Articles
Profitability of soil disinfestation methods against the Root-knot nematodes in Mediterranean intensive strawberry crops
Article number
1410_15
Pages
103 – 108
Language
English
Abstract
Losses caused by phytoparasitic nematodes are directly proportional to their soil densities at the beginning of a crop, so the primary objective of nematological control is to reduce their populations prior to planting.
Effectiveness of agrochemicals, botanicals, and biosolarization in reducing root-knot nematode (RKN) populations in strawberry fields was calculated in multiple field trials.
After fumigation with 1.3-dichloropropene+chloropicrin or dimethyl-disulphide, soil nematode populations were reduced by 78-87%. Other agrochemical nematicides showed efficacies ranging from 51 to 64%, whereas botanicals reduced nematode populations by 41-48%. The combination of solarization with organic amendments (biosolarization) reduced soil nematode populations by 73%. A cost-benefit analysis of soil disinfestation methods for the pathosystem strawberry-M. hapla was conducted.
Nematicidal treatments with costs exceeding 0.100 m-2 would not be economically justified in fields with RKN soil densities below 50-100 juveniles (J2) 100 cm-3 of soil, since the cost of the treatment would exceed the increase in yield and net return obtained after reducing RKN soil densities by the nematicidal treatment.
The maximum RKN soil densities that soil disinfestation treatments could manage, keeping profitability in strawberry intensive crops, were 1289 J2 100 cm-3 of soil for 1,3-dichloropropene+chloropicrin and 1115 for biosolarization with chicken manure.
Profitable ranges for less effective nematicidal treatments ranged between 30 and 238 J2 100 cm-3 of soil.
Fumigation with 1.3-dichloropropene+chloropicrin and biosolarization with chicken manure were the only treatments capable of reducing high RKN soil populations, while maintaining profitability.
Other nematicidal treatments were unable to reduce high RKN soil infestations to nematode economic thresholds but were profitable when RKN soil densities were below these thresholds.
Effectiveness of agrochemicals, botanicals, and biosolarization in reducing root-knot nematode (RKN) populations in strawberry fields was calculated in multiple field trials.
After fumigation with 1.3-dichloropropene+chloropicrin or dimethyl-disulphide, soil nematode populations were reduced by 78-87%. Other agrochemical nematicides showed efficacies ranging from 51 to 64%, whereas botanicals reduced nematode populations by 41-48%. The combination of solarization with organic amendments (biosolarization) reduced soil nematode populations by 73%. A cost-benefit analysis of soil disinfestation methods for the pathosystem strawberry-M. hapla was conducted.
Nematicidal treatments with costs exceeding 0.100 m-2 would not be economically justified in fields with RKN soil densities below 50-100 juveniles (J2) 100 cm-3 of soil, since the cost of the treatment would exceed the increase in yield and net return obtained after reducing RKN soil densities by the nematicidal treatment.
The maximum RKN soil densities that soil disinfestation treatments could manage, keeping profitability in strawberry intensive crops, were 1289 J2 100 cm-3 of soil for 1,3-dichloropropene+chloropicrin and 1115 for biosolarization with chicken manure.
Profitable ranges for less effective nematicidal treatments ranged between 30 and 238 J2 100 cm-3 of soil.
Fumigation with 1.3-dichloropropene+chloropicrin and biosolarization with chicken manure were the only treatments capable of reducing high RKN soil populations, while maintaining profitability.
Other nematicidal treatments were unable to reduce high RKN soil infestations to nematode economic thresholds but were profitable when RKN soil densities were below these thresholds.
Authors
M. Talavera, L. Miranda, B. de los Santos, J.J. Medina, M.D. Vela
Keywords
nematicide, Meloidogyne, profitability, cost-benefit
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