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Tomato Insects and Disease

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Tomato Insects and Disease

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Tomato Insects and Disease

Seeds and Transplanting
Insects and Diseases

Condition Appearance Cause Solution
Blossom End Rot The bottom of tomatoes that are beginning to ripen turn black or brown. Uneven water supply or calcium deficiency. Side dress plants with lime, and water regularly during prolonged dry spells.
Splitting Fruit splits open as it grows. Too much water. If overabundant rain is the problem there isn't much you can do. Try growing resistant varieties.
Catfacing Swollen areas and creases on the fruit. Abnormal development of the flower and cool weather. ---
Blossom Drop Early blooms drop off of plants. Night temperatures below 55 degrees. Plant resistant varieties.
Leaf Curl Curled or rolled leaves. Heavy pruning. This condition will not effect the crop.
Sunscald Yellowish-white patches on tomatoes. Too much sun. Plant varieties that develop heavy foliage and don't overprune.
Early Blight Brown spots on leaves, surrounded by yellow. Fungus. Mulch to prevent splashing and use tomato dust. MN EXTENSION SERVICE
Condition Appearance Cause Solution
Late Blight Leaves develop large brown spots and wither. Brown spots on fruit. Fungus. Destroy affected plants and plant resistant varieties.
Leaf Spot Leaves have small spots with light centers. They may turn yellow and drop off. Occurs mainly in the southeast. Fungus. Rotate crops and plant resistant varieties.
Aphids Tiny (less than 1/10 inch) soft bodied pear shaped insects with whiplike antennae. Varied in color. Leaves turn yellow. Insect Plant alliums such as garlic and chives. Anise, coriander, nasturtiums, and petunias may be helpful. Use yellow sticky traps or yellow dishes containing soapy water. Soap-Shield and mint tea spray is highly effective. Lacewings will eat 100 aphids per day.
Flea Beetle Notorious jumping insects, most under 1/10 inch long. Wide range of colors. Insect Keep the garden clean and free of debris. Wormwood Spray and Red Pepper Spray are effective.
Condition Appearance Cause Solution
Colorado Potato Beetle These predators will strip the plant of foliage. Adults are 1/3 inch long with a hard round outer shell. Creamy yellow with ten black stripes. Larvae are reddish with two rows of black dots, black head and legs. Insect and Larvae. Rotate crops in the Solanaceae family which include potatoes, tomatoes, eggplant, and peppers. Interplant with horseradish, dead nettle, catnip, coriander, nasturtiums, and tansy. Spray with cedar or basil tea or a solution of 2 tbs. Epsom salts in a gallon of water.
Hornworms They devour huge amounts of leaves and sometimes fruits. They leave behind waste that resembles rabbit pellets. Caterpillars are 4 inches long and green with 7 or 8 white stripes down the sides, shadowed by black dots and ending in a false eye spot. Can't miss them. Caterpillar Fall tilling helps to destroy underground pupae. Rotating crops helps. Interplant with borage (this also improves tomato flavor) opal basil, and marigolds. Dill is a good trap crop. Spray with Bticon They are easily handpicked.
Stinkbugs These hard backed gray bugs exude a stinking fluid when touched. Younger bugs are brown. Tips of leaves will wilt. Insect They drop off plants when disturbed. Try knocking them into a can with a stick. Lizards will eliminate them.

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