|
|
|
| Studies on Morphology and Biological Characteristics of Botrytis elliptica
（Berk.）Cooke Causing Foliage Blight of Lilium davidii Duch. var. unicolor
（Hoog）Cotton |
| BAI Bin1，YANG Hua-lian2，HE Su-qin3*，YU An-fen1 |
（1Institute of Agricultural Quality Standards and Testing Technology，Gansu Academy of Agricultural Sciences，Lanzhou
730070，Gansu，China；2Agricultural Bureau of Lintao County， Lintao 730500， Gansu，China；3Institute of
Plant Protection，Gansu Academy of Agricultural Sciences，Lanzhou 730070，Gansu，China） |
|
|
|
|
Abstract Botrytis foliage blight is a main disease of Lilium davidii Duch. var. unicolor（Hoog）
Cotton in central region of Gansu Province．It becomes a devastating disease in rainy years．In June-
August of 2012，due to the heavier rainfall than the usual years，botrytis foliage blight of Lilium
davidii Duch. var. unicolor（Hoog）Cotton outbroke severely．The wilting plants reached to 50%-
70% in serious affected fields in mid-August．In some fields，almost all of the plants were killed．
The pathogens（ strain lily-1 and lily-2） were isolated from diseased leaf of Lilium davidii Duch. var.
unicolor（Hoog）Cotton．They were identified as Botrytis elliptica（ Berk.） Cooke，according to
Koch’s rule and morphology characteristics comparison．The mycelium can grow under 5-30 ℃，and the optimal temperature is 20-25 ℃. Mycelial growth is suppressed and the mycelia turned brown
at 30 ℃．Mycelia stops growing at 35 ℃，but it can recover growing after being cultured 7 days at
35 ℃ and then being transferred to 20 ℃ for 5 days culture. The temperature for sclerotia forming is
5-25 ℃．There are bigger variations in sclerotia forming time，position and size in different bacterial
strains，different culture temperatures or different repeats in the same bacterial strain．Sexual spores
are rare or extremely abundant．Conidia begins to germinate at 20 ℃ in 3-5 hours．The germination
rates can reach 50%-99% in 15 hours．Conidia produces 1-2 germ tubes usually，and forms 0-2 septa
in the middle of conidia.
|
|
Received: 16 April 2013
|
|
|
|
|
|
|
|
|
