沙田柚低温杀虫处理试验研究

Study on cold treatment of pomelo fruit sinfested with oriental fruit fly .

对人工感染桔小实蝇(Bactroceradorsalis)的沙田柚开展低温除害处理研究。研究结果表明,在1.7℃±0.06℃和1.8℃±0.33℃的低温条件下,连续处理14天,可将感染在果实中71184头和46341头的桔小实蝇幼虫全部杀死;在0.96℃±0.25℃的低温条件下,连续处理13天,可将感染在果实中58866头桔小实蝇幼虫全部杀死。果实损伤测定试验结果表明,在1～2℃下连续贮藏14天,沙田柚果实无损害。

The cold treaunent of pomelo （ Citrus grandis ） fruits infested artificially with the 2nd and 3rd instar larvae of oriental fruit fly, Bactrocera （ Bactrocera ） dorsalis （Hendel） was studied. The results showed that a total of 71184 and 46541 larvae were killed completely at the pulp temperature of 1.7℃ ＋ 0.06℃ and 1.8℃ ＋0.33℃ for 14 consecutive days respectively. A total of 58866 larvae were killed completely at the pulp temperature of 0.96℃ ＋ 0.25℃ for 13 consecutive days. After the treatment, the quality of treated fruit showed no significant difference from that of the control.