?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Efficient+Multi-location+Testing+of+Scab+Resistant+Cultivars+for+Organic+Apple+Production+in+Switzerland&rft.creator=Weibel%2C+Franco&rft.creator=Schmid%2C+Andi&rft.creator=H%C3%83%C2%A4seli%2C+Andreas&rft.subject=Fruit+and+berries&rft.subject=Crop+health%2C+quality%2C+protection&rft.subject=+Breeding%2C+genetics+and+propagation&rft.description=The+market+and+production+of+organic+apples+is+growing+worldwide.+Most+of+the+production+occurs+on+freshly+converted+orchards+with+cultivars+very+sensitive+to+apple+scab+(Venturia+inaequalis)+that+in+humid+conditions+need+an+intensive+plant+protection+program.+For+the+future+development+of+organic+fruit+growing+towards+a+credibly+sustainable+production+it+is+necessary+to+replace+these+cultivars+with+scab+resistant+or+tolerant+cultivars.+Cultivar+testing+under+organic+growing+conditions+is+therefore+an+important+task.+We+describe+our+testing+concept+that+consists+of+precision+trials+where+cultivars+are+tested+with+an+without+aphid+control+and+with+and+without+crop+load+regulation.+In+parallel%2C+we+carry+out+on-farm+trials+with+the+most+promising+cultivars+on+up+to+10+commercial%2C+certified+organic+farms+in+all+apple+growing+regions+of+Switzerland.+Our+experience+with+the+concept+is+mostly+positive+because+recommendations+for+the+organic+growers+can+be+made+relatively+fast+and+reliably.+However+the+test+system+is+costly+and+labor+intensive.&rft.publisher=International+Society+for+Horticultural+Sience+(ISHS)&rft.contributor=Janick%2C+J.&rft.date=2003&rft.type=Book+chapter&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Forgprints.org%2F2801%2F1%2Fweibel-et-al-2003-acta-horticulturae-artikel.pdf&rft.identifier=Weibel%2C+Franco%3B+Schmid%2C+Andi+and+H%C3%83%C2%A4seli%2C+Andreas+(2003)+Efficient+Multi-location+Testing+of+Scab+Resistant+Cultivars+for+Organic+Apple+Production+in+Switzerland.+In%3A+Janick%2C+J.+(Ed.)+XXVI+International+Horticultural+Congress+%C3%A2%C2%80%C2%93+Genetics+and+Breeding+of+Tree+Fruits+and+Nuts%2C+International+Society+for+Horticultural+Sience+(ISHS)%2C+pp.+335-342.&rft.relation=http%3A%2F%2Forgprints.org%2F2801%2F