000			03430nab a22004457a 4500
001			G96594
003			MX-TxCIM
005			20230609170508.0
008			210614s2012 ne |||p|op||| 00| 0 eng d
022			_a0378-4290
024	8		_ahttps://doi.org/10.1016/j.fcr.2012.03.015
040			_aMX-TxCIM
090			_aCIS-6694
100	1		_aJamil, M. _920272
245	1	0	_aStriga hermonthica parasitism in maize in response to N and P fertilisers
260			_aAmsterdam (Netherlands) : _bElsevier, _c2012.
500			_aPeer review
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0378-4290
520			_aParasitism by the parasitic weed, Striga hermonthica (Striga), constitutes a major biological constraint to maize production in sub-Sahara Africa. Nutrient deficiency is known to aggravate Striga infestation and in a number of plant species it was recently shown that this may be due to increased secretion of Striga germination stimulants into the soil. The present study was designed to observe the connection between soil fertility, secretion of germination stimulants and Striga infection in maize under greenhouse and field conditions. The experiments were conducted during two successive cropping seasons (2008 and 2009). The greenhouse study showed that maize secretes a number of so far unidentified strigolactones that induce Striga seed germination and the amount of these strigolactones increases upon N and P deficiency. The increased secretion of germination stimulants under N and P deficiency resulted in increased Striga infection in pot experiments. The on-station and on-farm field trials in Western Kenya also showed reduction in Striga infestation with the application of mineral nutrients but the results were less consistent than in the greenhouse. Increasing levels of N showed a fair reduction of Striga in the field especially during the first year, whereas P application did not have much effect in contrast to the greenhouse study where both N and P clearly reduced Striga infection. The likely explanation for this discrepancy is that availability of mineral nutrients under field conditions is less predictable than under greenhouse conditions, due to a number of factors such as soil texture and structure, pH, salinity, drought, leaching and runoff. Hence, further studies are needed on the importance of these factors before a fertiliser application strategy can be formulated to improve control of Striga in maize in the field.
536			_aConservation Agriculture Program
546			_aText in English
591			_aCIMMYT Informa No. 1794|Elsevier
594			_aINT2340
595			_aCSC
650		7	_930974 _aLactones _2AGROVOC
650		7	_91279 _aStriga _2AGROVOC
650		7	_92912 _aNitrogen _2AGROVOC
650		7	_95314 _aPhosphorus _2AGROVOC
650		7	_91314 _aZea mays _2AGROVOC
650		7	_91195 _aParasitic plants _2AGROVOC
651		7	_2AGROVOC _93783 _aKenya
651		7	_2AGROVOC _91950 _aAfrica South of Sahara
700	1		_aKanampiu, F. _9546
700	1		_aKaraya, H. _9150
700	1		_aCharnikhova, T. _920273
700	1		_aBouwmeester, H.J. _920274
773	0		_tField Crops Research _gv. 134, p. 1-10 _dAmsterdam (Netherlands) : Elsevier, 2012. _wG444314 _x0378-4290
856	4		_uhttps://hdl.handle.net/20.500.12665/516 _yAccess only for CIMMYT Staff
942			_cJA _2ddc _n0
999			_c29161 _d29161