The lower foliage on my tomatoes is beginning to turn yellow and drop. The leaves have circular dark brown to black spots.

The lower foliage on my tomatoes is beginning to turn yellow and drop. The leaves have circular dark brown to black spots.
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1 Answer

Answer :

A. This is Alternaria leaf spot or early blight, a common problem on tomatoes that causes defoliation usually during periods of high rainfall. Plant tomatoes on a raised bed to improve water drainage, and space them so air can move to dry the foliage and prevent diseases. Start a fungicide spray program when the fruit is set and continue at one-week intervals during the growing season until harvest. Use a fungicide such as Daconil approved for home garden use.
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Related questions

The foliage on my tomatoes is covered by small circular-shaped spots that cause it to turn yellow and drop off. This occurs in all seasons and is on the top and bottom leaves.

Description : The foliage on my tomatoes is covered by small circular-shaped spots that cause it to turn yellow and drop off. This occurs in all seasons and is on the top and bottom leaves.

Last Answer : A. Several types of leaf spots attack tomatoes. Septoria leaf spot quite often starts at the bottom of the plant and rapidly spreads. It can be controlled with a fungicide spray. Begin the spray program early in the life of the plant.

What causes large, black spots on the bottom or blossom end of my tomatoes?

Description : What causes large, black spots on the bottom or blossom end of my tomatoes?

Last Answer : A. Blossom-end rot is caused by improper moisture conditions. This results in a calcium deficiency in the developing fruit. Make sure the soil pH is above 6.0. Maintain uniform soil moisture as the fruit grows. Remove affected fruit. When possible, use calcium nitrate to fertilize the plants.

My tomato plants are stunted and have pale yellow foliage. The root system has knots or swelling on the roots.

Description : My tomato plants are stunted and have pale yellow foliage. The root system has knots or swelling on the roots.

Last Answer : A. These are root-knot nematodes. Some varieties such as Celebrity and Better Boy resist this problem. It is best to use only nematode-resistant varieties. Nematode resistance is shown by the letter N after the name; for example, Celebrity VFN.

My tomato fruits have small yellow specks on the surface. When the fruit is peeled, those yellow specks form a tough spot that must be cut off before eating the tomatoes. What is wrong?

Description : My tomato fruits have small yellow specks on the surface. When the fruit is peeled, those yellow specks form a tough spot that must be cut off before eating the tomatoes. What is wrong?

Last Answer : A. The yellow speckling is caused by injury from sucking insects such as stinkbugs or leaf-footed bugs. Early control of sucking insects that feed on the fruit is necessary to reduce the problem.

We planted tomatoes in our small garden. They are loaded and are the best tomatoes we have ever had; however, there are some small holes near the stem end of the tomato. When we cut the tomato open, there is a small worm inside. What is it and what can we do?

Description : We planted tomatoes in our small garden. They are loaded and are the best tomatoes we have ever had; however, there are some small holes near the stem end of the tomato. When we cut the tomato open, there is a small worm inside. What is it and what can we do?

Last Answer : A. Your fruit has been invaded by the tomato pinworm. They usually do not damage all fruit and can be controlled only by a preventive insecticide spray every 7 to 10 days. When the damage is evident, it is too late to do anything about it.

When caging tomatoes, how large are the cages?

Description : When caging tomatoes, how large are the cages?

Last Answer : A. The diameter of the cage should be at least 18 to 20 inches at the top. Smaller cages often restrict plant growth and reduce yields. Height of the cage varies, but generally 3 1/2 feet is ... is preferred. Whatever cultivar, a cage 3 1/2 feet tall is sufficient for most fall garden tomatoes.

Will tomatoes become fully ripe and red if they are harvested early?

Description : Will tomatoes become fully ripe and red if they are harvested early?

Last Answer : A. Yes. Fruits harvested at the first blush of pink will ripen fully. A tomato picked at the first sign of color and ripened at room temperature will be just as tasty and colorful as one left to fully mature on the vine. Picking tomatoes before they turn red reduces bird and squirrel damage.

My tomatoes were healthy during the spring and early summer; yet after a rain, they wilted and died very rapidly. I found a white fungal growth at the base of the plant.

