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首页> 外文期刊>The Journal of Horticultural Science & Biotechnology >Screening studies on the host range of branched broomrape (Orobanche ramosa).
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Screening studies on the host range of branched broomrape (Orobanche ramosa).

机译：对分支b帚（Orobanche ramosa）寄主范围的筛选研究。

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摘要

Studies on the host range of Orobanche ramosa L., by screening different Summer and Winter crops, medicinal herbs, and a large number of weeds for possible attack by the parasite, revealed substantial variation among species in the number and vigour of parasites attached to their roots. The crops and medicinal herbs most affected were: Apium graveolens, Carthamus tinctorius, Carum carvi, and Trachyspermum ammi (with 36-214 Orobanche shoots per pot). Among the crops studied, Ammi visnaga, Brassica nigra, B. oleracea var. botrytis, Cucurbita moschata, Linum usitatissimum, Lupinus albus, and Raphanus sativus were least infected (with 1-2 Orobanche shoots per pot). Weeds, including Datura metel, Ferula communis, and Rumex acetosella were heavily infected (with 40-67 shoots per pot). In contrast, Antirrhinum orontium, Convolvulus arvensis, Diplotaxis erucoides, Polygonum aviculare and Solanum cornutum showed extremely low infection (with 1-2 shoots per pot). T. ammi is reported, for the first time, as a potential "trap species" for O. ramosa. Other plants tested are useful as "catch species" and both may be used effectively to manage infestation by the parasite by their inclusion in crop rotation or intercropping systems. Non-host species, or those that allowed very low parasite attachment may be grown in fields heavily-infested by the parasite. Control of highly-infected weed species is necessary to prevent parasite multiplication and spread. However, timing this operation after parasite attachment, or before emergence may be effective in exhausting the soil seed-bank, providing the weeds do not pose a serious competition with the crop plants. Many of the plant species tested were not attacked, suggesting a different mechanism of resistance, or lack of stimulants for O. ramosa seed germination. Of the species reported to be good "trap crops" for this parasite, L. usitatissimum showed very low infection, but B. campestris, C. frutescens, C. annuum, Coriandrum sativum, and T. foenum-graecum were heavily infected.
机译：通过筛选夏季和冬季的不同农作物，草药和大量杂草以防被该寄生虫侵袭，对Orobanche ramosa L.寄主范围的研究表明，附着在其上的寄生虫在数量和活力上存在很大差异。根。受影响最严重的农作物和药材是：重瓣芹菜，红花红花，Carum carvi和Trachyspermum ammi（每盆36-214个Orobanche芽）。在所研究的农作物中，Ammi visnaga，芸苔，B。oleracea var。葡萄孢菌，南瓜属，亚麻属，甜叶羽扇豆和萝卜丝的感染最少（每盆1-2个Orobanche芽）。杂草，包括曼陀罗梅图尔（Datura metel），费拉草（Ferula communis）和小菜蛾（Rumex acetosella）被重度感染（每盆40-67枝）。相比之下，Antirrhinum orontium，Convolvulus arvensis，Diplotaxis erucoides，Polygonum aviculare和Solanum cornutum的感染率极低（每盆1-2个芽）。 T. ammi首次被报道为O. ramosa的潜在“陷阱种”。通过测试的其他植物也可用作“捕获物种”，并且通过将其包括在作物轮作或间作系统中，两者都可有效用于控制寄生虫的侵扰。非寄主物种或允许极低寄生虫附着的物种可能会在受到该寄生虫严重侵扰的田地中生长。控制高度感染的杂草物种对于防止寄生虫繁殖和传播是必要的。但是，只要杂草不会与农作物发生严重竞争，在寄生虫附着后或出苗前进行此操作可能会有效耗尽土壤种子库。测试的许多植物物种均未受到攻击，这表明其抗药性不同的机制，或缺少用于O. ramosa种子发芽的刺激剂。在被报道为该寄生虫的良好“诱捕作物”的物种中，usitatissimum的感染率很低，但campestris，C。frutescens，C。anumum，Coriandrum sativum和T. foenum-graecum受到严重感染。

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