Green Works gives useful tips to peony growers and breeders to achieve a successful crop. In their newsletter, they advice growers how to prevent and combat several diseases and viruses. And one of the diseases that is being discussed is Botrytis.
Botrytis Control
Botrytis in flower buds is the same Botrytis causing flower buds to fall over. Falling over of flower buds in peonies is an important disease every year. Although Botrytis is spreading fast during wet and warm weather, most problems are caused during cold and wet weather, just before the flowering time. The flowers will not mature and are in a vulnerable stage too long. In this stage the mould will grow from the small leaf under the flower into the flower bud. When the weather turns warm and humid, the flower buds will fall over just before flowering time.
By spraying preventively the development of flower bud Botrytis can be stopped. Teldor Switch and Collis are strong products for the flowering, and this year Luna Privilege and Signum have also been admitted. Use a fluid to make sure the product is applied well around the flower bud.
Click here to learn more about combating common swift moth, controlling weed , serving fertilizers after flowering, preventing nematodes and viruses.

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