Whiteflies and thrips are major insect pests that cause serious crop damage each year. Insecticide resistance is a major obstacle to the effective control of these pests. Monitoring insecticide resistance is a key step for early warning and resistance management which requires an accurate and convenient methodology. The main benefits of the agar leafdipping method for whitefly adults and the leaf tube residue method for thrips are that they are quick and easy to operate. Preparatory work can be completed one or two days ahead of introducing the insects. Also, both methods can monitor the resistance level of the F0 generation, which is closer to the field situation. These two methods are therefore suitable for promotion for use in monitoring insecticide resistance in whitefly and thrips.