GARDEN GUIDE: Illnesses of camellias | Archives

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There are some crops with traits that assist present a supply of construction to the panorama. Not one thing with fluff, however one thing to anchor the design with power and sturdiness. The camellia is a kind of versatile crops that can be utilized all through the panorama as a backdrop or delivered to the forefront with their colourful flowers.

Camellias can be utilized as specimen crops, in borders, as basis plantings and used as screenings. They have wealthy, darkish foliage and blooms that bravely step ahead in cooler months whereas different crops are tucking themselves in for a winter’s nap. But even an anchor can present indicators of rust on occasion. As robust and dependable as they’re, camellias can nonetheless have points with some ailments. Many will be prevented or minimized by cultural practices. Here are the most typical.

Camellia dieback and canker is a severe fungal illness that causes the leaves to all of the sudden flip yellow and wilt. Cankers (sunken areas) develop on the bark and stems, ultimately girdle the stem and trigger areas above the canker to wilt and die. These signs often happen throughout sizzling, dry climate. Remove affected twigs under the cankered areas and disinfect pruning instruments between cuts to forestall unfold of the illness. Use of fungicides could assist shield pruned areas and leaf scars from additional an infection.

Camellia flower blight impacts solely the flowers inflicting them to show brown. Small irregular spots start on the petals, then enlarge and canopy virtually the whole flower. The flower often browns and drops from the plant inside 48 hours. Suspect this illness if the brown space spreads quickly from the outer edges to the middle of the bloom. Good sanitation is vital right here. Pull and destroy contaminated flowers and take away all fallen particles from across the plant. This fungus can survive within the soil and its spores will be wind-borne to different camellias within the panorama.

Root rot causes leaf yellowing, poor progress and wilting of the whole plant. The contaminated root system turns brownish in colour and dying could also be speedy or the plant could also be in decline for a number of years. This fungal illness thrives in areas with poor drainage and as soon as the plant turns into contaminated, it’s tough to regulate. Camellia japonica cultivars are extra prone. Use amendments to enhance soil drainage or plant in raised beds. If there was a problem with root rot prior to now, choose sorts of Camellia sasanqua or cultivars of Camellia japonica grafted onto sasanqua rootstock.

Leaf gall is extra widespread on Camellia sasanqua and is most evident throughout spring progress in moist, humid situations. Shoots and leaves grow to be enlarged and fleshy and irregular wanting. The affected areas grow to be almost white and the galls rupture on the undersides of leaves which ultimately flip brown. Remove galls earlier than they’ve an opportunity to rupture and rake and take away any fallen particles.

Yellow camellia mottle virus is transmitted by root grafts from diseased inventory. Irregular yellow, splotchy patterns seem on leaves and irregular white patches can seem on flowers. Choose wholesome crops from a good backyard middle to be sure to are getting ones which might be virus-free.

Algal leaf spot is a pathogen favored by moist climate. It causes round or blotchy spots on leaves. Spots could range and tackle a velvety look in summer time when reproducing spores. Premature yellowing of leaves could happen. Remove and destroy contaminated leaves and enhance air circulation across the plant.

Most ailments of camellias will be prevented by selecting wholesome crops, correct website choice and good rising situations with safety from afternoon solar. Provide good drainage and conduct a soil pattern now and again to ensure your crops have all of the vitamins they want. If using fungicides ought to grow to be needed, contact your native extension workplace for suggestions or go to hgic.clemson.edu/factsheet/camellia-diseases-insects-pests/ for extra info. Camellias are properly tailored to our southern local weather and will be lengthy lived. They can present curiosity within the winter backyard and entice pollinators and tune birds. Although not proof against some plant ailments, they continue to be a steadfast addition to the panorama, tried and true.

Gail Griffin is an Extension Master Gardener Volunteer with North Carolina Cooperative Extension in Lee County.

Gail Griffin is an Extension Master Gardener Volunteer with North Carolina Cooperative Extension in Lee County.

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