History

1 Introduction Poplar bathroomker is the main poplar stems diseases. tumesce type canker is the more or less widespread and the most well(p) fungal disease. Pathogen is Dothiorella gregaria Saccardo, sexual generation is Botryosphaeria dothidea It can harm carcass and fruit of trees, leading to the whole trees die and economic loss. In recent years, with the improving of the life level and protecting environmental awareness, people pay more attention on the geographic expedition of intrinsic product as healthful materials. The install country with a remarkable diversity in producing natural compounds has achieve a special interest. How to utilize comprise imaginativeness effectively? This is a key problem we should considerate. works inherent oil colour is a kind of liquid which can distillate from the plants body. It has certain(p) volatility and it is the secondary metabolites in plants. It is mainly serene of aliphatic compound and aromatic compound, ter penoids, nitrogen and sulfur compound. Plant essential oils lease been shown to possess multi-biological activities?such as antimicrobial? insecticidal and antioxidant properties. They have received much attention to prevent plant and physical diseases.

With many synthetic fungicides are limited, it is necessary to engender newly fungicide. Because of the essential oil is non-toxic, harmless, pure natural. It has great look for apprise in the natural antibacterial activity. The purpose of this sight is to quiz out plant essential oils which have sizeable proscription to blister type poplar canker and brook a basic way to control the poplar canker. 2 Materials and Methods 2.1 observational route 2.2 Plant Materi! als Platycladus orientalis Nardostachys chinensis Pinus tabulaeformis Periploca sepium genus Valeriana officinalisIf you want to carry a full essay, order it on our website: OrderEssay.net

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