000 02441nam a22004217a 4500
001 G64908
003 MX-TxCIM
005 20211006080034.0
008 121211s ||||f| 0 p|p||0|| |
020 _a968-6923-79-9
040 _aMX-TxCIM
072 0 _aF30
072 0 _aH10
082 0 4 _a633.153
_bMIH
100 1 _aViana, P.A.
_uInsect Resistant Maize: Recent Advances and Utilization. Proceedings of an International Symposium; Mexico, DF (Mexico); 27 Nov - 3 Dec 1994
110 2 _aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
245 0 0 _aMaize resistance to the lesser cornstalk borer and fall armyworm in Brazil
260 _aMexico, DF (Mexico)
_bCIMMYT :
_c1997
340 _aPrinted
520 _aMaize, Zea mays, is an important cereal crop in Brazil. It is extensively grown throughout the country for food grain, feed, and fodder purposes. Among many factors, insects pests play a major role in limiting maize yields. The lesser cornstalk borer (LCB) and the fall armyworm (FAW) have been considered the most important field pests, being key pests in many of the areas where the crop is grown. The FAW and the LCB have been reared at EMBRAPA/CNPMS to undertake artificial infestation for large-scale studies, including screening for resistance. Several genetic materials were selected for resistance. Sources of resistance such as CMS 23 and CMS 24 to FAW, CMS 15 and CMS 454 to LCB are being used in breeding for resistance. The resistance mechanisms to FAW were studied on four selected maize genotypes. Larvae reared on CMS 14C required longer to develop to the pupal and adult stages and had reduced larval and pupal weights. The genotype Zapalote Chico had fewer larvae feeding on leaf sections than other genotypes tested. The analysis of a diallel cross indicated that gene action conditioning resistance to the FAW appears to be due to additive and non-additive effects.
546 _aEnglish
591 _a9711|AGRIS 9702
593 _aJose Juan Caballero
595 _aCPC
650 1 0 _aBrazil
650 1 0 _aInfestation
650 1 0 _aLarvae
650 1 0 _aPest control
650 1 0 _aPest insects
650 1 7 _aPest resistance
_gAGROVOC
_2
_91199
650 1 0 _aSelection
653 0 _aCIMMYT
650 1 0 _91314
_aZea mays
_gAGROVOC
650 1 0 _91134
_aGenotypes
_gAGROVOC
700 1 _aGuimaraes, P.E.O.,
_ecoaut.
700 1 _aMihm, J.A.
_eed.
942 _cPRO
999 _c3587
_d3587