Silverleaf whitefly on cotton: The economic damage threshold for whitefly control is 5 adults or 10 larvae per leaf. Cotton aphid: If 50% infestation is found after dilution during the seedling period, spraying is recommended. If an average of 25 aphids are found on one leaf in the field period, spraying is recommended. Leafhopper on cotton: During the periodic inspections which are carried out at least once a week, when the density of 10 adults or nymphs per leaf is reached and there is a tendency for the population to increase, chemical control should be decided. Potato beetle on potato: For sampling, the field is entered in the direction of diagonal lines and searched for eggs, larvae, and adults of the pest. If any of them is found, this means that the field is infested. If the first generation is to be sprayed, it should be done when the first mature larvae (4th period) are seen on the plants. If the second generation is sprayed, egg hatching must be completed. Since the plant can tolerate damage due to insect density during this period, spraying may not be necessary. Tomato, Silverleaf whitefly: The greenhouse/field where an infestation of silverleaf whitefly and greenhouse whitefly has been detected is entered in the direction of the diagonal lines. Every 5 steps, 50 leaves are collected from the bottom, middle and top leaves. Control begins when there are 5 larvae-pupae per leaf. Against pistachio psyllid: If 20-30 nymphs per leaf are found in weekly counts on 100 combined leaves, spraying should be performed before most eggs hatch and before the first adult parasitoids appear and form a sticky layer (fumagine) on the leaf surface. Apple aphid: If 15 out of 100 shoots are infested during the vegetation period, it should be applied. Watermelon Peach aphid: The field is entered in the direction of the diagonal lines to determine the time of application from April, and every 3 to 5 steps, a leaf is randomly selected among the fresh leaves and shoots of the plants. When large-leaved plants like watermelon have 10-20 aphids falling on one leaf, it is necessary to start applying.