required for infection

Listing 1 - 10 from 138 for required for infection

Apple Powdery Mildew, HYG-3001-94
... between 50-77 degrees F. The optimum temperature range for the fungus is 66-72 degrees F. Although high relative humidity is required for infection, the spores will not germinate if immersed in water ... Most other varieties may also be infected if inoculum is present and conditions are favorable for infection. Plant trees in sunny locations with good air drainage. This reduces the humidity around ...
ohioline.osu.edu

Scab of Apple and Crabapple, HYG-3003-94
... is required for infection to occur, apple scab is most severe during years with frequent spring rains. Control The use of resistant or scab immune varieties is the ideal method for controlling ... . Some of the many crabapples with both excellent scab resistance and superior horticultural characteristics for Ohio include: Anne E, Bob White, Molten Lava, Ormiston Roy, Prairifire, Red Jewel, Sargent, ...
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Fruit Disease Focus - April, 1998 - Apple Scab
... of time required for infection to occur depends on the number of hours of continuous wetness and the temperature during the wet period (Table 1). Young leaves remain susceptible for five to eight days, but their lower surfaces may become infected in late summer. For fruit, the duration of the wet period required for infection increases with the age ...
www.caf.wvu.edu

Daylily Dictionary: Leaf Streak
... is caused by Aureobasidium microstictum, however an injury to the plant may be required for infection to take place - pest damage, for example. Symptoms include yellowing along the central leaf vein followed by browning ...
www.daylilies.org

Plant Pathology Fact Sheets -- Fruit Pathology
... twigs. Infection of pear foliage and fruit occurs under conditions similar to those required for infection of apple by the apple scab fungus. Ascospores are the major source of primary inoculum. Infection occurs ... required for infection depend on the number of hours of continuous wetness and the temperature during this wetting period. Scab lesions may develop in as few as 8 days after infection ...
www.ppath.cas.psu.edu

RHIZOMANIA
... host to reproduce. Both are host specific and the virus is dependant on the vector for infection. The natural host range, therefore, is limited by those species that P. betae is capable ... (i.e. –30 to 0 cb), infection by Polymyxa increases greatly. After planting and prior to seed germination, when soil temperatures are lower than required for infection, it is best to fill the soil ...
www.uidaho.edu

Potato Powdery Scab
... .3 bar) is required for infection. Soil moisture below this results in little infection. Low O2 also favors the disease. The tuber growth slows and the window of time for infection increases. Suberin appears to confer resistance. The more tubers mature, the more resistant they appear. Temperature Infection occurs around 11-15°C ( ...
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Grape Black Rot Infection Table
Grape Black Rot Infection Table Fruit IPM Grape Black Rot Approximate number of wetting hours required for foliar infection by grape black rot at different temperatures Temp F Hours of Wetness 50 24 55 12 60 9 65 8 70 7 75 7 80 6 85 9 90 12 Source R.A. Spotts, Ohio State University Data represent Concord, Catawba, Aurora and Baco Noir. Home Search Feedback News Last modified: November 11, 1997
www.canr.msu.edu

Pruning fruit trees for pest management
... of the control program required for canker type diseases, and complete removal is nearly impossible. But without any attempts at sanitation, it is an uphill and ineffective battle for the crop protectants. Sanitation ... severe freeze, the pruning cuts can be winter injured and will serve as sites of infection for many canker diseases such as black rot and Nectria twig blight. It is not rare ...
virtualorchard.net

Practical tips for the better pruning of apple trees
... and interception within the tree canopy to optimize tree chemistry for the production of fruit. Although a complete understanding of ... pruning should also be done during bloom to reduce cytosphora infection. Remove all dead, broken, or diseased branches, and all branches ... easy an effective way to accomplish this without the art required for most pruning. Prune heavier on on-crop years, lighter in ...
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