Resistance in Barley (<i>Hordeum vulgare</i>L.) to New Invasive Aphid, Hedgehog Grain Aphid (<i>Sipha maydis</i>, Passerini) (Hemiptera: Aphididae)

• 作者: J. S. Armstrong
• 来源期刊: 美国植物学期刊(英文)
• 学科: 农学
• 关键词: Greenbug Resistance Russian Wheat Aphid Resistance Aphid Resistance Antixenosis Plant Damage Ratings Hedgehog Grain Aphid
• 年，卷（期）: 2020,（6）
• 页码范围: 869-879
• 页数: 11页
• 分类号: S51

摘要

<div style="text-align:justify;"> <i><span style="font-family:Verdana;">Sipha</span></i><span style="font-family:Verdana;"> <i>maydis</i></span><span style="font-family:""><span style="font-family:Verdana;"> Passerini (Hemiptera: Aphididae) is a pest of cereals in many regions of the world and was identified as an invasive pest of the US in 2007. Regional surveys from 2015-2017 revealed this pest was broadly distributed throughout many of the western Great Plains states where it is a potential threat to cereal production. The common name hedgehog grain aphid, HGA, has been associated with </span><i><span style="font-family:Verdana;">Sipha</span></i> <i><span style="font-family:Verdana;">maydis</span></i><span style="font-family:Verdana;"> in the US. Cross-resistance where a plant is resistant to one aphid species and is also resistant to another species</span></span><span style="font-family:Verdana;"> that</span><span style="font-family:""><span style="font-family:Verdana;"> is known to occur. Six barleys were evaluated for cross-resistance to HGA: Russian wheat aphid, RWA, resistant germplasms STARS 9301B and STARS 9577B and cultivar “Mesa”;greenbug, GB, resistant germplasm STARS 1501B and cultivar “Post 90”;and RWA and GB resistant experimental line 00BX 11-115. Cultivars “Morex” and “Schuyler” were susceptible controls. Antixenosis was measured 5 days after infestation by HGA. Seedling damage ratings and reductions in seedling growth were recorded after 17 days of infestation. Intrinsic rate of increase, </span><i><span style="font-family:Verdana;">r</span>_{<span style="font-family:Verdana;">m</span>}</i><span style="font-family:Verdana;">, of HGA was determined by following the development of newborn aphids to adulthood and reproduction. 00BX 11-115 and Post 90 had significantly greater antixenosis (fewer aphids/seedling), significantly lower plant damage ratings, and significantly lower intrinsic rates of increase than other entries. Differences in seedling growth were not significan