Journal of Food, Agriculture and Environment

Effect of sewage sludge on populations of Meloidogyne incognita and Pratylenchus brachyurus in maize

Author(s):

Lais F. Fontana ¹, Claudia R. Dias-Arieira ¹*, Patrícia M. Marini ¹, Tais S. Dadazio ¹, Yara C. Fabrin Cabral ¹, Tiago Roque B. Silva ¹, Regina C. Ferreira Ribeiro ²

Recieved Date: 2012-07-18, Accepted Date: 2012-09-29

Abstract:

The aim of this study was to evaluate the effect of sewage sludge on populations of Pratylenchus brachyurus and Meloidogyne incognita in maize. For this, maize seedlings were transplanted into 2 litre pots and inoculated with 2000 specimens of P. brachyurus or 4000 M. incognita eggs. After 90 days, the shoots and leaves were discarded and the plant root system was mixed into the soil. Each pot was treated with sewage sludge at rates of 0, 20, 50, 100, 200 and 500 g, which was mixed into the soil surface. After three days, maize seedlings were transplanted into the pots and, after 70 days, the plants were collected for analysis and measured for plant height, fresh and dry weight of shoots and leaves, and number of nematodes per root system. An aliquot of 100 cm³ of soil was collected to estimate the number of P. brachyurus. The experiment was repeated in two different periods. It was carried out completely randomly and repeated eight and six times, in different studies. Averages obtained were submitted to regression analysis and compared using the Tukey’s test at 5% probability. In one of the experiments, the number of P. brachyurus was reduced when 20 g of sewage sludge was applied to the soil and treatment was increased to 200 g. The sewage sludge did not reduce populations of M. incognita. The increase in vegetative parameters was directly proportional to the increase in the dosage of sludge applied to the soil. 

Keywords:

Control, lesion nematode, organic matter, root-knot nematode, sewage sludge

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Journal: Journal of Food, Agriculture and Environment
Year: 2012
Volume: 10
Issue: 3&4
Category: Agriculture
Pages: 534-536

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