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in october of the golden autumn, the fojianxi pear in maoshanhou village, jinhaihu town, pinggu district entered the fruiting period, with large fruits hanging on the branches. since2021since 2006, ren zhengguang, associate professor of the school of biology and resources and environment of beijing agricultural university, has led students to establish a science and technology courtyard here to guide fruit farmers in carrying out green prevention and control of pear tree diseases and insect pests and professional management. this has not only solved the problem of pear ironhead disease that has plagued fruit farmers for many years. disease problems, and also improved fruit quality and yield. this year, the income of a multi-family pear garden in houcun, maoshan is expected to double.

10moon3on that day, ren zhengguang led the people stationed in the village to3students went from door to door to check the ripeness of the fruits. the fruit farmers are busy unpacking the fruits in the pear orchard. in a few days, the fruits will be dyed with a layer of pink "blush" under the sunlight. they will be naturally colored and sweet, and they will be ready for ripe picking and market. .

"professor ren is here! there are much less dark spots on the fruits here this year, and the pear psylla is basically invisible. come in and take a look, the leaves and peels are much smoother than last year!" villager lao ma enthusiastically greeted the teachers and students into the garden. , announced the good news with a smile, “last year this land was only covered with7000multiple bags, i must have them this year19000the yield rate can be 60 to 70%. i calculated, and the income can probably be doubled! "

it turns out that fojian pear has a long history of cultivation in houcun, maoshan, and is the village’s “golden brand”. due to its special nutritional value, taste and appearance, the price is two to three times higher than other varieties of pears on the market. in recent years, the village's pear trees have suffered from frequent pests and diseases. fruit farmers have tried various methods, but the results are not satisfactory. after the establishment of the science and technology academy, ren zhengguang led his students to search for the root cause of the disease from door to door. finally, by comprehensively measuring the element content of the pear orchard soil and pear fruit, he found the crux of the pear black skin disease and iron head disease problems - the abuse of chemical fertilizers and raw manure, leading to pear trees absorb unbalanced soil elements.

teachers and students adapted to local conditions to develop and promote microbial fertilizers and fungicides suitable for the planting and growth of fojianxi pear. they used green prevention and control methods such as releasing natural enemy insects, hanging pest traps, spraying microbial fungicides, and cultivating understory grass to reduce the risk of use of fertilizers and chemical pesticides. "if we want fruit farmers to trust and use new technologies, we have to speak for themselves with results." ren zhengguang said that for this reason, they built a "doctoral farm" in the village to focus on promoting and demonstrating green pest control based on biological control technology. control technology.

like lao ma, more and more fruit farmers have tasted the benefits of a bumper harvest and come to ask teachers and students for advice.

"for a single-layer fruit bag, you need to open the bottom of the bag for ventilation or tear the paper bag into long strips, and then remove the bag after a few days. when picking a double-layer bag, you can remove the outer bag first, and then remove the inner bag together with the binding wire after a few days. " ren zhengguang patiently explained that this is to give the fruit a process of gradually adapting to external environmental conditions and to achieve better coloring.

"the fruits on the tree are available regardless of working days and holidays." ren zhengguang said happily that with the joint efforts of teachers, students and fruit farmers, the quality and yield of fojianxi pears have been significantly improved this year. the students also plan to use their expertise to host live broadcasts to help villagers open up sales and let more people know about and taste the sweet and juicy fojianxi pears.

source: beijing daily client

reporter: he ruigannan

process editor: u027