Improved environmental management can make it more difficult for disease vectors such as mosquitoes to survive and to breed.
改善环境管理可使蚊虫等疾病媒介生存和孳生更加困难。
To select the improved varieties of Tung trees is a main approach to prevent the breed from degenerating.
油桐选优去劣是防止品种退化、实现油桐良种化的主要途径。
The varieties of hongyu seed breeding and research staff carefully purification, make the breed in similar products in the yield, disease resistance and the palate has improved greatly.
该品种系宏宇种业科研人员精心提纯繁育而成，使该品种在同类产品中产量、抗病性及口感均有较大提高。
The varieties of hongyu seed breeding and research staff carefully purification, make the breed in similar products in the yield, disease resistance and the palate has improved greatly.
该品种系宏宇种业科研人员精心提纯繁育而成，使该品种在同类产品中产量、抗病性及口感均有较大提高。
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