| 摘要: |
| 2013—2015年，对韶关市曲江区小坑林场和乐昌市龙山林场的杉木（Cunninghamia lanceolata）种子园果实害虫进行了调查，初步查明，对杉木球果危害较大的害虫主要有杉木球果织蛾（Macrobathra flavidus）、杉木球果麦蛾（Dichomeris bimaculatus）、球果螟（Dirryctria sp.）、小绿叶蝉（Jacobiasca formosana）、乌毛盲蝽（Cheilocapsus sp.），其中小绿叶蝉和乌毛盲蝽为首次危害杉木球果记录。球果受害率在3—10月呈递增趋势，龙山林场球果9月、10月受害率分别为38.6%和37.4%，小坑林场分别为32.1%和35.7%。5%氯虫苯甲酰胺SC、40%氯虫·噻虫嗪AS、22%噻虫·高氯氟SC、8 000 IU/mL苏云金杆菌SC、25%灭幼脲III号SC第2次药后15 d的防治效果均达到60%以上，均为防治杉木球果害虫的有效药剂，以氯虫苯甲酰胺94.9%的总体防效最好，建议在生产中交替使用这5种杀虫剂。
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| 关键词: 杉木种子园,果实害虫,杀虫剂,防效 |
| DOI： |
| 分类号:S763.7 |
| 基金项目:广东省科技计划项目“杉木种子园果实害虫防控技术研究”(2013B020309008) |
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| Study on Occurrence and Control of Main Pests of Seed in Chinese Fir Seed Orchard |
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LIAO Fang-yan,ZHAO Dan-yang,QIN Chang-sheng,XU Jin-zhu and JIE Yu-ze
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Guangdong Provincial Key Laboratory of Bio-control for the Forest Disease and Pest,Guangdong Academy of Forestry,Guangzhou,Guangdong Provincial Key Laboratory of Bio-control for the Forest Disease and Pest,Guangdong Academy of Forestry,Guangzhou,Guangdong Provincial Key Laboratory of Bio-control for the Forest Disease and Pest,Guangdong Academy of Forestry,Guangzhou,Guangdong Provincial Key Laboratory of Bio-control for the Forest Disease and Pest,Guangdong Academy of Forestry,Guangzhou
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| Abstract: |
| An investigation on the pests of seed in Chinese fir seed orchards were made at Xiaokeng Forest Farm and Longshan Forest Farm of Shaoguan City from 2013 to 2015. The results showed that 5 species were the main pests damaging the seeds, eg. Macrobathra flavidus, Dichomeris bimaculatus, Dirryctria sp., Jacobiasca formosana, Cheilocapsus sp., among which, the last two pests are first recorded to damage Chinese fir seed. From March to October, the damage of the seeds were more and more serious, In September and October, the damage were most serious, the rate of the seed damage was 38.6% and 37.4%, respectively in Longshan Forest Farm, 32.1% and 35.7%, respectively in Xiaokeng Forest Farm. The control efficacy of five insecticides against seed pests were also tested. The results showed that the seed pests were managed effectively by all insecticides, eg. 5% Chlorantraniliprole SC, 40% Chlorantraniliprole· Thiamethoxam AS，22% Thiamethoxam·lambda-cyhalothrin SC, 8 000 IU/mL Bacillus thuringiensis SC and 25% chlorbenzuron III SC, the control efficacy were all above 60% after the second spraying 15 d, but 5% Chlorantraniliprole SC showed the best control efficacy by 94.9%. The results indicated that alternating of the five insecticides could achieve the best control efficacy. |
| Key words: Chinese fir seed orchards, seed pests, insecticide, control efficacy |
