#Botrytis blight fuchsia plus

OHP 6672 4.5 F at 10 to 14.5 fl oz/100 gal water plus another fungicide.

Use with oils or adjuvants may damage plant.

Medallion WDG at 2 to 4 oz/100 gal water.

Protect DF at 1 to 2 lb/100 gal water plus 2 to 4 oz spreader-sticker.

Fore 80 WP at 1.5 lb/100 gal water plus a spreader-sticker.

Mancozeb-based products can be used as mixing partners and provide some protection.

Use with oils or adjuvants may cause plant damage.

Decree 50 WDG at 0.75 to 1.5 lb/100 gal water.

Astun at 10 to 17 fl oz/100 gal water.

Limit the use of any one group during the growing season. Tank-mix and/or alternate products from different groups with different modes of action to prevent the buildup of resistant fungi. If using DROP or DIP for size control, do not let humidity rise above 90%.Ĭhemical control Best when used with cultural controls.

Maintain growing temperatures in low 60s for day and high 50s for night, which can be increased to the mid 60s (negative DIF) once plants are in hanging baskets.Allow to dry between irrigations especially during short days.Do not moisten the leaves when watering.Increase plant spacing for improved air circulation.Increase ventilation and air circulation, and keep plants dry.Remove and destroy infected tissues or fallen plant debris such as spent or aborted flowers.In humid conditions, a fuzzy fungal growth that is brown-to-gray appears around the infected tissues. Stems can develop dark cankered areas resulting in wilting of foliage above that point. Symptoms Infected leaves and flower parts develop a soft, brown decay. Growing fuchsias under conditions that are too warm can result in soft plants that cannot withstand shipping. This in turn can encourage more disease development as this fungus colonized these dead or weakened tissues. Severe water stress in the spring can cause fuchsia flower buds to abort and lower leaf yellowing or defoliation.

Under cool, humid conditions, and low light levels in greenhouses, the disease spreads rapidly.

Survives in plant debris, favored by high moisture and low temperatures. Use effective fungicides in rotation for optimum Botrytis management that will slow the development of resistance.Greenhouse Plants, Ornamental - Gray MoldĬause Botrytis cinerea, a fungus. 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. The common gray mold fungus, Botrytis cinerea, attacks a wide variety of ornamental plants, probably causing more losses than any other single pathogen.