000			03143nam a22004937a 4500
001			G80337
003			MX-TxCIM
005			20240919021105.0
008			121211s ||||f| 0 p|p||0|| |
020			_a970-648-120-6
040			_aMX-TxCIM
072		0	_aF01
072		0	_aH10
082	0	4	_a338.16 _bFRI
100	1		_aAjala, S.O. _uIntegrated Approaches to Higher Maize Productivity in the New Millennium
110	0		_aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT) Kenya
111	2		_a7. Proceedings of the Eastern and Southern Africa Regional Maize Conference _cNairobi (Kenya) _d5-11 Feb 2002
245	0	0	_aProgress in breeding for resistance to maize stem borers Sesamia calamistis and Eldana sacharina in West and Central Africa
260			_aNairobi (Kenya) _bKARI|CIMMYT : _c2002
300			_ap. 49-54
340			_aPrinted
520			_aThe pillk stem borer (Sesamia calamistis Walker (Pyralidae)) and the sugarcane borer (Eldana saccharina Hampson (Noctuidae)) are among the most damaging pests of maize in West and Central Africa, a region where IITA invests considerahle effort in improving productivity of maize-based systems. The use of host plant resistance (HPR) is central to any Integrated Pest Management (IPM) programme; therefore, development and use of maize varieties with resistance to Sesamia and/or eldana are integral to IPM activities in the region. Early research efforts resulted in the establishment of mass rearing facilities and screening procedures for both insect species, and the development of maize genotypes with resistance to Sesamia and/or Eldana. S1 selection has been used successfully to improve levels of resistance. New genotypes with resistance to both borer species have been developed by either broadening the genetic base of existing genotypes or by classifying the developed genotypes into heterotic groups and pooling each group to form a reciprocal pool for further improvement. Artificial infestation has identified levels of cross resistance in a number of genotypes. Inbred lines with resistance to either of the borer species have been isolated and tested. Stem borer resistant varieties are currently being grown on-farm in Nigeria, Ghana and Cameroon. There is, however, the need to correctly classify the mechanism of resistance in the identified genotypes to improve efficiency of selection and to combine different mechanisms of resistance into different genotypes.
546			_aEnglish
591			_a0409|AGRIS 0401|AL-Maize Program
593			_aJuan Carlos Mendieta
595			_aCPC
650	1	0	_aAfrica
650	1	0	_aEldana saccharina
650	1	7	_aMaize _gAGROVOC _2 _91173
650	1	0	_aPest control
650	1	0	_aResistance to chemicals
650	1	0	_aSesamia calamistis
650	1	0	_aStem borer
653	0		_aCIMMYT
653	0		_aKARI
650	1	0	_91134 _aGenotypes _gAGROVOC
650	1	7	_aPlant breeding _gAGROVOC _2 _91203
700	1		_aCardwell, K., _ecoaut.
700	1		_aFriesen, D.K.|Palmer, A.F.E.
700	1		_aKling, J.G., _ecoaut.
700	1		_aOdiyi, A., _ecoaut.
700	1		_aSchulthess, F., _ecoaut.
942			_cBK
999			_c7350 _d7350