Open AccessUse of botanical extracts, cassava wastewater and nematicide for the control of root-knot nematode on carrot
Author(s) -
Edson Luiz Lopes Baldin,
Sílvia Renata Siciliano Wilcken,
Luiz Eduardo da Rocha Pannuti,
Eunice Cláudia Schlick-Souza,
Fábio P. Vanzei
Publication year - 2012
Publication title -
summa phytopathologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.271
H-Index - 14
eISSN - 1980-5454
pISSN - 0100-5405
DOI - 10.1590/s0100-54052012000100006
Subject(s) - biology , azadirachta , shoot , meloidogyne incognita , horticulture , crotalaria juncea , root knot nematode , sowing , dry weight , terra incognita , agronomy , nematode , green manure , ecology
Aqueous extracts of several plant species have shown promising in controlling root-knot nematode, Meloidogyne incognita (Kofoid & White), one of the most limiting agents for carrot cultivation. The current study evaluated the effect of aqueous extracts from seven botanical species applied to 40, 50, 60, 70 and 80 days after sowing 'Nantes' carrots in soil infested with root-knot nematode. Three other treatments included cassava wastewater, distilled water (control), which were applied in the same periods of the extracts application, in addition to carbofuran 50G (80Kg/ha), which was applied once at 60 days after carrot sowing. Evaluations were performed at 90 days after inoculation to determine shoot and root fresh weight, as well as the diameter and the length of principal roots and the number of galls on primary and secondary roots. Plants treated with cassava wastewater, extracts of Ricinus communis L. seeds, Crotalaria juncea L. seeds, R. communis leaves + branches + fruits, Chenopodium ambrosioides L. leaves + branches + inflorescences and Azadirachta indica A. Juss. seeds showed the highest rates of total weight (root + shoot) and shoot weight. The extract of R. communis leaves + branches + fruits provides the highest total root weight and principal root diameter. Cassava wastewater and extracts of R. communis seeds provided the highest principal root weight. The extract of R. communis seeds and cassava wastewater can be considered promising for the alternative control of M. incognita