Unfortunately, the popular culinary herb rosemary is quite susceptible to various diseases caused by fungi. These are usually favored by excessive moisture.

Garden hygiene is important

Diseases in humans and animals as well as in the garden are kept in check by good hygiene and care tailored to the plants. Eliminate possible sources of infection by thoroughly disinfecting pots, planters and other gardening equipment at the end of each gardening year. Carefully remove rotting, diseased or dead plant parts and never dispose of them in the compost. These leaves and branches can carry fungal spores that would reinfect the plants the following spring.

Powdery mildew is common on rosemary

Rosemary is often attacked primarily by powdery mildew. This plant disease attacks stressed plants, especially those that are too crowded and have dry roots. If possible, do not put the plants too close together and make sure that your rosemary always has enough water. Remove affected areas promptly to stop spread.

Gray mold on rosemary

Gray mold, or botrytis, is another fungal disease that thrives in cool, damp conditions. It mainly affects leaves and stems. Poorly ventilated environments such as the inside of insufficiently ventilated greenhouses or shelters encourage these conditions, as does planting too densely. Improve air circulation and establish dry conditions to avoid or stop the problem. Remove all affected plant parts.

Rust fungi promote needle shedding

Rust fungi are a group of fungal diseases that discolor leaves and promote premature leaf drop. The fungi thrive in similar conditions to powdery mildew, that is, in damp and crowded places. Ensure good ventilation and plant the rosemary at the right distance. Clean the affected areas.

Wilting and rotting of rosemary

Organisms living in the soil can cause wilt. With good plant hygiene and care, wilt, which usually afflicts particularly weak and generally unhealthy plants, can be avoided. Wilting becomes especially dangerous for new rosemary seedlings.

tips and tricks

You should not use chemical pesticides such as fungicides to treat a rosemary bush infested with fungi, as you may no longer process the herb afterwards due to the risk of poisoning. If possible, switch to organic products.

IJA

Category:

Vegetable garden