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- Title
梨火疫病防治用药对意大利蜜蜂的急性毒性与风险评价.
- Authors
班学; 马翔宇; 张飞鹏; 张王斌
- Abstract
In order to clarify the ecological risk of pesticides against pear fire blight on Italian honeybees (Apis mellifera ligustica), the acute toxicity of seven pesticides was determined indoors through continuous intaking and dripping experiments under the guidance of national standard GB/T 31270.10—2014 “Test guidelines on environmental safety assessment for chemical pesticides part 10: honeybee acute toxicity test”. The risk assessment was carried out according to the introduced hazard quotients (HQ). The results of the acute toxicity test showed that, the 48 h median lethal concentration (LC50, recorded by active ingredients, the same as below) and median lethal dose (LD50, recorded by single bee and active ingredients) of 45% zhongshengmycin TC (technical material), 85% kasugamycin TC and 4% kasugamycin AS (aqueous solution) were 208, 253, 247 mg·L-1 and 412, 2 434, 223 μg, respectively, which indicated low toxicity. The 48 h LC50 and LD50 of 0.3% ehydroxide AS were 45 mg·L-1 and 2.86 μg, respectively, which indicated moderate toxicity. In the acute oral toxicity test, the 48 h LC50 of 3% zhongshengmycin SL (soluble concentrate), 3% benziothiazolinone ME (microemulsion) and 47% kasugamycin copper oxychloride WP (water powder) was 110, 65, 107 mg·L-1, which indicated moderate toxicity; while in the acute contact toxicy test, the 48 h LD50 of these pesticides was 193, 22, 480 μg, respectively, which indicated low toxicity. The HQ of 3% benziothiazolinone ME and 0.3% ehydroxide AS was 75.0 and 340.9, respectively, which indicated moderate risk, while the HQ of 3% zhongshengmycin SL, 4% kasugamycin AS and 47% kasugamycin copper oxychloride WP was 8.5, 5.3 and 3.1, respectively, which indicated low risk. Therefore, in the production of Korla pear, zhongshengmycin, kasugamycin and kasugamycin copper oxychloride were preferred to control pear fire blight. For application of ehydroxide and benziothiazolinone, relevant measures should be taken to reduce the risk of toxicity upon honeybees.
- Publication
Acta Agriculturae Zhejiangensis, 2023, Vol 35, Issue 9, p2160
- ISSN
1004-1524
- Publication type
Article
- DOI
10.3969/j.issn.1004-1524.20221158