![]() ![]() Insecticides such as cabaryl or permethrin are effective controls, if needed. Wounded tissue may be more susceptible to diseases such as early blight. The adults chew small holes or pits in leaves. See Fact Sheet 5.540, Potato and Tomato Psyllids.įlea beetles (Figure 3) are small, black or brown beetles that jump when disturbed. For best control, dust the foliage, especially the undersides, with sulfur. They are sedentary while feeding and secrete small, white granules that resemble sugar. At first, they are yellow, then they turn green. To confirm psyllids, check the undersides of leaves for nymphs. Stems may become distorted, giving the bush a zig-zag appearance. They feed on tomato or potato plant sap and inject a toxic saliva that causes the characteristic “psyllid yellows.” Leaves turn yellow veins often turn purple. Psyllids (Figure 2) are more commonly found in eastern Colorado and are seldom a problem in western Colorado. ![]() Use row covers to protect tomato plants from the leafhopper. Hot, dry springs with predominantly southwest winds usually indicate increased problems with this disease. It is difficult to control because leafhoppers migrate from southern areas. Leaves and stems become stiff fruit ripens prematurely. Upper leaflets roll and develop a purplish color, especially along the veins. Infected plants turn yellow and stop growing. This problem is common in western Colorado but seldom found in eastern Colorado. Once soil temperatures rise, the problem usually corrects itself.Ĭurly top virus is transmitted by the beet leafhopper. Don’t plant tomatoes too early in the season. Phosphorus is abundant in our soils but may be unavailable to the plant when the soil is too cold. Phosphorus deficiencies (Figure 1) occur early in the growing season when soil is still cool. It is organized by affected plant parts: leaves, stems, roots and fruit. The key in Table 1 will help you narrow down the cause. To manage pests, identify the source of the problem by assessing the symptoms. Space plants for maximum air circulation.įailure to follow one or more of these steps can lead to pest problems.Keep the plant growing vigorously with proper water and nutrients.Improve garden soil by adding organic material such as compost. ![]() Good cultural practices can reduce or eliminate many problems.ĭespite the short growing season in many areas of Colorado, tomatoes are an easy and popular vegetable to grow.Assess the symptoms, then make the appropriate treatment.Tomato problems may be caused by nutrient deficiencies, diseases, fungi or insects.Tomatoes are an easy and popular vegetable to grow. ![]()
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