?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Ultraviolet+blocking+greenhouse+polythene+covers+for+insect+pest+control+on+organic+crops%3A+May+2003+-+September+2004&rft.creator=Morris%2C+Leigh&rft.subject=Crop+health%2C+quality%2C+protection&rft.description=This+report+reviews+the+development+work+carried+out+within+the+%C3%A2%C2%80%C2%98UV+Blocking+Polythene+Trial%C3%A2%C2%80%C2%99+on+the+organic+farm+at+the+Welsh+College+of+Horticulture+during+the+period+May+2003+to+September+2004.+Two+tunnels+were+erected+in+2003%2C+one+covered+in+UV+blocking+%C3%A2%C2%80%C2%98Sterilite%C3%A2%C2%80%C2%99+film+and+the+other+in+the+non-UV+blocking+%C3%A2%C2%80%C2%98Super+Strength+600%C3%A2%C2%80%C2%99.+The+salad%2Fbrassicas+crops+grown+during+the+first+season+under+the+UV+blocking+film+showed+significantly+less+pest+attack+(both+winged+and+non-winged+pests).+Less+aphids+were+present+and+their+%C3%A2%C2%80%C2%98flight+behaviour%C3%A2%C2%80%C2%99+was+greatly+reduced+under+the+UV+blocking+film.+The+crops+under+the+UV+blocking+film+also+appeared+to+establish+quicker+and+reached+a+greater+final+size.+Two+more+tunnels+were+erected+in+spring+2004+and+covered+in+identical+films.+All+four+tunnels+were+then+cropped+with+tomatoes%2C+peppers+and+cucumbers.+The+level+of+pests+in+all+crops%2Ftunnels+was+generally+very+low+during+the+season+and+there+was+no+apparent+significant+difference+in+pests+under+the+two+different+films.+Blue+and+yellow+sticky+traps+caught+noticeably+more+insects+under+the+non-UV+blocking+film+and+this+highlighted+either+a+greater+population+level%2C+and%2For+an+increased+level+of+flight+activity+under+that+film.+The+report+draws+conclusions+from+the+trials+and+makes+recommendations+for+the+2005+research.&rft.date=2004-10&rft.type=Report&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Forgprints.org%2F10859%2F1%2FUVBlockingpolytunnels.pdf&rft.identifier=Morris%2C+Leigh+(2004)+Ultraviolet+blocking+greenhouse+polythene+covers+for+insect+pest+control+on+organic+crops%3A+May+2003+-+September+2004.&rft.relation=http%3A%2F%2Forgprints.org%2F10859%2F