000			02777nam a22004457a 4500
001			G81239
003			MX-TxCIM
005			20211006084759.0
008			121211s ||||f| 0 p|p||0|| |
020			_a970-648-116-8
040			_aMX-TxCIM
072		0	_aF01
072		0	_aH20
090			_aLook under series title
100	1		_aRathore, R.S. _uAsian Regional Maize Workshop, 8: New Technologies for the New Millennium
110	0		_aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico, DF (Mexico)
111	2		_aProceedings of the Asian Regional Maize Workshop _cBangkok (Thailand) _d5-8 Aug 2002
245	0	0	_aRajasthan downy mildew of maize: _b the problem and management perspectives
260			_aMexico, DF (Mexico) _bCIMMYT : _c2004
300			_ap. 366-379
340			_aPrinted
520			_aRajasthan downy mildew of maize incited by Peronosclerospora heteropogoni is a unique example of ontogenic predisposition of a crop to a pathogen from wild grass host. Since its first record on maize in 1968, several outbreaks have been reported during 1973-80 and losses of up to 60 per cent have been recorded. The pathogen can infect maize, teosinte, Heteropogon melanocarpus, and H. contortus. The latter seems to be the natural reservoir of the pathogen. Some extent of variability has been observed among populations of P. heteropogoni. Young maize seedlings, 3-4 days after germination, are most susceptible to RDM. The mycelium has been observed in seeds collected from systemically infected plants, but the studies on seed transmission suggest that seed transmission may not be of much significance. The most conducive condition for disease development are temperatures 22.9 to 28.6° C and RH > 85.0 per cent. Management strategies for RDM include early sowing with onset of monsoon to avoid inoculum from P. heteropogoni, use of systemic fungicide metalaxyl as seed treatment @ 4 g/kg or spray 0.1 per cent, and use of host plant resistance. Future research thrusts on pathogenic variability, search for other collateral hosts, inheritance of resistance, use of genotype mixture in hot spot areas, and evaluation of botanicals for eco-friendly management of RDM are suggested.
546			_aEnglish
591			_a0502|AGRIS 0501|AL-Maize Program
593			_aJuan Carlos Mendieta
595			_aCPC
650	1	0	_aFungicides
650	1	0	_aHeteropogon
650	1	7	_aMaize _gAGROVOC _2 _91173
650	1	0	_aMildews
650	1	0	_aPeronosclerospora
650	1	0	_aRajasthan
650	1	0	_aSeedlings
650	1	0	_91801 _aSowing _gAGROVOC
653	0		_aCIMMYT
700	1		_aMathur, K., _ecoaut.
700	1		_aSrinivasan, G.|Zaidi, P.H.|Prasanna, B.M.|Gonzalez, F.|Lesnick, K. _eeds.
700	1		_aTrivedi, A., _ecoaut.
942			_cPRO
999			_c7474 _d7474