{"id":2334,"date":"2022-12-20T09:18:02","date_gmt":"2022-12-20T02:18:02","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=2334"},"modified":"2023-11-24T15:02:46","modified_gmt":"2023-11-24T08:02:46","slug":"project-breeding-and-planting-method-development-of-chukrasia-tabularis-for-high-productivity-and-tolerance-of-shoot-tip-borer-in-vietnam","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2022\/12\/project-breeding-and-planting-method-development-of-chukrasia-tabularis-for-high-productivity-and-tolerance-of-shoot-tip-borer-in-vietnam\/","title":{"rendered":"Project: Breeding and planting method development of Chukrasia tabularis<\/em> for high productivity and tolerance of shoot-tip borer in Vietnam."},"content":{"rendered":"

GENERAL INFORMATION:<\/strong><\/p>\n

Funding institution<\/strong>: Ministry of Agriculture & Rural Development of Vietnam<\/p>\n

Project lead organization<\/strong>: Vietnamese Academy of Forest Sciences<\/p>\n

Project implementation organization<\/strong>: Forest Protection Research Centre<\/p>\n

Project leader<\/strong>: Dr. Nguyen Minh Chi<\/p>\n

Implementation time<\/strong>: 2018-2022<\/p>\n

\"\"<\/a><\/p>\n

TARGETS AND RESEARCH CONTENTS:<\/strong><\/p>\n

Targets:<\/strong><\/p>\n

– To select 100 plus trees of Chukrasia tabularis<\/em> in the Northwest and North Central regions.<\/p>\n

– To identify at least 1 provenance and 5 families of C. tabularis<\/em> that show resistance to shoot-tip borer and have growth exceeding 15% of commercial varieties.<\/p>\n

– To establish 14 ha of intensive plantings with 15% better growth, and at least 80% less damage from shoot-tip borer than production plantations.<\/p>\n

– To identify control measures for management of shoot-tip borer in C. tabularis<\/em> plantations, and for it to be recognized as technically advanced.<\/p>\n

– To develop a technical guide for intensive afforestation of C. tabularis<\/em>.<\/p>\n

Research contents:<\/strong><\/p>\n

Content 1: Research on factors affecting the possibility of damage by shoot-tip borer in C. tabularis<\/em> plantations, and update the pests and diseases of C. tabularis<\/em>.<\/p>\n

Content 2: Research on breeding of C. tabularis<\/em>.<\/p>\n

Content 3: Research on resistance mechanisms of C. tabularis<\/em> to shoot-tip borer<\/p>\n

Content 5: Research on intensive afforestation of C. tabularis<\/em>.<\/p>\n

Content 6: Development of technical guidelines for integrated pest management of shoot-tip borer, intensive afforestation and training.<\/p>\n

\"\"<\/a><\/p>\n

Key results<\/strong>:<\/p>\n

Chukrasia tabularis<\/em> plantations in Vietnam are vulnerable to economic loss with more than 50% of trees being damaged by the shoot-tip borer (Hypsipyla robusta<\/em>). This Project investigated factors contributing to damage and identified technical options to reduce damage and control the pest. The project also developed a technical guide for intensive afforestation of C. tabularis <\/em>that has been approved by the Scientific Council of the Vietnamese Academy of Forest Sciences.<\/p>\n

Chukrasia tabularis<\/em> plantations were most susceptible to shoot-tip borer at low (>300 m) altitude whereas plantations at 600-900 m altitude were less susceptible to shoot-tip borer. Trees were susceptible to damage at 1-2 years of age. Furthermore, plantations on deep, fertile and moist soils had superior growth and stem form, and were less susceptible to shoot-tip borer damage.<\/p>\n

Plus trees (116 in total) were selected in 11 provinces and 2 family trials were established in Hoa Binh (3 ha) and Nghe An (3 ha) provinces. So far, 6 families (LH26, LH32, LH33, LH87, LH97, LH108) and two provenances (Thanh Hoa, Hoa Binh) were identified as having superior growth and tolerance to H. robusta<\/em>.<\/p>\n

Three resistance mechanisms were identified: \u00a0(1) The presence of physical feeding barriers – trees with shorter internodes, thicker and harder bark, and densely hirsute; (2) The presence of chemical barriers – trees containing antagonistic endophytic bacteria (Bacillus bombysepticus<\/em>, B. velezensis<\/em>) or high concentrations of insecticidal limonoid compounds; and (3) The ability of trees to recover (form a new central leader) after being damaged by the shoot-tip borer.<\/p>\n

The project identified control measures for management of shoot-tip borer in C. tabularis<\/em> plantations, and this has been recognized as technically advanced (TBKT 01-115: 2022\/BVTV).<\/p>\n

Lastly, the Project showed that improved silviculture (e.g. use of inorganic fertilizer, and weed control) could enhance growth and reduce shoot-tip borer damage.<\/p>\n

\"\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

GENERAL INFORMATION: Funding institution: Ministry of Agriculture & Rural Development of Vietnam Project lead organization: Vietnamese Academy of Forest Sciences Project implementation organization: Forest Protection Research Centre Project leader: Dr. Nguyen Minh Chi Implementation time: 2018-2022 TARGETS AND RESEARCH CONTENTS: Targets: – To select 100 plus trees of Chukrasia tabularis in the Northwest and North […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[24,7],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2334"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/comments?post=2334"}],"version-history":[{"count":8,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2334\/revisions"}],"predecessor-version":[{"id":2420,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2334\/revisions\/2420"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=2334"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=2334"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=2334"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}