夾竹桃紅顏料(Phloxine B)對東方果實蠅(Bactrocera dorsalis)之毒效評估
Other Title
Evaluation on the toxic effects of phloxine B to the Oriental fruit fly (Diptera: Tephritidae)
Journal
植物保護學會會刊
Journal Volume
47
Journal Issue
1
Pages
69-76
Date Issued
2005-03
Date
2005-03
Author(s)
Abstract
Tests were conducted to determine the toxic effects of phloxine B (a xanthene dye) to the Oriental fruit fly, Bactrocera dorsalis (Hendel). Dye-containing diets were made of 25 % yeast autolysate, 75 % sugar, and various concentrations of phloxine B (0.125 %, 0.25 %, 0.5 %, 1 %, 2 %, and 4 %). The tested adult flies were starved for 12 h prior to the experiment, and then allowed to feed on various diets for 4 h in the dark. After 4 h of feeding, these flies were separated into 3 groups with each group consisting of flies from all of the various groups fed different concentrations of dye. The 3 groups were then kept under the following conditions, respectively: (1) light first at an intensity of 8000 lux for 8 h, then dark, followed by a 12: 12 (L: D) h photoperiod throughout the remainder of the 72-h experimental period and fed a non-phloxine B diet; (2) complete darkness throughout the 72-h period and fed a non-phloxine B diet; (3) totally dark for 7 d with a phloxine B-containing diet. The results showed that in dye-fed flies kept under condition (1), 100 % mortality was observed after 1 h of exposure to the light in both sexes of flies fed previously with 4 % phloxine B. For the dye-fed flies kept completely in the dark and fed the non-dye food, no mortality occurred within 72 h. However, if the flies were kept completely in the dark but were fed the phloxine B diet, 100 % mortality occurred in the flies which had fed on 4 % phloxine B. These results indicate that phloxine B elicits light-independent toxicity in Oriental fruit flies; however, the light may have facilitated its toxic effects. In addition, female flies fed the dye laid fewer eggs. Our study suggests that phloxine B has the potential to be used as an environmentally friendly control agent for Oriental fruit flies, and further investigations should be carried out.
Subjects
果實蠅
毒性
生殖力
毒餌
害蟲防治
fruit flies
toxicity
fecundity
poisoned bait
pest control
Publisher
中華植物保護學會
Type
journal article
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