Nematophagus fungi Arthrobotrys spp., against Meloidogyne incognita under in vitro conditions
DOI:
https://doi.org/10.59741/agraria.v14i1.529Keywords:
Plant parasitic nematodes, biologic control, OrbiliaceaeAbstract
The root-knot nematode Meloidogyne incognita, is reported as the main nematode that causes severe damage to agriculture around the world. Nematophagous fungi such as Arthrobotrys spp are natural enemies of nematodes, which can immobilize and digest. In order to reduce the use of chemical nematicides, it aims to generate new technologies for biological control of Meloidogyne incognita, from the use of control agents such as fungi of the genus Arthrobotrys spp. The aim of this study was to identify species of the fungus genus Arthrobotrys with nematophagous activity against Meloidogyne incognita, in different agricultural regions of Mexico. This research was conducted during 2014. 150 samples of agricultural soils from a depth of 0-15 cm based on its own to obtain fungi and nematodes were processed methodologies. The fungi were identified using microscopy techniques and taxonomic keys, finding five different strains of nematophagous fungi, Arthrobotrys musiformis (HN01), Drechslerella yunnanensis (HN02), Arthrobotrys oligospora (HN03), Artrobotrys spp., (HN04), Artrobotrys musiformis. (HN05). Nematophagous bioassays activity of each identified species of the genus Arthobotrys against Meloidogyne incognita under in vitro conditions were performed. These were conducted in Petri dish 5 cm diameter, containing second stage juveniles of Meloidogyne incognita, adding concentrated cell 1x105, 1x106 and 1x107 for a period of 168h. A completely random design was established factorial arrangement with 15 treatments with 5 more reps an additional witness, the data obtained were analyzed by R. The percent mortality was evaluated by performing an analysis of variance between treatments and TL50 average by probit analysis. The nematophagous capacity was 94% HN01 TL50 106.07h; 146.53h TL50 59% HN02; 118.24h TL50 87% HN03; 136.98h TL50 69% HN04; 131.88h TL50 72% HN05.
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