![]() ![]() Tip: The fungus has shown to develop resistance to fungicides hence alternation is advisable practice. Spray with Iprode, Chariot, Nature gold, Sporeguard, Megaprode Lock, Pilote and dipping in Botristop, Botriguard, Fastruno, Biosure.Remove rotten berries immediately to prevent the spread of the fungus. Botrytis blight, also known as gray mold, is a problem in strawberries. Mechanical control of multiflora rose is difficult because all roots must be removed. Proper hygiene by removing the plant debris within then beds and sanitizing the harvesting tools Multiflora rose is a bush which can form large thickets in pastures and fencerows.Maintain proper aeration within the plants to prevent fungal development.Ensure the plant canopies are dry to prevent the development of the fungus.INSIGHT: The fungus stay in plant debris or soil when the conditions are unfavorable and attacks the plant when favorable conditions prevail. Under severe attacks stems may be attacked and results in complete plant dieback.This speck occurs due to reaction of the flower to the fungal attack. Red/pink spotted flower petals tips and edges are the initial stages of the attack. ![]() This disease vastly affects the flower vase life as it results to total decay of the flowers in vase. The disease starts in the farm and may continue to develop while the flower is under storage or transportation. The disease is promoted by high humidity conditions hence most common during the cool and wet weather and in the high altitude growing areas. In the European Market which is the major destination for Kenyan Flowers head botrytis is regarded as one of the major destructive diseases. Botrytis mostly affects the rose blooms and rarely leaves. Use effective fungicides in rotation for optimum Botrytis management that will slow the development of resistance.This is disease is caused by several strains of botrytis cinerea which is a parasitic or saprophytic organism hence relies on a susceptible host for food. The fungus is commonly resistant to thiophanate-methyl (3336, 6672 and Fungo) and is often partially resistant to dicarboximides (Chipco 26019, Vorlan). Fungicide resistance is reported for Botrytis. Chemical Controlįungicides may be required under some greenhouse conditions, especially with highly susceptible crops such as exacum, geranium, poinsettia, and fuchsia. All old blossoms and dead leaves should be removed, and all fallen leaves and plant debris on or under the benches should be gathered and burned. Because the fungus readily attacks old or dead tissues and produces tremendous quantities of airborne spores, the importance of strict sanitation cannot be overemphasized. ![]() Bioenvironmental Controlīecause high humidity is required for spore production and actual condensation is necessary for spore germination and infection, Botrytis can usually be controlled under glass by avoiding splashing and by heating and ventilating to prevent any condensation on the plant surfaces. Petals shed from crops in hanging baskets may encourage Botrytis leaf infections on the crops listed below. Active, healthy tissues, other than petals, are seldom invaded. Only tender tissues (seedlings, petals), weakened tissues (stubs left in taking cuttings, tissues infected by powdery mildew), injured tissues (bases of cuttings), or old and dead tissues are attacked on most crops. ![]() The spores will not germinate and produce new infections, however, except when in contact with water, whether from splashing, condensation, or exudation. Spores of Botrytis are produced on distinctive dark-colored, hairlike sporophores and are readily dislodged and carried by air currents to new plant surfaces. The fungus is usually identified by the development of fuzzy grayish spore masses over the surface of the rotted tissues, although such sporulation will not develop under dry conditions. As a result of Botrytis infection, very small seedlings can be rotted stems of poinsettia, snapdragon, zinnia, exacum, or lisianthus can be girdled and petal tissues of many plants, including carnations, chrysanthemums, roses, azaleas, and geraniums, can be spotted and ruined. It commonly attacks the stems of geranium stock plants and wounds on cuttings. The fungus causes a brown rotting and blighting of affected tissues. In this section, find information on plant disease identification and control, including rot, freeze damage, rust, blight, mold, scales. Preventing and controlling plant diseases is key to growing healthy plants. The common gray mold fungus, Botrytis cinerea, attacks a wide variety of ornamental plants, probably causing more losses than any other single pathogen. Plant Disease Identification and Control. ![]()
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