000			02873nam a22004337a 4500
001			G66251
003			MX-TxCIM
005			20211006075457.0
008			121211s ||||f| 0 p|p||0|| |
020			_a970-648-001-3
040			_aMX-TxCIM
072		0	_aH20
082	0	4	_a633.1194 _bDUV
100	1		_aShrestha, K.K. _uHelminthosporium Blights of Wheat: Spot Blotch and Tan Spot. Proceedings of an International Workshop; El Batan, Texcoco (Mexico); 9 - 14 Feb 1997
110	2		_aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
245	0	0	_aDisease incidence and yield loss due to foliar blight of wheat in Nepal
260			_aMexico, DF (Mexico) _bCIMMYT|UCL|BADC : _c1998
340			_aPrinted
520			_aHelminthosporium leaf blight (HLB, tan spot) is a serious disease of wheat in Nepal, caused individually or in combination by Bipolaris sorokiniana (Sacc.) Shoem. and Pyrenophora tritici-repentis (Died.) Shoem. In recent years, the magnitude and severity of HLB have extended from the terai region (100 masl) to the hilly region (2400 masl). Since 1990, B. sorokiniana has been the predominant pathogen of the leaf blight syndrome. Incidence of seed infection was higher in samples from eastern terai than western terai and the hills. The relationship between seed infection and germination was significant and negatively correlated. Most of the improved and recommended wheat varieties are severely infected by the disease; however, varieties including NL 644, NL 623, BL 1413, Nepal 297, NL 625, NL 591, and Triveni showed moderate HLB resistance and BL 1420 was observed to be resistant. Eighty-six entries, resistant/tolerant to HLB, were selected from multilocation trials, and could be used as potential sources of resistance. Yield losses as high as 23.8% were recorded. Poor germination was experienced due to high B. sorokiniana infection levels in grain harvested during 1996. This problem was solved by treating the seed with Vitavax-200 before distribution to farmers. Disease management has been practiced in Nepal for the last few years. Incidence of HLB was significantly reduced by two irrigation cycles and three applications of propiconazole as a foliar spray at 0.5 L ha-1.
546			_aEnglish
591			_a9806|AGRIS 9802
593			_aJose Juan Caballero
595			_aCPC
650	1	0	_aBipolaris
650	1	0	_aBlights
650	1	0	_aDisease control
650	1	7	_aDisease resistance _gAGROVOC _2 _91077
650	1	0	_aHelminthosporium
650	1	0	_aNepal
650	1	7	_aPlant diseases _gAGROVOC _2 _91206
650	1	0	_aYield factors
653	0		_aCIMMYT
650	1	7	_aTriticum _gAGROVOC _2 _91295
700	1		_aBimb, H.P., _ecoaut.
700	1		_aDuveiller, E.|Dubin, H.J.|Reeves, J.|McNab, A. _eeds.
700	1		_aMahto, B.N., _ecoaut.
700	1		_aTimila, R.D., _ecoaut.
942			_cPRO
999			_c3805 _d3805