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Organic Mulch Increases Insect Herbivory by the Flea Beetle Species, Disonycha glabrata, on Amaranthus spp.
Insects ( IF 3 ) Pub Date : 2020-03-03 , DOI: 10.3390/insects11030162
Roger V. Vorsah , Beatrice N. Dingha , Sudan Gyawaly , Sarah A. Fremah , Harmandeep Sharma , Arnab Bhowmik , Mulumebet Worku , Louis E. Jackai

Amaranth (Amaranthus spp.) is an increasingly high-valued niche vegetable crop among small organic growers in North Carolina, due to its increasing demand among diverse immigrant groups. Production is however hampered by insect pests such as the flea beetle (FB), Disonycha glabrata (Coleoptera: Chrysomelidae), that cause significant yield reduction. Chemical insecticides are generally applied for pest control despite their known risks to health and the environment. Integrated pest management (IPM), which is a cost effective and environmentally friendly approach is still under-exploited in vegetable production by small growers. We studied IPM approaches, suitable for organic production of amaranth by screening nine amaranth varieties for resistance to the flea beetle (FB), D. glabrata, grown with, and without, mulch. D. glabrata population was 60% higher in plots with mulch compared to plots without. The amaranth varieties Molten fire and Green Callaloo recorded the lowest and the highest beetle population commensurate with low, and high leaf damage, respectively. Conversely, leaf yields in the mulched plots were 50% less than recorded in the zero-mulch counterpart, with Green Callaloo variety recording the lowest. These findings will serve as building blocks for a sustainable pest management plan that is appropriate for organic production of Amaranthus spp. in North Carolina.

中文翻译:

有机覆盖物通过A属植物跳蚤甲壳虫(Disonycha glabrata)的食草性增加。

mar菜(Amaranthus spp。)是北卡罗来纳州小型有机种植者中一种价值越来越高的利基蔬菜作物,这是由于其对各种移民群体的需求不断增加。但是,生产受到昆虫虫害的影响,例如跳蚤甲虫(FB),光滑石竹Disonycha glabrata)(鞘翅目:金眼科),这会大大降低产量。尽管化学杀虫剂已知对健康和环境构成威胁,但它们通常用于控制害虫。小型虫农在蔬菜生产中仍未充分利用病虫害综合防治(IPM)技术,是一种经济有效且环保的方法。我们通过筛选9种a菜品种对跳蚤甲虫(FB)的抗性,研究了适用于organic菜有机生产的IPM方法,d。有或没有覆盖物的glabrata。与没有覆盖的地块相比,有覆盖地块的D. glabrata种群高60%。a菜品种Molten fireGreen Callaloo分别记录了最低和最高的甲虫种群,分别对应于叶片的高低伤害。相反,覆盖地块的叶子产量比零覆盖地块的记录要低50%,其中Green Callaloo品种的记录最低。这些发现将作为适合于A有机生产的可持续有害生物管理计划的基础。在北卡罗来纳州。
更新日期:2020-04-20
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