Typical Nematode Damage“T” This letter is for the Tobacco Mosaic Virus. This disease can be a problem when resistant varieties are not used and frequent handling of plants is involved. Many strains of the virus exist, affecting many unrelated plants in different families. Handling plants often such as transplanting, staking them up, and pruning can effectively spread the virus. Infected leaf and root debris as well as seeds are common sources of the virus The virus can survive in the plant debris for varying periods, up to 2 years under dry conditions. This is why it is important if you are a smoker to make sure you wash your hands very well before handling your Tomato plants, it can actually remain in your cigarettes and be transmitted that way. Symptoms first appear about 10 days after plants become infected. Symptoms appear as light and dark green mottled areas on leaves. Leaves on infected plants are often small, curled, and puckered. Plants infected early in their development are stunted and have a yellowish cast. Symptoms may vary depending on virus strain, time of infection, variety, and environmental conditions. The virus can reduce size and number of fruit produced. The earlier a plant becomes infected, the greater the loss.Typical Tobacco Mosaic Virus Damage (noticed the puckered leaves)“A” The last one I will cover today is Alternaria Leaf Spot also known as Early Blight. This is caused by various fungi in the Alternaria family. Lesions are round to irregular spots on older leaves. Spots enlarge and concentric rings in a bull's-eye pattern can be seen in the center of the diseased area. It is best to use a variety that has been bred to resist this disease, but if it is severe enough to warrant chemical control, select one of the following fungicides: maneb, mancozeb, chlorothalonil, or copper fungicides. Follow the directions on the label, this is the law!Alternaria Leaf Spot Damage
There are many other diseases that affect Tomatoes. This list is just some of the things that have been bred into them to help resist the problem. As you can see, finding one that has some resistance to a certain disease could be very useful.There are also many cultural practices that you should be following already. Things such as rotating crops. I know this is difficult if you have a small area to garden in. Ideally you will want to plant things that have no relation to what you planted the previous year. Avoid planting Tomatoes in the same place as well as Potatoes and Peppers. Corn or Beans would be a good alternate crop.Sanitation. This is a big one I have been harping on for a long time. Clean up any fallen leaves or fruit. Especially if you think you might have some kind of a disease problem. DO NOT compost. Destroy the debris completely or remove them from the area. Plant in a well drained area. Make sure there is ample sunlight. Do not plant too close together so they can have good air circulation. Common sense is one of your biggest tools in your arsenal.I hope this has cleared up much of the confusion when you open up a seed catalog. Once you know the lingo, it really is not hard to understand. As always, if you have any questions, please feel free to e-mail me. But for right now, I am going to take my leave of you, I think I just heard the mailman and he might have another catalog for me!Happy Growing!Darren
There are many other diseases that affect Tomatoes. This list is just some of the things that have been bred into them to help resist the problem. As you can see, finding one that has some resistance to a certain disease could be very useful.There are also many cultural practices that you should be following already. Things such as rotating crops. I know this is difficult if you have a small area to garden in. Ideally you will want to plant things that have no relation to what you planted the previous year. Avoid planting Tomatoes in the same place as well as Potatoes and Peppers. Corn or Beans would be a good alternate crop.Sanitation. This is a big one I have been harping on for a long time. Clean up any fallen leaves or fruit. Especially if you think you might have some kind of a disease problem. DO NOT compost. Destroy the debris completely or remove them from the area. Plant in a well drained area. Make sure there is ample sunlight. Do not plant too close together so they can have good air circulation. Common sense is one of your biggest tools in your arsenal.I hope this has cleared up much of the confusion when you open up a seed catalog. Once you know the lingo, it really is not hard to understand. As always, if you have any questions, please feel free to e-mail me. But for right now, I am going to take my leave of you, I think I just heard the mailman and he might have another catalog for me!Happy Growing!Darren