| 摘要: |
| 2001～2003年分别对陕西渭北苹果产区主要发生的早期落叶病进行了系统调查，初步明确了苹果早期落叶病的发生种类，其中以苹果斑点落叶病(Altemaria mali Roberts)、苹果褐斑病(Marssonina coronarian（Ell．Et Davis）Davis)和苹果圆斑病(Phyllostcca solitaria)发病最重，病叶率49.62%～10.36%，病情指数14.82～2.33；苹果灰斑病(Phyllosticta pirina Sacc)发生较轻,病情指数0.31。同时选用10种无公害药剂进行防治效果比较试验、药剂搭配组合试验、年防治次数试验等研究，结果表明,40%福星WP 3 000倍液和50%朴海因WP 1 500倍液的防效最好，年防治次数以5～7次为宜。 |
| 关键词: 苹果 早期落叶病 发病规律 药剂防治 |
| DOI： |
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| 基金项目:科技部“十五”重点攻关项目(2002BA516A10) |
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| The study of regularity of apple early defoliation disease and its control by fungicide |
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| Abstract: |
| The apple early defoliation disease was systematically investigated in WeiBei apple growing areas in 2001-2003.The kinds of this disease had been confirmed and there were apple alternaria leaf spot Altemaria mali Roberts,apple brown spot (Marssonina coronarian（Ell．et Davis）Davis),and apple fruit blotch (Phyllosticta solitaria).The ratio of disease leaves was 49.62%-10.36%，and the disease index was only 14.82-2.33.However,the apple gray leaf spot (Phyllostcca pirina Sacc) occurred very slightly,and the disease index was 0.31.It showed that by comparing 10 environment friendly fungicides and alternative application of fungicides and the frequencies,the control effect of Nustare (40% flusilazole WP 3 000×) and 50% iprodione WP 1 500× were desirable,and 5-7 applications per year was suitable. |
| Key words: apple early defoliation regularity chemicontrol |
