Tomato anthracnose is also know by the scientific name Lycopersicon esculentum. It is most commonly spread by water hitting the ground and splashing the anthracnose fungus onto the plant leaves or fruit. The tomatoes can get tomato anthraconse by the fruit touching the ground. Unsupported plants are very susceptible to getting the anthraconse fungus.
A tomato with anthracnos should be removed from the garden area as soon as it is notice. The fungus spreads rapidly. A serious loss in fruit can develop if the fungus is not controlled.
The symptoms include spotting on the fruit, leaves, roots and stems. Young plants can be infected by the fungus and not show any symptoms until the fruit ripens. Susceptibility of fruit infection increases as the plant matures.
The roots of a tomato plant are normally only infected in the greenhouse setting. This is due to the above ground-irrigation and constant temperature between 50 and 80 degrees Fahrenheit. Plants infected in a greenhouse may show no signs until the fruit matures.
Discovering tomato anthracnose fungus can be done by examining the leaves and checking for small dark circles that are surrounded by a yellow ring prior to the fruit maturing. The fruit will have circular indentations. The indentations will eventually turn black and ruin the entire tomato. Roots on an infected plant will have brown leisons and will be very easy to pull from the ground.
Rotate the location for planting tomatoes yearly. Water the plants only if needed. Do not over water. Surround the tomato plants with mulch to help retain the moisture in the ground and off the tomatoes. Stake the plant to prevent the fruit from touching the ground. Keep the garden area weed free. Use certified disease free plants or seeds if possible. The disease free seeds should show that they have been treated with a fungicide.
Remove any infected leaves and fruit from the plant and the immediate area. Dispose of the infected items in a sealed bag or by burning. Do not place the infected fruit or plant in a compost pile.
Greenhouses need to use the above mentioned preventative methods plus the tomatoes should be planted in pathogen-free soil to prevent root damage. Do not use an irrigation or fertilization system that is a closed-recirculation unit.
Types of chemical control that can be used include Bravo Ultrex, Cabrio EG, Cuprofix, Ultra 40D, Echo 720, Heritage, Inspire, Man Kocide, Nu Cop 50 WP, Qudris Flowable, Quadris Opti, Revus Top, and Tanos
U Mass Amherst – Tomato Anthrocnose
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