Articles
Non-fumigant nematicides and root-knot nematode management in Californian carrots
Article number
1393_16
Pages
125 – 130
Language
English
Abstract
Root-knot nematodes (RKN), Meloidogyne spp. are the most important plant parasitic nematodes affecting the fresh market carrot production in California.
The root-knot nematodes can cause substantial damage by stubbing, forking, and galling the roots thereby reducing marketable yields.
The galled feeder roots are unable to sustain the water and nutrient needs of the plants leading to yield reduction.
Currently, there are no resistant cultivars available for the Californian carrot industry and management has mainly relied on the use of pre-plant soil fumigants such as Telone II (a.i. 1,3-dichloropropene) and metam sodium or metam potassium.
However, new fumigant regulations by the Department of Pesticide Regulations (DPR) have been put in place and due to these regulations, substantial parts of the field or the entire field may not be treated by fumigation because of buffer zone requirements.
New nematicides with novel modes of action have emerged from major agricultural chemical companies in the last few years that have shown excellent performance in managing RKN. Fluazaindolizine (Corteva), fluensulfone (Adama), fluopyram (Bayer), and a new developmental Product (Syngenta) have shown excellent nematicide properties in the field trials conducted in moderate to high RKN infested soils.
These new chemistries have effective new modes-of-action, lower mammalian toxicity, and lesser environmental impacts than previous generations of nematicides.
The root-knot nematodes can cause substantial damage by stubbing, forking, and galling the roots thereby reducing marketable yields.
The galled feeder roots are unable to sustain the water and nutrient needs of the plants leading to yield reduction.
Currently, there are no resistant cultivars available for the Californian carrot industry and management has mainly relied on the use of pre-plant soil fumigants such as Telone II (a.i. 1,3-dichloropropene) and metam sodium or metam potassium.
However, new fumigant regulations by the Department of Pesticide Regulations (DPR) have been put in place and due to these regulations, substantial parts of the field or the entire field may not be treated by fumigation because of buffer zone requirements.
New nematicides with novel modes of action have emerged from major agricultural chemical companies in the last few years that have shown excellent performance in managing RKN. Fluazaindolizine (Corteva), fluensulfone (Adama), fluopyram (Bayer), and a new developmental Product (Syngenta) have shown excellent nematicide properties in the field trials conducted in moderate to high RKN infested soils.
These new chemistries have effective new modes-of-action, lower mammalian toxicity, and lesser environmental impacts than previous generations of nematicides.
Authors
J. Sidhu, J.J. Nunez
Keywords
root-knot nematodes, Meloidogyne sp., carrots, nematicides
Online Articles (40)