Therefore, when Jiang Zhongwu, vice-dean of Yantai Agricultural Academy, invited him for joint research projects, he jumped at the opportunity immediately as he believed the collaboration would benefit farmers in both countries.

It proved to be a fruitful decade. By experimentally cross breeding apple varieties, Blagov has developed 36 new and good quality apple varieties with strong anti-virus features. Some of the apples are expected to enter the market as China-branded apples in the near future.

"When people talk about Yantai apples, they mean hongfushi. But Blagov has helped to enrich our apple varieties, making it possible for product upgrading in the near future. That'll enhance our competitiveness on the global stage," Jiang says.

The fruits of Blagov's labor go beyond tasty apples.

Jiang says Yantai's hongfushi apples have weak resistance against certain virus and require pesticide, resulting in added labor and monetary costs. Pesticide also raises food safety concerns.

It was Blagov, Jiang adds, who introduced the concept of "virus-free planting".

Many of his cross breeds have proven to have stronger resistance against viruses, and are expected to largely increase apple production.

To attain first-hand information for his cross-breeding experiments, Blagov is often seen walking in the apple gardens with a notebook or chatting up the farmers.

His colleague Song Laiqing calls him "a restless guy". Whenever Blagov is in China, Song says, his first request is to go to the apple gardens.

Song is very impressed by Blagov's sharp eyes, trained by his decades of experiences in fruit planting. He says Blagov can tell a seedling's productivity and virus resistance by its appearance. Song feels that the botanist's most praiseworthy attribute is his willingness to share his knowledge with his Chinese colleagues.

In the past decade, he has given numerous lectures to fruit researchers in the city. He organizes regular training sessions for young researches at Yantai Agricultural Academy. He teaches Chinese farmers how to make grape and cheery wines.

Believing China and Bulgaria have the same fruit research aim, Blagov initiated a talent exchange project between Yantai Agricultural Academy and Institute of Agriculture-Kyustendil, Bulgaria, in 2008.

"To be a researcher, it doesn't mean working only for yourself. You are obliged to share it with people who need to use them," Blagov says.

hanbingbin@chinadaily.com.cn

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