IMBIV   05474
INSTITUTO MULTIDISCIPLINARIO DE BIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
Selected soil-borne fungi under glyphosate application and crop residues from a long-term field experiment.
Autor/es:
MERILES, J. M.; VARGAS GIL, S.; HARO, R. J.; MARCH, G. J.; GUZMÁN, C. A.
Revista:
BIOLOGICAL AGRICULTURE & HORTICULTURE
Referencias:
Año: 2008 vol. 26 p. 193 - 205
ISSN:
0144-8765
Resumen:
A study was carried out to determine the short-term effects of glyphosate and crop residues
on the population dynamics of soil-borne fungi under field conditions. Field experiments were
conducted during two growing seasons. The assays were done in plots that were subjected to a
peanut (Arachis hypogaea)-corn (Zea mays)-soyabean (Glycine max) rotation system with two
sequences: corn-soyabean-peanut and soyabean-corn-peanut. Soil samples were randomly collected
from a peanut-corn-soyabean rotation field located at Córdoba province (Argentina) in order to
quantify native populations of Fusarium, Pythium, Trichoderma, Gliocladium and culturable total
fungi populations. Independently of the present crop, the highest population of TrichodermaArachis hypogaea)-corn (Zea mays)-soyabean (Glycine max) rotation system with two
sequences: corn-soyabean-peanut and soyabean-corn-peanut. Soil samples were randomly collected
from a peanut-corn-soyabean rotation field located at Córdoba province (Argentina) in order to
quantify native populations of Fusarium, Pythium, Trichoderma, Gliocladium and culturable total
fungi populations. Independently of the present crop, the highest population of TrichodermaFusarium, Pythium, Trichoderma, Gliocladium and culturable total
fungi populations. Independently of the present crop, the highest population of TrichodermaTrichoderma
and Gliocladium were recorded in soil with corn residue. Pythium populations increased after
glyphosate treatment. Trichoderma, Gliocladium and culturable total fungi populations were not
affected by glyphosate applications. Information on the actual time and duration of population
responses of various important soil-borne fungi after glyphosate treatment is currently limited
since it is dependent on numerous parameters such as soil condition, type of hosts involved
and soil microbial interactions. The use of corn residue appeared as an interesting alternative to
increase the population of potential antagonistre fungi, and reduce crop diseases; therefore more
field research along this line is clearly needed.Gliocladium were recorded in soil with corn residue. Pythium populations increased after
glyphosate treatment. Trichoderma, Gliocladium and culturable total fungi populations were not
affected by glyphosate applications. Information on the actual time and duration of population
responses of various important soil-borne fungi after glyphosate treatment is currently limited
since it is dependent on numerous parameters such as soil condition, type of hosts involved
and soil microbial interactions. The use of corn residue appeared as an interesting alternative to
increase the population of potential antagonistre fungi, and reduce crop diseases; therefore more
field research along this line is clearly needed.Trichoderma, Gliocladium and culturable total fungi populations were not
affected by glyphosate applications. Information on the actual time and duration of population
responses of various important soil-borne fungi after glyphosate treatment is currently limited
since it is dependent on numerous parameters such as soil condition, type of hosts involved
and soil microbial interactions. The use of corn residue appeared as an interesting alternative to
increase the population of potential antagonistre fungi, and reduce crop diseases; therefore more
field research along this line is clearly needed.