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Pumo Cai,Jingfang Hong,Cong Wang,Yanchuan Yang,Chuandong Yi,Jiahua Chen,Qinge Ji 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.1
Co-60 radiation has been broadly used for pest management because it results in male sterility and a lack ofemergence of unparasitized hosts due to oxidative damage. Insect life is significantly affected by abiotic stressfactors, including Co-60 radiation. In the present study, we determined the influence of Co-60 radiation on animportant pest in southern China, the oriental fruit fly Bactrocera dorsalis (Diptera: Tephritidae). We exposed 30-h-old B. dorsalis eggs to Co-60 radiation at doses of (0, 5, 10, 15, 20, 25, 30, 35, and 40 Gy) and determined theactivity of the antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), and peroxidase (POX). CAT andPOX activity significantly increased in B. dorsalis in the 1st larvae instar after high-intensity radiation doses(25–40 Gy) and played an important role in the antioxidant response to intensive radiation. The activity of POXin B. dorsalis at the 2nd larval instar sharply decreased after different doses of radiation, except for 10 and 40 Gy. Our results demonstrated that Co-60 radiation affected the activity of antioxidant enzymes and disturbed thephysiology of B. dorsalis, especially at early stages (the 1st, 2nd larvae instar). These three antioxidant defenseenzymes cooperatively play an important role in protecting B. dorsalis from oxidative damage.
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Wang Bo,Huang Zongfang,Yang Deqing,Ji Qinge,Cai Pumo 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.3
In the present study, preservatives and antibiotics were applied in a variety of doses to assess their effects on the beer waste-based protein bait, a product widely used to control populations of Bactrocera dorsalis (Diptera: Tephritidae). Screening was performed using the inhibition zone method against the dominant bacteria in deteriorated protein bait. Additionally, the attractiveness of the bait was assessed after respectively adding different doses of methyl eugenol, brown sugar solution, ammonium acetate, and guava essence, as determined by bio-cage tests. The results showed that the four selected preservatives had different inhibition effects at different dose levels, and that the level of inhibition increased with dose: at the highest dose of 1:1 (v:v), sodium benzoate can significantly inhibit Staphylococcus spp., potassium sorbate can significantly inhibit Lactobacillus spp., sodium nitrite can significantly inhibit Escherichia spp. and ethyl p-hydroxybenzoate can significantly inhibit Staphylococcus spp. and Xanthomonas spp. Among three antibiotics, kanamycin was the most effective in suppressing a mix of all four bacteria for all tested doses. In terms of lure performance, the addition of four substances in various ratios into the protein bait were found to have varying effects on its attractiveness to B. dorsalis females and males. Specifically, the addition of a high-dose of guava essence could significantly enhance the attractiveness of the bait. Our findings will help to enhance the effectiveness of protein bait ap plications by prolonging the quality guarantee period and improving its attractiveness toward both female and male B. dorsalis.
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