000			02990nam a22003377a 4500
001			G93073
003			MX-TxCIM
005			20220705220539.0
008			121211s ||||f| 0 p|p||0|| |
020			_a978-0-8138-2024-8
040			_aMX-TxCIM
041			_aeng
090			_aCIS-5540
100	1		_aSmiley, R.W. _93138
245	1	0	_aChapter 8. Nematodes which challenge global wheat production
260			_aIowa, IA (USA) : _bWiley-Blackwell, _c2009.
300			_a18 pages
490			_aWorld Agriculture Series
520			_a1) Effects of cereal cyst (Heterodera) and rootlesion (Pratylenchus) nematodes on wheat are difficult to identify and control. Symptoms are non-specific and easily confused with stress from nutrient deficiency, drought, or disease. 2) Multiple species of Heterodera and Pratylenchus are capable of damaging wheat. Identification of species is difficult and procedures based on comparative morphology can be unreliable. Identification of species is now assisted by molecular tools. 3) Heterodera species discussed in this chapter reproduce only on hosts within the Poaceae, and individual species are highly heterogeneous for virulence to specific host genotypes. Many pathotypes occur within H. avenae, and the same is anticipated for H. filipjevi and H. latipons. No pathotypic variation within either P. neglectus or P. thornei has been reported on wheat, but both species multiply in a wide range of monocot and dicot hosts. Mixtures of Heterodera species or pathotypes, and Pratylenchus species, may occur within individual fields. 4) Field sanitation is important because these nematodes multiply on many weed species and volunteer cereals. Cereal cyst nematode can be controlled by rotating w\heat with a noncereal, a resistant cultivar, or with weed-free fallow. Root-lesion nematode is best managed by rotating resistant and tolerant wheat cultivars with other poor hosts. 5) Resistance and tolerance are genetically independent, and cultivars resistant or tolerant to one species are not necessarily resistant or tolerant to another species. Root-lesion nematode resistance is quantitative and cereal cyst nematode is controlled by single-gene resistance. Molecular markers have been developed to identify genes and quantitative trait loci for resistance in seedlings. 6) Molecular tests to identify and quantify nematodes in commercial soil testing laboratories will allow more effective surveys of populations. Greater collaboration is needed between research institutions, organizations, and countries.
536			_aGlobal Wheat Program
546			_aText in English
594			_aINT2410
595			_aCSC
650		7	_2AGROVOC _91797 _aNematoda
650		7	_2AGROVOC _91310 _aWheat
650		7	_2AGROVOC _91796 _aHeterodera
650		7	_2AGROVOC _92112 _aPratylenchus
700	1		_aNicol, J.M., _9228
773			_dIowa, IA (USA) : Wiley-Blackwell, 2009. _gp. 171-188 _tWheat : science and trade _wG93071 _z978-0-8138-2024-8
942			_cBP _2ddc
999			_c7698 _d7698