Wednesday, February 1, 2012

My tomato plants are getting some black spots on the leaves, is this disease? Will it kill the plant?

It might be Tomato Spotted Wilt Virus (TSWV). Plants that are infected with TSWV are stunted, may wilt, and often die. Initially, leaves in the terminal portion of the plant stop growing, become distorted, and turn pale green. In young leaves, veins thicken and turn purple, causing the leaves to appear bronze. Dark purplish-gray ring spots frequently occur on infected leaves. Stems of infected plants often have purplish brown streaks. Infected fruit may exhibit numerous ringspots and blotches and may become distorted if infected when immature.



TSWV is usually spread by thrips and aphids. Currently, there is no effective way to control TSWV. Controlling thrips and aphids to prevent and reduce spread of TSWV is the only strategy. Spray tomatoes with an insecticide, such as malathion, neem, or insecticidal soap, to suppress insect populations and spread of TSWV. At the first sign of TSWV, always remove and destroy all infected plants as soon as symptoms appear. Leaving an infected plant can serve as a new source for the disease and will only aid in the spread of it. Sacrificing one or a few may help save the others.



If you think that this can't be it, go to a lawn and garden store and buy tomato pesticide. It can be organic or chemical, but follow the directions and watch them to see if it improves.

My tomato plants are getting some black spots on the leaves, is this disease? Will it kill the plant?
Yes it is a disease and yes it can kill the plant.
Reply:OK, this early in the year too much water is probably the answer...but here in Southern Illinois, we get a lot of tomato blight. That is a fungus that is in the soil and gets on the leaves when water splashes on the leaves from rain or watering. I have only lost a couple plants to the blight in 10 years. Solution:



1: Mulch around the bottom of the tomato plants. I use either grass clippings, (make sure there has been no "weed and feed" put on the grass) or I get a few bales of hay and spread it around. This way you can also pick tomatoes after it has rained and not get mud all over your shoes.



2: I pick all the leaves and stems off my tomato plants up to 1 foot off the ground. This takes some time, but the water will not splash up on the leaves, and I will have good tomatoes all summer and fall until the first heavy frost.



srockey
Reply:Remove the lower infected leaves and toss them. Get yourself some fungicide and follow directions.
Reply:check out this link for your answer
Reply:those black spots are the result of mold spores and yes it will get tomatoe dust and apply liberally

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