A fungicidal composition for plants containing phosphonate (PO 3 ) and phosphate (PO 4 ) salts, and derivatives thereof is disclosed. The composition provides a single product which may be employed to control a Phytophthora infestans infection in plants.John B. Taylor...
B、the study of the organisms and environmental factors that cause diseases in animals, mechanisms by which they cause disease, and methods of managing diseases and reducing damage. C、the study of the organisms and environmental factors that cause diseases in plants, mechanisms by which they cause...
caused by fungus which attacks the plant in the form of a model or smut or rust.Frequently such a primary infection will weaken the plant so that a secondary infection may result form its lack of tolerance.The symptoms(症状) shown may cause an error in diagnosis, so that treatment may be...
Center rot of onion, caused by the Gram-negative, facultatively anaerobic bacterium, Pantoea ananatis, was first described in Georgia, USA, in 1997. The di... TA Coutinho,T Goszczynska,C Lennox,... - Bacterial Diseases of Plants in South Africa 被引量: 2发表: 2009年 ...
The symptoms shown may cause an error in diagnosis, so that treatment may be directed toward bacteria which could be the result of a susceptibility caused by a primary virus infection.What is the main idea of the second paragraph A. Some plants have relative immunity to a great many ...
Plant Diseases Caused by Fastidious Prokaryotes 来自 astralint.com 喜欢 0 阅读量: 19 作者:A Varma,SP Raychaudhuri 关键词: Congresses, Prokaryotes, Mycoplasma-like organisms, Phytopathogenic, Mycoplasma diseases in plants, Mycoplasma-like diseases of plants 年份: 1989 ...
Diseases Caused by Parasitic Plants Usually we think of parasites as lower forms of plant life such as bacteria, fungi or nematodes. However, a number of flowering or seed plants are parasites on other plants. Parasitic seed plants vary widely in their dependence on a host... GB Lucas,CL ...
C.Some plant diseases may be indirectly caused by men. D.A primary infection may lead to a secondary infection. 相关知识点: 试题来源: 解析 答案见解析 1.B.细节理解题.由文章第一段第二句It has been estimated that some 30,000 different diseases attack our economic plants: forty are known...
fruit trees by the aphid, and some plants by species of insects that form galls on leaves and branches, such as arachnids (mainly plant-eating ticks, among which the most widespread and harmful are the spider mite and the fruit mite). (The disease caused by arachnids is called arachnophyto...
Symptoms of virus diseases in plants. 2nd ed. Centre for Agricultural Publishing and Documentation. Wageningen. The Netherlands. 206 p... CPD Jager - 《Netherlands Journal of Plant Pathology》 被引量: 29发表: 1979年 The Wolof of Saloum: social structure and rural development in Senegal Bos, ...