16 September 2007

Plant Nemesis; or, Searching for Why My Tomatoes Aren't Doing So Well

Along with those black, scabby tomatoes you sent me, you have done an excellent job describing the plant nemesis called Tomato Spotted Wilt Virus...Infected tomato plants have many small, dark, circular spots on younger leaves. Leaves may have a bronzed appearance and later turn dark brown and withered. Flushes of new growth are yellowish and distorted. Fruit has many spots about one-half inch in diameter with concentric, circular markings.

On ripe fruit these markings are alternate bands of red and yellow.

Pepper fruits may have dead spots as well.

Insects named thrips are the culprits that spreads the virus. Insects feed on a plant with virus and transmit it to another plant. Not all insects spread virus.


Thrips! Aaugh!

from http://plantanswers.tamu.edu/vegetables/tomato.html

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