Prevention and treatment of Impatiens Ring Disease
The disease occurs on the symptomatic lobe. Produce large round spots with dark brown periphery. There are obvious concentric wheel lines on the surface of the lesion. In the later stage, the middle part of the lesion turned grayish brown and scattered with small black spots.
AscochytaphaseolorumSaccardo, a half-known pathogen.
In the route of transmission, the pathogens overwintered and oversummer on the diseased remains by conidia and ascomycetes. Conidia can be transmitted by wind and rain. Later, conidia were produced on the disease spot and continued to spread, causing re-infection.
Prevention and treatment methods perennial seriously ill areas, in the initial stage of the disease began to spray, every 7-10 days, spray 2-3 times. The commonly used agents are: 50% thiram wettable powder 800x liquid, 65% Dysen zinc wettable powder or 75% chlorothalonil wettable powder 600x liquid, 50% carbendazim wettable powder 1000 times liquid, and so on.
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Impatiens green petal disease
Also known as henna green disease, Jiangsu, Anhui, Hebei, Beijing and other places sporadic distribution. It mainly harms the flower apparatus of impatiens, making it lose its normal ornamental value. Symptom-affected plants are mainly characterized by the change of flowers to leaves, that is, petals change from normal pink to green, slender like leaves; some petals become leaf-like, leaving only a small amount of red. The new plant showed symptoms after flowering in that year. In the high temperature season in summer, the flowering period is shorter than normal, and the petals in the inner layer of Corolla turn brown, die and fall off quickly. Under the same cultivation and management conditions, the diseased plants are shorter than the healthy ones, and the leaves are often curled up from the edge.
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Introduction to the varieties of Impatiens
1. The head impatiens are also known as the head impatiens. Is a variety of impatiens. Flowers terminal. Main stem or branch apical. Large flowers, double. Branches expand and form clumps. two。 Dwarf impatiens is a variety of impatiens. The plant is short, with a height of 20-30 cm. 3. Dragon claw impatiens is a variety of impatiens. The lateral branches meander and extend horizontally. 4. Ho's impatiens are also known as Glass Cui. It is a common species of the same genus. Perennial herbs, mostly cultivated in 2012. The plant height is 20-30 cm. The stem is translucent. Fleshy, stout, much branched. Leaves ovate
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