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Copyright of Revista Mexicana de Ciencias Agrícolas is the property of Instituto Nacional de Investigaciones Forestales, Agricolas y Pecuarias and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The genus Fusarium is a pathogen associated with chili wilt and reduced crop yield. Rhizobacterias are an alternative to improve agricultural production and protection against plant pathogens. In this work the in vitro antagonism of ten Bacillus strains against Fusarium solani ITCF1 and F. equiseti ITCF2 were evaluated. Our results showed that all the bacterial strains inhibited mycelial growth between 21.28 and 71.70%, additionally the CBMT2 and CBMT51 strains showed inhibition halos against F. equiseti with halos of 3.76 and 6.37 mm. The two pathogens showed 100% incidence of disease in seedlings habanero chili and severity of 90.0% by F. solani and 77.5% by F. equiseti. In resistance tests wilt four strains of Bacillus based on the antagonistic activity were used, three inoculations were made in base of stem 15, 28 and 35 days after germination, we found that B. subtilis CBMT51and B. cereus BL18 reduced the severity disease caused by F. equiseti and BL18 strain for F. solani, in 47.7, 37.8 and 50.9% respectively at 28 days of evaluation. [ABSTRACT FROM AUTHOR]

Copyright of Agrociencia is the property of Colegio de Postgraduados and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

One of the phytosanitary problems in the cultivation of pepper is the whitefly, begomovirus transmitter. Given the need for alternatives, the objective was to evaluate graft tolerance of Capsicum chinense-Capsicum annuum var. glabriusculum to begomovirus under field conditions. Two creole materials were used for rootstock (amashito and muela) and habanero pepper as graft (criollo and jaguar). The "terminal plectrum" graft was used and six treatments were generated. The whitefly populations, the incidence and severity of the disease were recorded every 10 days, with the latter AUDPC were calculated and apparent infection rate Yfinal. In the production stage, yield, length and diameter of fruits it was determined. At 130 days after transplantation, the population under whitefly, it was quantified in the grafted treatments (muela + habanero jaguar, amashito + habanero jaguar, muela + habanero criollo y amashito + habanero criollo) that ranged from 5.5 to 14.5 insects per plant. The increased incidence and severity of virus was average in habanero jaguar with 100 and 62%. The lowest AUDPC, apparent infection rate and Yfinal were estimated in muela + habanero criollo with 746.6 (% per day), 0.0050 (% per day) and 23.4%, in their order; associated with the genetic strength of the rootstock. The grafts amashito + habanero jaguar, amashito + habanero criollo y muela + habanero criollo showed better agronomic performance and productivity of the crop. [ABSTRACT FROM AUTHOR]