不同塑膜袋的防虫效果及对番石榴果实品质的影响

摘要

The effects of different material bags on preventing oviposition of Bactrocera dorsalis and B .correcta as well as on fruit quality of guava were studied.The results showed that both B .dorsalis and B .correcta can’t ovi-posit on the fruits bagged with PO (20 μm),PE (20 μm),PP (15 μm)or thicker bags.In a field test,the fruit flies also cannot infect the guava fruits bagged with PO (20 μm)or PE (20 μm).The quality of guava fruits bagged with 30μm PP is the same as the un-bagged control.The total soluble solids,titratable acid and sugar contents of fruits bagged with PO (20 μm),PO (25 μm),PE (20 μm)or PE (30 μm)were lower than the un-bagged control.%以不同材质和厚度的塑料薄膜为材料，研究果实套袋对橘小实蝇、番石榴实蝇的防虫效果，以及对番石榴品质的影响。室内套袋试验结果表明，当 PO、PE 厚度≥20μm、PP 厚度≥15μm 时，橘小实蝇、番石榴实蝇雌虫产卵管不能穿透塑料薄膜而产卵在果实上；田间套袋试验结果表明，PO （20μm）和 PE （20μm）套袋的果实均未检测到实蝇。套袋果实外观较未套袋果实好，30μm PP 套袋的番石榴果实品质与未套袋果实无显著差异，PO （20μm）、PO （25μm）、PE （20μm）和 PE （30μm）套袋的番石榴果实中可溶性固形物、可滴定酸、糖含量等较对照低。