primary infections

Listing 1 - 10 from 62 for primary infections

Apple Powdery Mildew, HYG-3001-94
... primary infections. The powdery white appearance on infected shoots consists of many thousands of spores which are responsible for spreading the fungus and causing secondary infections later in the growing season. Secondary infections are important because they produce the overwintering infected buds. Secondary infections ...
ohioline.osu.edu

Grape Black Rot, HYG-3004-94
... and can travel considerable distances. Research has shown that ascospores are an important source of primary infections in the spring. Control Sanitation is important. Destroy mummies, remove diseased tendrils from the wires ...
ohioline.osu.edu More from this site

Fruit Pathology - Powdery Mildew
... emerge with primary infection. Inspect ten shoots per tree and record the number that are infected. From prebloom through fruit set, on larger bearing trees, count the number of emerging primary infections on shoots (photo 2-1) and blossom clusters (photo 2-4) on ten trees per five acres (2 ha). A total of one to ten and greater than ten primary infections ...
www.caf.wvu.edu

FD03 - FIRE BLIGHT OF APPLE AND PEAR
... means of entrance. From these primary infections, the bacteria may be carried to other blossoms, twigs or fruits resulting in secondary infections. These secondary infections may continue throughout the growing ... . Control of insects can reduce spread of the bacteria and the occurrence of infections. During bloom, bees can carry fire blight bacteria during pollination. Insecticides should not ...
www.ces.ncsu.edu

SCLEROTINIA STEM ROT OF TOMATOES IN GREENHOUSES
... (Figure 1). The apothecia produce enormous numbers of spores that are blown about and cause primary infections. They are the only infective spores in the disease cycle. Once the fungus is established ... rate of one 3.5 oz can per 1000 sq ft should help reduce new infections. Follow the recommendations on the label of the container. Solarization: After sanitizing the greenhouse in ...
www.ces.ncsu.edu More from this site

Fire Blight of Ornamentals
... color. Dark streaking in the wood often extends several inches beyond any surface discoloration. Secondary infections start in the small twigs, progress down the stem, and may eventually involve whole ... (75°-84°F). They are disseminated by wind-blown rain, certain insects, and pruning tools. Primary infections usually occur through the flowers at bloom, but bacteria quickly spread to twigs and ...
www.ext.vt.edu

... infections. The fungus may infect and colonize the leaves, fruit, petioles, and blossoms of the tree, with symptoms commonly observed on the leaves and fruit. Later in the spring, these primary infections produce secondary spores which infect other leaves and fruit. These secondary infections may continue throughout the growing season during wet ...
www.extension.umn.edu

... fungus produces spores that are windblown or rain-splashed to healthy tomato leaves, causing primary infections. Symptoms usually begin to appear on the lower leaves after fruit set. Initially round ... of spores that survive winter and the number of secondary infections. Reducing the number of spores that cause primary infections can be accomplished through cultural practices such as sanitation, ...
www.extension.umn.edu More from this site

Plant Pathology Glossary
... or asexual fruiting bodies. Secondary Inoculum inoculum produced by infections that took place during the same growing season. Compare with primary inoculum. Secondary Metabolite a compound that is not ... Systemic fungicide: a chemical agent that spreads internally through the plant and eradicates established fungal infections. See fungicide. top T Tillage the process of turning or mixing the soil. ...
bugs.bio.usyd.edu.au

Ammonia
... product from fish. It is excreted across the gill membranes and in the urine. The primary source of ammonia in aquaculture systems is fish feed. When feed is eaten by fish ... damage. Fish exposed to low levels of ammonia over time are more susceptible to bacterial infections, have poor growth and will not tolerate routine handling as well as they should. Ammonia ...
edis.ifas.ufl.edu

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