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Old 21st August 2016, 09:47 AM
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Default Grey mold on tomatoes

Unfortunately I found that at this year I have got grey mold (Botrytis cinerea) to the tomatoes. To the leaves and stems come grey/brown spots, leaves slowly die and tomatoes get rotten spots and they too will die. Nothing can be done at this stage, only to pick away infected leaves and hope the best or harvest all tomatoes as fast as possible and again hope the best.

Gray mold

Botrytis cinerea, the disease known as gray mold, strikes a range of perennials and annuals as a distinctively velvety, gray growth. On tomatoes (Solanum lycopersicum), the disease starts on stems and leaves, eventually rotting the tomatoes themselves while they are at the green stage. Because there is no real cure for gray mold, remedies are aimed at preventing the disease in the first place, or halting its progress.


Selective Planting

One remedy for ongoing gray mold infestations is to segregate tomato seedlings that show obvious signs of already having the disease from healthy tomato seedlings. Afflicted seedlings will have dead leaves or wounds on the stems. Destroy these plants rather than setting them in the ground. Additionally, where you plant can be as crucial as what you plant. Because fungal spores overwinter in the soil, it's best to grow tomatoes in a new spot from year to year so that the previous years' infection doesn't spread as rapidly.


Aggressive Pruning

Pruning your tomato plant is an especially effective remedy when gray mold is the disease plaguing it. That's because gray mold settles into dying or dead plant tissue first. Catching the disease at this stage may help you rid your tomato plant of gray mold altogether. Use clean pruning shears to cut away stems or foliage that have gray mold on them. After pruning, disinfect the shears by wiping the blades with hydrogen peroxide or chlorine bleach.


Slowing Spread

To lower the risk of your tomato getting grey mold, follow the garden practices that keep fungal spores from spreading. Wet leaves are most susceptible to gray mold and other plant disease. Water the soil around tomato plants, rather than their foliage, by using drip irrigation -- or simply by aiming your garden hose at the soil rather than the plants. Spacing tomatoes so that their foliage doesn't touch also helps lessen fungal spread. Finally, pick up any infected plant parts that have fallen to the ground, and remove them promptly.


Not only tomatoes are in danger. Grey mold is common on apples, grapes, strawberries, blackberries, raspberries, gooseberries, beans, cucumber, courgettes, lettuce and tomatoes. It is also a problem for plants grown under glass, where conditions can be humid and overcrowded. It will infect Chrysanthemum, Cyclamen, Pelargonium, Primula and, in fact, most ornamental plants.

Last edited by saliha; 21st August 2016 at 09:57 AM.
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Old 21st August 2016, 09:55 AM
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Grey mold damages on the stems:





On the leaves:





Fruits:

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Old 21st August 2016, 04:23 PM
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youve done the right thing by getting rid of all the leaf matter that has been infected, keep an eye on them and just uproot the ones that are badly affected and burn them if you can ......
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Old 23rd August 2016, 06:23 PM
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I had to uproot almost all tomatoes as they were too badly infected already. Only two 100s&1000s are left. Seems they might have some more resistant against grey mold. A lot of yellow leaves but mostly they aren´t as bad infected - at the least not yet.

It felt sad to throw away so many big tomatoes but they had already rotten spots on them.

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Old 24th August 2016, 04:15 PM
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yeah it is sad but a necessary thing to do...
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