李科明 舒海燕 常胜合 詹儒林

摘要：为了明确香蕉单宁含量与其对假茎象甲抗性的关系，采用香蕉假茎平均蛀道数比值法评价了6个香蕉品种对假茎象甲的抗性，用香草醛法测定了各品种香蕉叶柄和假茎的单宁含量并分析了单宁含量与其对假茎象甲抗性的关系。结果表明，广粉1号和海贡蕉对假茎象甲的抗性较强，南天皇和粤科1号抗虫性次之，宝岛蕉和巴西蕉抗虫性较差。香蕉叶柄和假茎单宁含量测定结果表明，香蕉各品种单宁含量差异较大，为7.21～16.60 mg/g，且香蕉假茎单宁含量高于叶柄。相关分析表明，香蕉假茎单宁含量与其对假茎象甲抗性呈显著负相关，而叶柄单宁含量与其对假茎象甲抗性无相关性。

关键词：香蕉品种;抗虫性;单宁;假茎象甲

中图分类号：S152      文献标志码：A      文章编号：1001-1463（2021）12-0043-05

doi：10.3969/j.issn.1001-1463.2021.12.010

Correlation Between Tannin Content in Petiole and Pseudostem of Banana and Its Resistance to Odoiporus longicollis（Oliver）

LI Keming， SHU Haiyan， CHANG Shenghe， ZHAN Rulin

（Haikou Experiment Station， Chinese Academy of Tropical Agricultural Sciences， Haikou Hainan 571101， China）

Abstract：To understand the relationship between the tannin content of banana and its resistance to pseudostem weevil， the resistance level of each banana cultivar to banana pseudostem weevil were evaluated by average ratio of borer hole number of larva of Odoiporus longicollis on six banana cultivars. The tannin content in banana petioles and pseudostems was determined by vanillin method， and the relationship between tannin content and insect resistance was analyzed. The results showed that Guangfen 1 and Haigongjiao had the strongest resistance to O. longicollis， followed by Nantianhuang and Yueke 1. Baodaojiao and Baxijiao showed the lowest resistance. The determination results of tannin content in banana petioles and pseudostems showed that the tannin content of banana cultivars varied from 7.21 mg/g to 16.60 mg/g， and the tannin content in pseudostem was higher than that in petiole. The correlation analysis showed that tannin content in pseudostem had a significantly negatively correlation with its resistance to O. longicollis， while the tannin content in petioles had no correlation with its resistance to O. longicollis.

Key words：Banana cultivars;Insect resistance;Tannin;Odoiporus longicollis

香蕉是重要的熱带水果，在我国华南农业经济发展中起到重要作用[1 ]。香蕉假茎象甲[Odoiporus longicollis （Oliver）]属鞘翅目、象虫科，是香蕉上的重要害虫，广泛分布于我国广西、广东、海南、福建、台湾、云南等地香蕉种植区。近年来香蕉假茎象甲危害日益严重，已经影响到我国香蕉产业健康发展。据报道，我国蕉园常年香蕉象甲有虫株率高达50%，为害率达60%～70%[2 - 4 ]。对于香蕉假茎象甲的防治，国内外仍主要采用化学农药防治[5 - 8 ]。虽然化学防治见效快、防治效果好，但长期大量使用化学农药易造成香蕉果实农药残留增高、蕉园环境污染加剧及害虫抗药性上升等问题。

采用抗病虫植物品种是植物病虫害综合防治的重要措施之一，已在多种植物病虫害防治实践中发挥作用[9 - 12 ]。……