Compost amendments in a wood-chip + polyacrylamide medium decreased Verticillium dahliae infection on potato

Enmiendas de abono en un medio de trozos de madera + polyacrilamido aminoro la infección de Verticillium dahliae en papa

Entry, J.A. and Strausbaugh, C.A. and Sojka, R.E. (2004) Compost amendments in a wood-chip + polyacrylamide medium decreased Verticillium dahliae infection on potato. pp. 19-24. In: Ellsworth, J.W. (ed.) Proc. Idaho Nutrient Management Conference. USA-ID-Twin Falls, 2004/03/11.

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Abstract

If the soil around the plant roots could be altered to favor the non-pathogenic indigenous soil
microorganisms overrelative to the plant pathogens, the survival and proliferation of indigenous
soil microorganisms, and thus effectiveness of biological control, may be increased. We used
wood- chip+-polyacrylamide (PAM) cores to alter the soil environment in a greenhouse study to
favor indigenous soil microorganisms in vegetable and manure compost to reduce Verticillium
dahliae infection of potato (Solanum tuberosum L.) plants. Potato plants growing in soils
amended with vegetable compost-wood chip-PAM cores had significantly less disease because of
86 % lower visible (Vvis ) and 66 % lower isolation (Viso ) V. dahliae infection rateings than
control soils and soils with dairy or vegetable compost alone. Soils with wood chip-PAM cores
and soils with wood chip-PAM-vegetable compost had greater 2.5 times greater microbial
biomass/Verticillium dahliae biomass (MBNB) ratios in soil than control soils or in soils
amended with compost alone. MBNB ratios in wood chip-PAM cores and wood chip-PAM-vegetable
compost were 2.5 to 3.2 times greater than in wood chip-PAM-dairy compost cores. Vvis
correlated in a quadratic relationship with the MBNB ratio (r 2=0.76) indicating that as microbial
biomass increased, V. dahliae biomass and symptoms decreased. As MBNB ratio increased,
Vvis decreased.

Item Type:	Conference or Workshop Item (Paper)
NWISRL Publication Number:	1133
Subjects:	Soil > Amendments Irrigated crops > Potato Polyacrylamide (PAM) > Water-soluble PAM (WSPAM)
Depositing User:	Users 3 not found.
Date Deposited:	24 Mar 2008 21:04
Last Modified:	03 Nov 2016 16:15
Item ID:	927
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/927