Identification and characterization of the endophytic bacterium Bacillus atrophaeus XW2, antagonistic towards Colletotrichum gloeosporioides

Table 3 Efficacy of strain XW2 in controlling poplar anthracnose under greenhouse conditions

Treatment	Diseased leaves rate (%)	Disease index	Greenhouse control efficacy (%)
CK1	0 ± 0c	0 ± 0c	\
CK2	50.9 ± 3.0a	21.8 ± 3.6a	\
SX	37.1 ± 3.4b	11.1 ± 1.0b	49.1

CK1: only sterile distilled water applied to leaves, CK2: leaves only inoculated with C. gloeosporioides, SX: strain XW2 and C. gloeosporioides applied to leaves at the same time. The investigations were carried out 12 days after the treatments, respectively. The diseased leaves rate (DLR), disease index (DI), and greenhouse control efficacy (GCE) was calculated using the following formulae: DLR (%) = 100 × (No. of affected leaves/No. of total leaves), DI = [100 × ∑ (No. of affected leaves × corresponding DS)]/(No. of total leaves × 5), GCE (%) = 100 × [(DI of CK2 - DI of CK1)-(DI of SX treatment- DI of CK1)]/(DI of CK2-DI of CK1) Values with the different letter within the same column are significantly different at P < 0.05 according to Duncan’s test. Numbers follow by the “±” are standard errors (SE). \: the data is incalculable

ISSN: 1869-2044