Geranium botrytis blight12/30/2023 But often you’ll just need to prune away infected leaves, stems or blossoms. This includes removing the whole plant, if needed. Remove diseased tissue as soon as you see any signs of botrytis blight. Think of it as social distancing in your garden, a concept we are all now familiar with. Providing that extra space between plants also makes it a little harder for the pathogen to spread. You will also want to ensure that you allow room for air circulation around your plants, so they can dry off quickly after rain. Avoiding excess watering and watering at the roots minimizes the access to water that the pathogen needs to reproduce, germinate and spread. Water and fertilize plants only as needed. Too much water or too much fertilizer can actually encourage botrytis blight. The best way to minimize the risk of botrytis blight and manage an outbreak is through cultural practices. You may also see tiny black resting structures called sclerotia, but not all species of botrytis create them. You’ll want to examine any brown or spotted plant material and look for masses of silver-gray spores on affected tissue. This also provides the opportunity to look for signs of disease. cinerea can also infect asparagus, beans, beets, carrots, crucifers, cucurbits, grapes, lettuce, onions and other alliums, peppers, potatoes, raspberries, tomatoes and many others.įortunately, most of us who take the time to plant a garden like to visit it frequently - even daily - to stop and enjoy its wonders. Marigolds, zinnias, roses anemone, begonia, calendula, chrysanthemum, dahlia, geranium, hydrangeas, sunflower and zinnia are among the flowering plants often affected. ![]() So start with healthy plants and increase plant vigor to avoid this creeping gray velvet blight. cinerea is a weak opportunistic pathogen that mostly attacks stressed or weakened plants. It can infect a plant’s leaves, stems, flowers, seeds, seedlings or bulb - virtually the whole plant except its roots. All it takes is a few days of cool rainy spring or summer weather, typically between 59 and 77 degrees F, to activate spores of the pathogen that overwintered on dead plant tissue left in the garden from fall. Botrytis cinerea, commonly called botrytis blight, is a fungal disease that infects a wide range of ornamentals plants in our gardens as well as fruit and vegetables. Along with May flowers, April showers can also bring enough moisture and warmth to trigger the first signs of a gray mold that infects many of our herbaceous annual and perennial plants.
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