Description : My tomatoes were healthy during the spring and early summer; yet after a rain, they wilted and died very rapidly. I found a white fungal growth at the base of the plant.

Last Answer : A. This is southern blight, a soilborne fungus that lives on organic material in the soil. Deep burial of undecomposed organic material in the soil reduces this problem. Control foliage diseases of ... up near the plant and cause damage. Crop rotation also reduces the incidence of southern blight.

If tomatoes are picked green or before they are fully mature, how should they be handled to ensure proper ripening and full flavor?

Description : If tomatoes are picked green or before they are fully mature, how should they be handled to ensure proper ripening and full flavor?

Last Answer : A. Never refrigerate tomatoes if immature when picked. Place them in a single layer at room temperature, and allow them to develop full color. When fully ripe, place them in the refrigerator where they can be stored for several weeks.

What causes the lower leaves of my tomato plants to roll up?

Description : What causes the lower leaves of my tomato plants to roll up?

Last Answer : A. Leaf roll (curling of the leaflets) is a physiological condition that occurs most commonly when plants are trained and pruned. Any type of stress can cause leaf roll. It does not affect fruiting or quality, and it is not a disease.

What causes my upper tomato leaves to turn yellowish and fall off?

Description : What causes my upper tomato leaves to turn yellowish and fall off?

Last Answer : A. Many conditions may cause these symptoms, including spider mites, diseases and nutrient deficiencies. Examine the underside of the leaves for small, red to greenish mites. If you find mites, treat with two to three applications of insecticides at five-day intervals.

What causes the flowers to drop off my tomato plants?

Description : What causes the flowers to drop off my tomato plants?

Last Answer : A. During unfavorable weather (night temperatures lower than 55 degrees F or above 72 degrees F and day temperatures above 95 degrees F with dry, hot winds), tomatoes do not set fruit and the flowers drop. The problem usually disappears as the weather improves.

My tomato plants look great. They are dark green, vigorous and healthy. However, flowers are not forming any fruit. What is the problem?

Description : My tomato plants look great. They are dark green, vigorous and healthy. However, flowers are not forming any fruit. What is the problem?

Last Answer : A. Several conditions can cause tomatoes to not set fruit. Too much nitrogen fertilizer, nighttime temperatures over 75 degrees F, low temperatures below 50 degrees F, irregular watering, insects such as thrips or planting the wrong cultivar may result in poor fruit set.

My tomato plants wilted rapidly. When I cut the stem open, I found a brown ring around the inside.

Description : My tomato plants wilted rapidly. When I cut the stem open, I found a brown ring around the inside.

Last Answer : A. This is fusarium wilt caused by a soilborne fungus that attacks tomatoes and other crops. Use resistant varieties to control this disease. Most commercial tomato varieties are resistant. Before you plant ... . This resistance is denoted by the letter F after the name; for example, Celebrity VFN.

What causes the young leaves of my plants to become pointed and irregular in shape? I noticed the twisting of the leaves and stems after spraying the plants for the first time.

Description : What causes the young leaves of my plants to become pointed and irregular in shape? I noticed the twisting of the leaves and stems after spraying the plants for the first time.

Last Answer : A. Your tomato plants have been injured by 2,4-D or a similar weed killer. Never use the same sprayer for weed control in your vegetable garden you used on your lawn. Drift from herbicides ... can also injure tomato plants. A virus disease called cucumber mosaic virus (CMV) can mimic these symptoms.

What causes a tomato fruit to crack? What can I do?

Description : What causes a tomato fruit to crack? What can I do?

Last Answer : A. Cracking is a physiological disorder caused by soil moisture fluctuations. When the tomato reaches the mature green stage, reduce or cut off the water supply to the plant as the tomato ... moisture fluctuation. Some varieties are resistant to cracking, and we try to recommend these varieties.

Are there really low-acid tomato varieties?

Description : Are there really low-acid tomato varieties?

Last Answer : A. Some varieties are less acidic than others. Some yellow-fruited types are slightly less acidic than the normal red varieties. Flavor differences between varieties are not because of differences in acid ... but the sugar-to-acid balance. Cherry tomatoes are higher in both sugar and acid levels.

