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Resistance of Bt-maize (MON810) against the stem borers Busseola fusca (Fuller) and Chilo partellus (Swinhoe) and its yield performance in Kenya
Crop Protection ( IF 2.8 ) Pub Date : 2016-11-01 , DOI: 10.1016/j.cropro.2016.07.023
Tadele Tefera 1 , Stephen Mugo 2 , Murenga Mwimali 3 , Bruce Anani 2 , Regina Tende 3 , Yoseph Beyene 2 , Simon Gichuki 3 , Sylvester O Oikeh 4 , Francis Nang'ayo 4 , James Okeno 4 , Evans Njeru 5 , Kiru Pillay 6 , Barbara Meisel 6 , B M Prasanna 2
Affiliation  

A study was conducted to assess the performance of maize hybrids with Bt event MON810 (Bt-hybrids) against the maize stem borer Busseola fusca (Fuller) in a biosafety greenhouse (BGH) and against the spotted stem borer Chilo partellus (Swinhoe) under confined field trials (CFT) in Kenya for three seasons during 2013–2014. The study comprised 14 non-commercialized hybrids (seven pairs of near-isogenic Bt and non-Bt hybrids) and four non-Bt commercial hybrids. Each plant was artificially infested twice with 10 first instar larvae. In CFT, plants were infested with C. partellus 14 and 24 days after planting; in BGH, plants were infested with B. fusca 21 and 31 days after planting. In CFT, the seven Bt hybrids significantly differed from their non-Bt counterparts for leaf damage, number of exit holes, percent tunnel length, and grain yield. When averaged over three seasons, Bt-hybrids gave the highest grain yield (9.7 t ha−1), followed by non-Bt hybrids (6.9 t ha−1) and commercial checks (6 t ha−1). Bt-hybrids had the least number of exit holes and percent tunnel length in all the seasons as compared to the non-Bt hybrids and commercial checks. In BGH trials, Bt-hybrids consistently suffered less leaf damage than their non-Bt near isolines. The study demonstrated that MON810 was effective in controlling B. fusca and C. partellus. Bt-maize, therefore, has great potential to reduce the risk of maize grain losses in Africa due to stem borers, and will enable the smallholder farmers to produce high-quality grain with increased yield, reduced insecticide inputs, and improved food security.

中文翻译:

Bt-玉米(MON810)对螟虫Busseola fusca(Fuller)和Chilo partellus(Swinhoe)的抗性及其在肯尼亚的产量表现

进行了一项研究,以评估具有 Bt 事件 MON810(Bt 杂交种)的玉米杂交种在生物安全温室 (BGH) 中对抗玉米螟虫 Busseola fusca (Fuller) 和在密闭条件下对抗斑点螟虫 Chilo partellus (Swinhoe) 的性能。 2013-2014 年在肯尼亚进行了三个季节的田间试验 (CFT)。该研究包括 14 个非商业化杂交种(七对近等基因 Bt 和非 Bt 杂交种)和四个非 Bt 商业化杂交种。每株植物用10只一龄幼虫人工侵染两次。在 CFT 中,植株在种植后 14 天和 24 天被 C. partellus 侵染;在 BGH 中,植物在种植后 21 天和 31 天被灰褐色双歧杆菌侵染。在 CFT 中,七个 Bt 杂种与非 Bt 杂种在叶片损伤、出口孔数、隧道长度百分比和谷物产量方面存在显着差异。当平均超过三个季节时,Bt 杂交种的谷物产量最高(9.7 t ha-1),其次是非 Bt 杂交种(6.9 t ha-1)和商业检验(6 t ha-1)。与非 Bt 杂交种和商业检查相比,Bt 杂交种在所有季节中的出口孔数和隧道长度百分比最少。在 BGH 试验中,在等值线附近,Bt 杂交种比非 Bt 杂交种遭受的叶片损伤始终较小。该研究表明 MON810 可有效控制 B. fusca 和 C. partellus。因此,Bt-玉米在降低非洲玉米螟虫造成的谷物损失风险方面具有巨大潜力,并将使小农生产优质谷物,提高产量、减少杀虫剂投入并改善粮食安全。其次是非 Bt 杂交(6.9 t ha-1)和商业支票(6 t ha-1)。与非 Bt 杂交种和商业检查相比,Bt 杂交种在所有季节中的出口孔数和隧道长度百分比最少。在 BGH 试验中,在等值线附近,Bt 杂交种比非 Bt 杂交种遭受的叶片损伤始终较小。该研究表明 MON810 可有效控制 B. fusca 和 C. partellus。因此,Bt-玉米在降低非洲玉米螟虫造成的谷物损失风险方面具有巨大潜力,并将使小农生产优质谷物,提高产量、减少杀虫剂投入并改善粮食安全。其次是非 Bt 杂交(6.9 t ha-1)和商业支票(6 t ha-1)。与非 Bt 杂交种和商业检查相比,Bt 杂交种在所有季节中的出口孔数和隧道长度百分比最少。在 BGH 试验中,Bt 杂种在等值线附近比它们的非 Bt 受到的叶片损伤始终较小。该研究表明 MON810 可有效控制 B. fusca 和 C. partellus。因此,Bt-玉米在降低非洲玉米螟虫造成的谷物损失风险方面具有巨大潜力,并将使小农生产优质谷物,提高产量、减少杀虫剂投入并改善粮食安全。与非 Bt 杂交种和商业检查相比,Bt 杂交种在所有季节中的出口孔数和隧道长度百分比最少。在 BGH 试验中,在等值线附近,Bt 杂交种比非 Bt 杂交种遭受的叶片损伤始终较小。该研究表明 MON810 可有效控制 B. fusca 和 C. partellus。因此,Bt-玉米在降低非洲玉米螟虫造成的谷物损失风险方面具有巨大潜力,并将使小农生产优质谷物,提高产量、减少杀虫剂投入并改善粮食安全。与非 Bt 杂交种和商业检查相比,Bt 杂交种在所有季节中的出口孔数和隧道长度百分比最少。在 BGH 试验中,在等值线附近,Bt 杂交种比非 Bt 杂交种遭受的叶片损伤始终较小。该研究表明 MON810 可有效控制 B. fusca 和 C. partellus。因此,Bt-玉米在降低非洲玉米螟虫造成的谷物损失风险方面具有巨大潜力,并将使小农生产优质谷物,提高产量、减少杀虫剂投入并改善粮食安全。
更新日期:2016-11-01
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