000 03357nam a22005537a 4500
001 80122
003 MX-TxCIM
005 20190726175602.0
008 121211s ||||f| 0 p|p||0|| |
020 _a970-648-120-6
040 _aMX-TxCIM
072 0 _aE16
072 0 _aH10
090 _aCIS-4188
110 0 _aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT) Kenya
100 1 _9841
_aDe Groote, H.
_gSocioeconomics Program
_8INT2512
245 0 0 _aDirect estimation of maize crop losses due to stem borers in Kenya, preliminary results from 2000 and 2001
260 _aNairobi (Kenya)
_bKARI|CIMMYT :
_c2002
300 _ap. 401-406
340 _aPrinted
520 _aMaize is the major food crop in Kenya, where 2.4 million tons are produced yearly for 28.6 million people (85 kg/person). Population is growing rapidly (2.9%/year) and the increased population pressure on the land has resulted in increased pest pressure on crops. Stem borer is one of the most important pests of maize. Previous research with artificial infestation established clear links between incidence or damage factors and yield losses These results cannot be extrapolated to estimate crop losses under natural infestation, although it is precisely those estimates that are needed in order to estimate impact and to set research and extension priorities. Therefore, to estimate the potential impact of the Insect Resistant Maize for Africa (IRMA) project, a representative sample of maize fields was selected during 1999 and 2000 for each of Kenya's 5 major agro-ecological zones. Half of each field was protected against stem borers using a systemic insecticide, and the other half was left for natural infestation, and the comparison of yields gives an estimate of crop loss. Total loss in Kenya due to stem borers is thus estimated at 13.5 % (valued at between US$25 and US$ 59.8 million), ranging from 11% in the highlands to 21.% in the dry areas. More than half of the losses occur in the moist transitional zone. This area also has a high adoption rate of improved varieties (95%) making this area a promising target for insect resistant varieties. In the dry areas, losses are relatively high (21%), but its low yields reduce potential benefits but those benefits would go to more resource-poor farmers.
536 _aSocioeconomics Program
546 _aEnglish
591 _a0409|AGRIS 0401|AL-Maize Program
593 _aJuan Carlos Mendieta
594 _aINT2512
595 _aCSC
650 1 0 _aCrop losses
_91060
650 1 0 _aEconomic analysis
_91088
650 1 0 _aEconomic resources
650 1 0 _aFood crops
_91994
650 1 0 _aInfestation
650 1 0 _ainsect resistance
650 1 0 _aKenya
_91167
650 1 0 _aMaize
_91173
650 1 0 _aPest control
650 1 0 _aSeed production
_91253
650 1 0 _aStem borer
650 1 0 _aYield factors
653 0 _aCIMMYT
653 0 _aKARI
700 1 _aBett, Ch.,
_ecoaut.
700 1 _aFriesen, D.K.|Palmer, A.F.E.
700 1 _aMose. L.,
_ecoaut.
700 1 _9627
_aOdendo, M.
700 1 _aOkuro, J.O.,
_ecoaut.
_9239
700 1 _aWekesa, E.,
_ecoaut.
942 _cPRO
999 _c7344
_d7344