What causes some of my early tomato fruit from the spring garden to be oddly shaped and of poor quality?

Description : What causes some of my early tomato fruit from the spring garden to be oddly shaped and of poor quality?

Last Answer : A. This condition is usually caused by stress and low temperatures during flower formation, bloom and pollination. Fruit set when temperatures are 55 degrees F or below often are odd- ... temperature conditions and grow into abnormal, oddshaped fruit. Another name for this disorder is catfacing.

How do you select good transplants at nurseries or garden centers?

Description : How do you select good transplants at nurseries or garden centers?

Last Answer : A. First, select the right cultivar. Look for plants that appear healthy, dark green in color and do not have any spots or holes in the leaves. The ideal tomato transplant should have five leaves and no flowers. Avoid tall, spindly plants with weak stems and leathery purple leaves.

Chicken with Shiitake Tomato Sauce

Description : Chicken with Shiitake Tomato Sauce

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Tuna-Macaroni with Spicy Tomato Sauce

Description : Tuna-Macaroni with Spicy Tomato Sauce

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Description : Baked Cheese with Tomato Sauce

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What would make a tree turn yellow and have brown spots on leaves ...we are just heading into summer in Nv.

Description : What would make a tree turn yellow and have brown spots on leaves ...we are just heading into summer in Nv.

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Description : tomatoe plant leaves turn yellow w/brown spots and die from ground up, what is wrong?

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Black spots on leaves of mandevilla. Leaves turn yellow. What can I do?

Description : Black spots on leaves of mandevilla. Leaves turn yellow. What can I do?

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Tomato plant leaves start to die and turn yellow with black spots, what is this and what can I do for it?

Description : Tomato plant leaves start to die and turn yellow with black spots, what is this and what can I do for it?

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why do the leaves turn yellow with black spots on my hibiscus tree?

Description : why do the leaves turn yellow with black spots on my hibiscus tree?

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My tomatoes have curled leaves with tiny black spots what do I do

Description : My tomatoes have curled leaves with tiny black spots what do I do

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why am i getting large dark spots on my large green tomatoes before they rippen

Description : why am i getting large dark spots on my large green tomatoes before they rippen

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large brown spots on the bottom of tomatoes

Description : large brown spots on the bottom of tomatoes

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why do my green tomatoes have brown spots on the bottom?

Description : why do my green tomatoes have brown spots on the bottom?

Last Answer : possibly too much watering

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Description : i have a foliage and the leaves are turning brown how do i take care of this

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Description : What causes a the end of a yellow squash to turn dark brown and shrivel up?

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Which one of the following is the name of the nematode, which lives as internal parasite of buds and foliage of Chrysanthemum and strawberry and causes distortions and crinkling of foliage, and leaf spots ? (A) Aphelenchoides besseyi (B) Pratilenchus thornei (C) Meloidogyne incognita (D) Aphelenchoides ritzemabosi (E) None of these

Description : Which one of the following is the name of the nematode, which lives as internal parasite of buds and foliage of Chrysanthemum and strawberry and causes distortions and crinkling of foliage, and ... (B) Pratilenchus thornei (C) Meloidogyne incognita (D) Aphelenchoides ritzemabosi (E) None of these

Last Answer : (C) Meloidogyne incognita

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Description : why did my pepper plants get spots on the leaves that turn brown and then the leave will wilt

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Description : my bartlette pear trees leaves are turning yellow early with brown spots and some pears look like they are dying early?

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Description : why are my red potato leaves turning yellow with brown spots

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Description : Brown & yellow spots on geranium flower leaves, what should I do?

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what turns mandevilla leaves yellow with little brown spots

Description : what turns mandevilla leaves yellow with little brown spots

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Description : my avocado tree has yellow leaves with brown spots

Last Answer : Mix 1/2 cup of vinegar with 32 oz of water, add one small egg, stir thoroughly, and water your tree with the mixture at day break. Do not repeat the mixture. The mixture will give the tree the nutrients that it needs and it will heal itself.

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