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Evaluation of non-fumigant chemical and biological nematicides for strawberry production in Florida

Author:
Watson, Tristan T., Desaeger, Johan A.
Source:
Crop protection 2019 v.117 pp. 100-107
ISSN:
0261-2194
Subject:
1,3-dichloropropene, Belonolaimus longicaudatus, chloropicrin, field experimentation, free-living nematodes, fruit yield, growers, growing season, horticultural crops, integrated pest management, metam, plant establishment, plant parasitic nematodes, potassium, sandy soils, soil fumigation, soil treatment, strawberries, vigor, Florida
Abstract:
In Florida, strawberry is an economically important horticultural crop. Plant-parasitic nematodes present a significant obstacle for strawberry growers in the sandy soils found in this state. Historically, nematodes have been controlled through the application of soil fumigants; however, there is interest in exploring the use of non-fumigant nematicides that can provide similar levels of control and at the same time be more environmentally friendly than fumigants. Using two field experiments, the effects of non-fumigant chemical and biological nematicides on plant vigour and fruit yield, populations of plant-parasitic nematodes, and populations of free-living nematode feeding groups were evaluated. In experiment 1, soil fumigation with metam potassium, as well as all non-fumigant chemical nematicides (fluopyram, fluensulfone, fluazaindolizine) failed to increase plant vigour, fruit yield, or suppress populations of plant-parasitic nematodes. In experiment 2, fluopyram increased fruit yield and suppressed Belonolaimus longicaudatus populations by the end of the growing season. Biological nematicides (Dazitol®, Majestene®, and Nemakill®) did not enhance crop establishment or suppress plant-parasitic nematode populations. Soil fumigation with 1,3-dichloropropene + chloropicrin provided consistent enhancement of plant vigour and fruit yield, as well as suppressed populations of B. longicaudatus; however, populations of free-living nematodes were also reduced. Overall, soil application of fluopyram shows potential to be a component of an integrated pest management strategy for the control of B. longicaudatus populations on strawberry in Florida.
Agid:
6235685