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What are the excellent breeding pig breeds introduced into China from abroad?
There are five famous pig breeds in the world today, namely the Large Yorkshire pig, the Landrace pig, the Duroc pig, the Hampshire pig, and the Pietrain pig, which are known for their fast growth rate, high feed conversion rate, high carcass lean meat rate, wide distribution, and large rearing numbers. (I) Large Yorkshire pig 1. Origin
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How to Prevent and Control Raspberry Crown Gall Disease? A Full Analysis of Practical Methods
In recent years, raspberries introduced from abroad have suffered fairly severe crown gall disease during cultivation. Crown gall disease occurs mainly at the root crown, and sometimes is also scattered on lateral roots and branch roots. The diseased part is initially milky white, smooth and soft, and later gradually turns brown to dark brown, with a hard texture