Tomato Pest And Disease Problems - Preventing, Diagnosing And Treating

Tomatoes are notoriously picky plants. Tomatoes are in the potato family, which makes them susceptible to tens, if not hundreds of pest and disease problems; however, that should not stop any tomato loving gardener from harvesting buckets of healthy tomatoes. The key is to learn how to prevent, diagnose and treat tomato problems.

Tomato Disease Prevention

Disease prevention in tomato plants starts with healthy growing practices. Preparing the soil, watering properly, and feeding appropriately are all keys to tomato disease prevention. Tomatoes like a well draining soil filled with lots of organic matter. Tomato roots penetrate deeply into the soil, helping to stabilize plants and take up water. With well-prepared soil, watering deeply and infrequently-every 4-6 days, will allow the tomato plant to have enough water, without putting the plant at risk of problems of overly "wet feet." Always water in the morning, so plant leaves have time to dry during the day. Leaves are a perfect spot for disease incubation, and water ripens those conditions even more. Prune your plants to provide air flow through the leaves and branches, which will also aid drying time. Ensure that your tomato plants receive proper nutrition by conducting a soil test, and treating the soil according to the results. All of these practices will give your plants a good start fighting off diseases and pests.

Diagnosing Tomato Pests and Diseases

If all of your well-intentioned cultivation practices have not stopped your plants from succumbing to a problem, then you must diagnose the problem. Tomatoes can suffer from pest problems, nutrition problems, viral, bacterial and fungal problems.

Pest damage to tomato plants causes visible physical changes. Cutworms actually cut off the plant from its root system, causing the plant to wilt and die. Aphid damage results in sticky residue on the plant. Aside from the damage they inflict, you can often see the pest itself on the plant. Caterpillars bury into fruit and eat it, causing fruit to rot. Whiteflies and spider mites are visible on the leaves. Diagnosing pest problems is easier than other problems because most pests can be observed on the plant.

Nutrition problems in tomato plants manifest in several areas of the plant. Tomatoes absorb a wide variety of nutrients, minerals and trace elements from garden soil. Deficiencies in each nutrient result in specific symptoms in the plant. Excess nitrogen causes deep green, lush, leafy plants with little fruit. Nitrogen deficiency causes yellowing of lower leaves. Calcium deficiency causes blossom end rot, a common problem on tomato fruit characterized by yellow, leathery spots that spread into black, rotting patches on the blossom end of the fruit. (The end away from the stem.) Nutrition problems can be seasonal, or soil related. A soil test helps determine what nutrients are lacking in the soil. If all nutrients are in the soil, factors such as overly wet or cold soil can make it more difficult for plants to absorb nutrients.

Viruses, bacteria and fungus all cause tomato diseases and problems. Wilts, damping off, leaf spots, mildew, fruit rot, cankers, and leaf mosaic problems are all common tomato problems caused by a cocktail of tiny organisms. Each problem shows in the tomato in different ways. Leaf mosaic viruses show up in leaves, causing mosaic-like patterns. Cankers are growths on stems, leaves or fruit. Root rot often shows up in the leaves of the plant, as they shrivel and die from not having enough water. For a comprehensive, pictorial guide on diagnosing tomato plant pests and diseases, consult How to Grow Tasty Juicy Tomatoes (available from www.bestjuicytomatoes.com).

Treating Tomato Pest and Disease Problems

The phrase: an ounce of prevention is worth a pound of cure definitely applies to tomato growing. As earlier related, properly caring for tomato plants and their soil prevents many problems. However, should your plants fall prey to a problem, there are many ways to treat.

First, correctly diagnose the problem. Once diagnosis is certain, follow procedures related to the particular problem. Many plant problems can be alleviated by changing gardening techniques. Plants that are stressed are more susceptible to pest and disease problems. Examine watering, mulching, and feeding practices. If those techniques are in balance, many pest and disease problems will go away. Nutrition deficiencies may be corrected by adding correct nutrients to the soil in easily accessible forms. Some nutrients are best delivered as leaf or soil drenches, while others work well in time-release granular applications. Pest problems can be corrected with beneficial insects, changes in gardening techniques, and insecticides-both synthetic and organic. Viral, bacterial and fungal problems can also be treated with a combination of gardening techniques and soil and plant drenches and sprays. Safety is an important consideration when applying any sort of pesticide. Read the label carefully and follow all directions. More is not better when pesticides are concerned.

While all of this information can seem daunting, tomato growing is a rewarding hobby. Keep a good reference on hand, and whenever your plants are under the weather, open the book and identify the problem. How to Grow Juicy Tasty Tomatoes contains over 260 colored photos of diseases, pests and common nutrition deficiencies and is a must-have for any top-notch tomato grower!

If you want more detailed tomato garden advice and tips from a world horticultural expert, visit

http://www.bestjuicytomatoes.com

Article Source: http://EzineArticles.com/?expert=Annette_Welsford

Growing Tomatoes - How to Avoid Common Problems

Flower Set and Blossom Drop

One of the most exciting moments in tomato growing is when flowers begin to fade and the first little pea-like fruits appear. Each day they grow a little bigger until they reach their mature size when they start to change colour and become ripe tomatoes. They look almost too good to eat!

However, temperatures and humidity have to be right for flowers to set fruit. If flowers fail to set, blossom drop is the result and those pretty little blooms wither and break off at the knuckle. To avoid blossom drop, mist and tap plants daily to help release pollen. If the weather is particularly hot and dry, also water around the base of plants to increase humidity.

Watering and Blossom End Rot

Watering can be a tricky business when it comes to tomatoes especially if they are grown in containers. However, correct watering can help avoid blossom end rot, which is caused by a lack of calcium when the fruits are swelling and leaves a dark leathery patch on the underside of the tomatoes.

The first aim should be to keep the entire root area moist by giving them a thorough watering once a week (especially when the fruits are swelling) and water moderately in between. The reason is that roots are only able to feed and absorb nutrients (including calcium) from areas of soil that are moist. If half of the soil that your plant is growing in is dry, calcium uptake may also be reduced by half.

Increase Aeration and Disease Control

One way to keep tomato plants healthy, especially when grown in a confined space such as a greenhouse or where they may be planted close together, is to increase aeration. This may be done by removing old, lower leaves below the first truss to improve air circulation.

Deleafing

Opinion about deleafing varies considerably. Some gardeners will leave most leaves on their plants which helps shield tomatoes from direct sunlight. Too much direct sunlight and heat can cause sun scald, greenback and blotchy ripening. Some growers, especially those who grow in greenhouses, remove all leaves below the truss that is producing ripe fruit. This enables plants resourses to be directed into the fruit rather than having to support lots of leaves. Plants grown in greenhouses do not usually have their fruit in direct sunlight for long periods, so avoid the problems of sun scald etc.

Watering and Disease

When watering, avoid splashing soil up onto the lowest leaves which may transfer soil infections into a plant through the leaves. Splashing water up onto growing fruit may also create ghost spot which is caused by grey mould soil spores and displays small transparent water-like rings.

It's also a good idea to pull off suckers, side shoots and leaf branches by hand rather than cut them because the blades of knives and scissors can spread disease from one plant to another.

Nick Chenhall has been a keen tomato grower for many years and runs his own tomato growing website. If you would like to find out more about growing tomatoes, please visit: http://www.tomatogrowing.co.uk

Article Source: http://EzineArticles.com/?expert=Nick_Chenhall