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。
2
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。
3
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.