Resistance test of several sweet potato genotypes against sweetpotato weevil Cylas formicarius Fabricus (Coleoptera: Curculionidae) in the lowlands

[摘要] The sweetpotato weevil (SPW), Cylas formicarius Fabricius, is the main pest in sweet potatoes and spread throughout the world. One of the efforts that can be used to reduce SPW attacks is to use sweet potato genotypes that contain high beta-carotene. The objective of this research was to know the resistance level of some sweet potato genotypes to sweetpotato weevil in the lowlands. This research used a randomized block design with one factor, namely sweet potato consisting of 5 genotypes that came from different accessions (Saribu Dolok Simalungun, Kesemak Simalungu, Batang Beruh Dairi, Binjai accession and National Superior Varieties Beta-1). This research was carried out in Cengkeh Turi, Binjai Utara, Sumatera Utara from April to August 2018. The results showed that the lowest intensity and percentage of attack was on sweet potato accession of Saribu Dolok Simalungun, which was 7.94% and 27.08% respectively while the highest intensity and percentage of attack was on sweet potato accession of Batang Beruh Dairi, which was 18.60% and 48.7% respectively. It is recommended that Saribu Dolok accession is more resistance rather than others and suitable to grow on low land.

[发布机构] Faculty of Agriculture, Universitas Sumatera, Utara, Indonesia^1

[效力级别] 生态环境科学

[关键词] Block designs;Coleoptera;Curculionidae;High beta;One-factor;Resistance level;Resistance tests;Sweet potato