Common Disease Problems
Damping Off: This is one of the most common problems when starting plants from seed. The seedling emerges and appears healthy; then it suddenly wilts and dies for no obvious reason. Damping off is caused by a fungus that is active when there is abundant moisture and soils and air temperatures are above 68 degrees F. Typically, this indicates that the soil is too wet or contains high amounts of nitrogen fertilizer. Burpee Recommends: Keep seedlings moist but do not overwater; avoid over-fertilizing your seedlings; thin out seedlings to avoid overcrowding; make sure the plants are getting good air circulation; if you plant in containers, thoroughly wash them in soapy water and rinse in a ten per cent bleach solution after use.
Downy Mildew: This fungus causes whitish grey patches on the undersides and eventually both sides of the leaves. Burpee Recommends: Rotate crops with plants in a different family. Avoid overhead watering. Provide adequate air circulation, do not overcrowd plants. Do not work around plants when they are wet.
Powdery Mildew: This fungus disease occurs on the top of the leaves in humid weather conditions. The leaves appear to have a whitish or greyish surface and may curl. Burpee Recommends: Avoid powdery mildew by providing good air circulation for the plants by good spacing and pruning. Contact your Cooperative Extension Service for fungicide recommendations.
Rust: A number of fungus diseases that cause rust colored spots on foliage and stems. Burpee Recommends: Practice crop rotation. Remove infected plants. Contact your Cooperative Extension Service for recommendations.
Sclerotinia: Also called white mold, this fungus looks like a spiderweb crawling on the surface of the growing medium. It can climb onto plants and kill them in time. Burpee Recommends: Decrease humidity and increase air circulation. Avoid overcrowding seedlings. Clean seed starting supplies thoroughly before reuse.
Common Pest and Cultural Problems
Aphids: Greenish, red, black or peach colored sucking insects that can spread disease as they feed on the undersides of leaves. They leave a sticky residue on foliage that attracts ants. Burpee Recommends: Introduce or attract natural predators into your garden such as lady beetles and wasps who feed on aphids. You can also wash them off with a strong spray, or use an insecticidal soap.
Deer: Plants may be eaten to the ground. Burpee Recommends: Try a deer repellent or physical barrier for young plants.
Groundhogs: Groundhogs can eat chervil to the ground. Burpee Recommends: Physical barriers work best. Contact your Cooperative Extension Service for recommendations.
Rabbits: Chew on plant leaves. Damage is similar to deer damage but not usually as extensive. Burpee Recommends: Use a hot pepper wax spray or rabbit repellent.
Slugs: These pests leave large holes in the foliage or eat leaves entirely. They leave a slime trail, feed at night and are mostly a problem in damp weather. Burpee Recommends: Hand pick, at night if possible. You can try attracting the slugs to traps either using cornmeal or beer. For a beer trap, dig a hole in the ground and place a large cup or bowl into the hole; use something that has steep sides so that the slugs can’t crawl back out when they’re finished. Fill the bowl about ¾ of the way full with beer, and let it sit overnight. In the morning, the bowl should be full of drowned slugs that can be dumped out for the birds to eat. For a cornmeal trap, put a tablespoon or two of cornmeal in a jar and put it on its side near the plants. Slugs are attracted to the scent but they cannot digest it and it will kill them. You can also try placing a barrier around your plants of diatomaceous earth or even coffee grounds. They cannot crawl over these.
Can I grow chervil as a houseplant? Yes, chervil works well indoors.
My chervil is blooming, is it still good to use? Cut flower stalks as they appear to continue your chervil harvest as the quality of the foliage will decline when the plants go to seed. You can allow the flowers to seed themselves at the end of the season, or cut them for dried bouquets.
Why should I grow chervil? Fresh chervil is difficult to find in stores and loses its flavor quickly after harvest. It’s also easy to grow on your own, and attractive in the garden.
Can I eat chervil flowers? Yes, they have a delicate anise flavor.
How can chervil be used as a companion plant? Chervil makes radishes hotter and crisper. It benefits lettuce and broccoli.