000			02688nab a22003257a 4500
999			_c61936 _d61928
001			61936
003			MX-TxCIM
005			20211006073555.0
008			180103s2011 xxk|||p|op||| 00| 0 eng d
022			_a0032-0862
022			_a1365-3059 (Online)
024	8		_ahttps://doi.org/10.1111/j.1365-3059.2011.02472.x
040			_aMX-TxCIM
041			_aeng
100	1		_913418 _aCapucho, A.S.
245	1	0	_aDevelopment and validation of a standard area diagram set to estimate severity of leaf rust in Coffea arabica and C . canephora
260			_aOxford (United Kingdom) : _bWiley, _c2011.
500			_aPeer review
520			_aA standard area diagram (SAD) set to aid assessment of the severity of coffee leaf rust (Hemileia vastatrix ) was prepared and validated, and the characteristics of the rust lesions on Coffea arabica and C. canephora leaves were compared. The results indicated that the lesions were similar, so one scale could be used to evaluate the severity of rust on both species. The proposed SAD set contains illustrations of leaves with six disease severities (2·5, 5, 10, 20, 40 and 80%). The SAD set was validated by 10 raters with no previous experience of disease evaluation. The severity of rust was first estimated without using the SADs, and the same raters assessed the leaves again using the SADs. Regression analysis and Lin’s concordance correlation (ρ c ) analysis of estimated against actual disease severity showed precision and accuracy was significantly better using the SADs, for most raters, with improvements in both the slope and intercept of the regressions, and the values of u , υ (components of accuracy and precision of the ρ c ) and ρ c improved to 60, 70 and 90% of raters, respectively, when the SADs were used. The absolute error was ≤38% without the SADs, and ≤22% with them. Severity estimates were more reliable using the SADs (R 2 = 0·70–1·00 unaided, and R 2 = 0·80–1·00 using the SADs). The SAD set improved rater assessments for the estimation of arabica and conilon rust severity, and can be used for assessing rust severity for many purposes, including plant breeding, fungicide screening and pathotype characterization.
546			_aText in English
650		7	_911096 _aCoffea arabica _2AGROVOC
650		7	_913419 _aCoffea canephora _2AGROVOC
650		7	_aPlant diseases _gAGROVOC _2 _91206
650		7	_913420 _aHemileia vastatrix _2AGROVOC
700	1		_913421 _aZambolim, L.
700	1		_913422 _aDuarte, H.S.S.
700	1		_913423 _aVaz, G.R.O.
773	0		_gv. 60, no. 6, p. 1144-1150 _tPlant Pathology _x1365-3059 _dOxford (United Kingdom) : Wiley, 2011. _w444692
942			_2ddc _cJA _n0