quantity of abamectin is the same, the insecticidal effect after adding the synergist can be obviously improved; and when the control efficiency is the same, the using quantity of the abamectin can be reduced by above 50%. For example, when 0.5% of abamectin EC is diluted with water to 1ml/L, the killing rate of wheat aphids is only 57.41%, and the killing rate of the wheat aphids after adding the synergist can be improved to 60-100%. Therefore, the vegetable oil is the good synergist for the abamec