| 春玉米不同栽培方式对亚洲玉米螟的影响 |
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| 引用本文： | 徐建亚.春玉米不同栽培方式对亚洲玉米螟的影响[J].安徽农业科学,2003,31(3):356-357,359. |
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| 作者姓名： | 徐建亚 |
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| 作者单位： | 江苏省盐城市计划生育指导所,江苏盐城,224002 |
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| 摘 要： | 研究了江苏沿海地区春玉米不同栽培方式对亚洲玉米螟的影响。调查结果表明 ,亚洲玉米螟各代次在玉米、棉花上的分布转移规律不受玉米栽培方式的影响 ,一致表现为 :1代基本上发生在玉米田 ;2代期有少量转入棉田为害 ,但仍以玉米田为主 ;3代期大多数转移到棉田为害 ,成为危害棉花的主害代次。从发生为害的数量来看 :1、2代亚洲玉米螟的差异不大 ,但在 3代期的棉田内发生了分化 ,春玉米直播类型区棉田的亚洲玉米螟百株虫量和铃害率分别为春玉米移栽类型区的 2 .12倍和 3 .2 0倍。笔者认为主要是由于移栽玉米田内的亚洲玉米螟发育进度加快 ,收获期提前又与 2代亚洲玉米螟最易受损的化蛹高峰期吻合 ,加之玉米收获物提早离田带走部分虫体等因素起了压低棉田 3代虫源基数的作用所致。通过调查还发现 ,春玉米育苗移栽的栽培技术对玉米来说 ,兼有节约用种量 ,解决苗期鼠害 ,苗床占地面积小有利于提高复种指数 ,生育期提早 7d左右 ,最终产量增加一成以上等效应
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| 关 键 词： | 春玉米 棉花 不同栽培方式 亚洲玉米螟 |
| 文章编号： | 0517-6611(2003)03-0356-02 |
Effect of Different Cultivation Patterns on Spring Corn on Asiatic Corn Borer |
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| Xu Jianya.Effect of Different Cultivation Patterns on Spring Corn on Asiatic Corn Borer[J].Journal of Anhui Agricultural Sciences,2003,31(3):356-357,359. |
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| Authors: | Xu Jianya |
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| Abstract: | Effect of different cultivation patterns on spring corn of Asiatic corn Borer in Jiangsu coastal area was studied in this paper. The results showed that planting pattern of spring corn didn't affect the distribution and the transfer of the insects of different generations between corn and cotton. The insects of 1st generation damaged corn only, and those of 2nd generation mainly damaged corn and lightly to cotton too. The most of the 3rd generation transferred to cotton filed became the mainly damage to cotton. The insects of 1st and 2nd generation showed little difference between corn and cotton in both number and damage, but those of 3rd generation didn't. The number per hundred cotton plants and the percent of harmed cotton boll of the insects of 3rd generation in the directly seeding field of spring corn were 2.12 and 3.20 times as many as in the transplanted field, respectively; the speculated reasons were that the harvesting time of corn was corresponded to the pupation period of the 2nd generation insect when the insects were much more likely to suffer injury because of the fast development of the insects and the earlier ripening of corn, and some insects were took away earlier from field with the harvest, resulting in the reduction of the basic number of 3rd generation insects in the cotton field in the transplanted field. It was also found that the transplant of the spring corn had many advantages, such as reducing rate of seeding, preventing injure from rats during the emergence period, decreasing the area of nursery bed to increase the multiple-cropping index, shortening the life period by 7 days, increasing the yield over 10 percent and so on. |
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| Keywords: | Spring core Cotton Cultivation pattern Asiatic corn borer Effect |
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