ECONOMIC INJURY LEVEL AND IMPACT OF WESTERN FLOWER THRIPS ON PLANT PRODUCTIVITY OF GREENHOUSE SWEET PEPPER
作者单位：Agriculture and Agri-Food CanadaResearch CentreHarrowOntarioCanada N0R 1G0 Agriculture and Agri-Food CanadaCentral Experimental FarmOttawaOntarioCanada K1A 0C6
会议名称：《9th Full Meeting of the Working Group“Integrated Control in Glasshouses”》
会议日期：1996年
学科分类：09[农学] 0904[农学-植物保护] 090401[农学-植物病理学] 090402[农学-农业昆虫与害虫防治]
摘 要：正The economic injury level for thrips-damaged fruit and the impact that different densities of western flower thrips have on individual plant productivity was determined for greenhouse sweet *** study was conducted from November to August,1993-95 in three greenhouses at the Harrow Research Centre using the cultivar ’Cubico’.Population densities of thrips were monitored weekly using yellow sticky traps and plant *** fruit were harvested weekly,graded,weighed and assessed for thrips *** and developing fruit counts, plant height and photosynthetic rate were used to measure plant productivity.A mean density of 15-20 adult thrips per sticky trap per day or 8 adult thrips per plant tapping would result in the occurrence of unmarketable *** density did not cause a reduction in fruit *** plant productivity was affected only under high thrips densities.