Joint study on the export orchid plants in Thailand

1992年至1994年在泰国和日本进行了为期三年的大学间合作研究。在泰国南部、中部和北方的四十多个兰花苗圃进行了实地调查。两所大学的科学家对园艺学、昆虫学、动物学、植物病理学和土壤学的各个学科进行了调查。1994年取得的主要结果如下：1）建立了泰国兰花杂交种的数据库; 2）指出了栽培品种、组织培养技术和栽培方法等园艺学上存在的问题; 3）从兰花苗圃中收集到昆虫13目53科。其中有23种为兰科植物的食蚜蝇，其中包括许多兰科植物的新记录种。本文报道了在泰国兰科植物上新发现的8种盾蚧科和假蚧科。在泰国兰花中还首次发现了2种蚜虫; 4）在泰国兰花中检测到CyMV，但未检测到ORSV; 5）研究了栽培用活性炭对磷的吸附。木炭对磷的吸收系数在800 ~ 1000之间，取决于磷的添加浓度。6）提出了更好地管理兰花的建议。7）山口大学农学部发表了一份报告。

The joint study was made from 1992 to 1994 for three years in Thailand and Japan as University-to-Unviersity Cooperative Research. Field surveys were carried at more than forty orchid nurseries in the southern, central and northern parts of Thailand. Various subjects in horticulture, entomology, zoology, plant pathology and soil science were investigated by scientists of two universities. Main results obtained in 1994 are as follows.1) Data base of the phylogey of Thai hybrid species is prepared.2) Horticultural problems such as cultivation species, tissue culture techniques and cultivation methods are pointed out.3) A total of 13 insect orders and 53 families were collected from orchid nurseries. A total of 23 species among them were found feeding orchids including many new recorded species from orchids. Eight species of Diaspidae and Pseudococcidae were newly found from orchids in Thailand. Two aphid species were also recorded from Thai orchids for the first time.4) CyMV was detected from the symptomless orchid plants, but no ORSV was found.5) P adsorption of charcoal used for cultivation was investigated. The phosphate absorption coefficients of charcoal range between 800 and 1,000, depending upon the concentration of P added.6) Suggestions for better management of orchids are given.7) A report containing the results has been published by the Faculty of Agriculture, Yamaguchi University.