按农艺学和用途可将中国作物分为8大类即粮食作物、经济作物、蔬菜作物、果树作物、饲用和绿肥作物、花卉作物、药用作物和林木作物。

The 8 kinds: food crop, economic crop, vegetable crop, fruit crop, forage and manure crop, flower crop, medicine crop and forest crop in China, according to agronomy and use were differentiated.

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因为它们对经济作物的极大危害引起了很多国家和科学界的重视，滤过性微生物学就是研究植物病毒的学科。

This group of diseases, because of their economic importance has received due attention in many countries and science of virology has been established.

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