Between 2010 and 2012 , unusual disease symptom occurred in Michigan celery making the crop unmarketable . symptom include cupped leaves ; twist stalks with retentive , slender , brown lesion ; and the development of adventitious ascendant , but the lawsuit remained unknown . Research let go from Michigan State University now shew that these symptom can be attributed to anthracnose fungus , get it on to infectpeppers , tomatoesand spinach , among other veg , according to the Michigan State University Extension .
cultivated celery anthracnose is make by the fungusColletotrichum acutatum , which was first report as a pathogen on celery in Australia during the 1980s and was first detected in Michigan in 2010 . The common name of this disease , “ anthracnose , ” is shared with diseases of onions , love apple and cucurbit , but anthracnose in these crop consult to diseases due to other types of fungi .
cultivated celery anthracnose bears resemblance to another disease scream aster yellowness , which can also cause plant distortion and curling leaves . However , leaf of plants affected by aster yellow turns yellow , while foliage of anthracnose - infect plant remains green .
Recent studies in MSU ’s Hausbeck Lab — funded by Project GREEEN , Michigan ’s plant - factory farm initiative — show that spread of Apium graveolens dulce anthracnose occurs at temperatures as low as 59 level F , but increases in periods with ardent weather or stretch out leaf wetness , with spore spreading via rain splash . The researcher tested Greenbay , Sabroso and Dutchess cultivated celery diversity for disease resistance , but all were susceptible when challenge with the anthracnose pathogen , do disease bar key .
To control the paste of celery anthracnose , farmers growing in greenhouses can disinfect flats prior to re - use , or use new flat each class . This sanitation practice is a mainstay of any standard disease program and is important for both foliar blights and root bunk . spotter celery seedlings at least double each week and calculate for disease symptoms . limitation periods of humidity in the greenhouse with a ventilation organization and by water seedling at a time of sidereal day that will allow them to dry quick .
In the field , during the growing time of year , use practices that limit the spread of celery anthracnose . Irrigate at a time of day that will admit farewell to dry out rapidly . As you start field operations , workplace fields with a story of disease after you finish study in location with no history of the disease . Whenever possible , invalidate workings field when farewell are wet ( e.g. , after fog , dew , irrigation or rain ) . Working landing field when the foliation is wet , could circulate the pathogen from one locating to another within a field . If possible , king - wash your equipment with a easy lay - and - water solution after working each location to absent dirt and plant rubble that could have a bun in the oven the disease - causing spore between field . ( take down that chlorine disinfectants can eat sword equipment . )
