Current situations in nematode damage to sesame in Myanmar and development of its control measures

2019 Fiscal Year Final Research Report

• Project/Area Number: 16H05782
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Plant nutrition/Soil science
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: Toyota Koki 東京農工大学, (連合)農学研究科(研究院), 教授 (30262893)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Keywords: 植物寄生性線虫 / リアルタイムPCR / マメ科緑肥 / マリーゴールド / 孵化促進

Outline of Final Research Achievements

Pigeon pea cyst nematode (PCN) is an economically important plant parasitic nematodes in sesame production. PCN was detected in as high as 63% of the fields in Magway. In Mandalay and Nay Pyi Taw, PCN was detected in 40% and 21% in the fields. By contrast, PCN was not detected in all the tested soils in Sagaing. Root-knot nematodes (RKN) were not detected in 88% of the total fields, indicating that sesame may decrease the density of RKN. One to two months cultivation of leguminous green manure and subsequent incorporation decreased the density of PCN. Marigold was the most effective crop in the reduction of PCN density. The present study proposed to grow leguminous plants or marigold for a short period to suppress the density of PCN and to improve soil fertility.

Free Research Field

土壌肥料

Academic Significance and Societal Importance of the Research Achievements

ゴマの最大生産地Magwayではキマメシストセンチュウ汚染が広がっていること、線虫害によりゴマの生産性が低下している恐れが判明した。一方、ゴマを栽培すると、マメ類の主要害虫であるネコブセンチュウ密度が低下するという副次的な効果を見出した。本線虫の密度低減策としては、水稲との輪作、マメ科緑肥あるいはマリーゴールドを1-2カ月栽培し、すき込むことが有効であると考えられた。