[Species and ecological control of disease on cultivated Gentiana rigescens in Yunnan].
OBJECTIVE
To find out variety of the fungal diseases of cultivated Gentiana rigescens and provide important basis for prevention.


METHODS
The diseases were diagnosed based on field investigate, symptoms observation, pathogen isolation, determination the size of morphological and verification following the Koch's Postulate procedures.


RESULTS
Anthracnose (Colletotrichum gloeosporioides), grey mould (Botrytis cinerea), brown spot (Alternaria tenuis), rust (Aecidiumpers), circular spot (Pestalotiopsis), leaf blight (Stemphylium, Ascochyta, Pleospora) and nematodes (Heterodera spp., Meloidogyne spp.) were found on Gentiana rigescens. Anthracnose was the first main disease, the diseased plant rate was over 40% and disease severity was 4 - 5 degree and second disease was rust, incidence of rate was less 10% and other diseases rate was not enough 2%.


CONCLUSIONS
All these diseases on Gentiana rigescens are reported for the first time and Gentiana rigescens is the new host plant of the diseases.
Medicinal Plant Institute, Yunnan Academy of Agricultural Sciences, Kunming 650231, China. lqlzhaozl@163.com
Zhen-Ling
ZL
Zhao
Jin-Yu
JY
Zhang
Hang
H
Jin
Mei-Quan
MQ
Yang
Wei-Ze
WZ
Yang
Yan
Y
Yang
Tian-Mei
TM
Yang
Ya-Na
YN
Shi
Shao-Bing
SB
Yang
Li
L
Liu
D000383:Agriculture / Q000379:methods*; D002681:China; D004463:Ecology; D017753:Ecosystem; D005659:Fungicides, Industrial / Q000008:administration & dosage; D030012:Gentiana / Q000254:growth & development / Q000382:microbiology*; D003904:Mitosporic Fungi / Q000302:isolation & purification*; D010935:Plant Diseases / Q000145:classification / Q000382:microbiology* / Q000517:prevention & control*; D018515:Plant Leaves / Q000382:microbiology; D010946:Plants, Medicinal / Q000254:growth & development / Q000382:microbiology
D005659:Fungicides, Industrial