Fertilizantes orgânicos na ação de Pratylenchus brachyurus em soja

Abstract

Phytonematodes can significantly limite the soybean yield. Due to inadequate soil management and the fact that there is not efficient nematicide in the market. The, P. brachyurus known as the nematode root lesions, has been spreading rapidly and increased its importance in the Brazil fields. The aim of this study was to evaluate the effect of organic fertilizers in soil and liquid form in control of the nematode in soybean roots, on Fepagro 36RR.The design was a randomized block design with six treatments and nine replicates. There treatments were evaluated with fertilizers in solid and liquid form: soil+ vermicompost manure (VERM), soil+ compost (manure and straw, COMP), soil +organic compound Ecocitrus (ECO) and two control without fertilization, with the presence or absence of the nematode. Samples were collected at 25, 50 and 75 days after inoculation of phytonematode, evaluating height, fresh shoot and root mass the juvenils number of P. brachyurus in the roots. The results show that after 50 days, the treatments applied in solid form were suppressive to control P. brachyurus and development of soybean plants. 75 days, it is observed that plants grown with VERM were less affected, with the number of nematodes penetrated 13% and 26% lower than that observed in the ECO and COMP fertilizer. New tests should be conducted using compost of cattle manure, vermicompost and commercial waste to confirm the potencial of organic fertilizer in control P. brachyurus in soybean field.