Also found in: Dictionary, Medical.
Related to Nematocides: nematicides



chemical substances for destroying harmful herbivorous nematodes. The most frequently used nematocides include chloropicrin, methyl bromide, Nemagon, D-D mixture, and carbation. These substances have fumigant properties and cause intoxication of nematodes upon penetrating the body in steam or gaseous form through the respiratory system. Organic phosphorus compounds are also widely used (Carbophos, Metasystox, Fosphamid), which have a contact or systemic effect. Upon contact with the skin, some nematocides permeate the bodies of the worms. Nematocides with systemic action are absorbed by roots or leaves and spread throughout the plant, thus poisoning parasitic nematodes. Some nematocides, such as chloropicrin, simultaneously destroy insects, fungi, and weeds.

Fumigant nematocides are used to control nematodes that parasitize the roots of plants; they are applied to the soil or, before planting, to seeds, bulbs, tubers, or roots. Organic phosphorus nematocides are applied to plants to destroy stem or leaf nematodes. The methods, frequency, and rate for applying nematocides vary considerably and depend on the properties and form of the preparation, the soil and environmental conditions, the species of nematode, and the plant being protected. Nematocides that are toxic to plants are applied between ten and 40 days before sowing or planting or in the fall before the coming year’s crop. Less dangerous nematocides are used at sowing and planting time or on a vegetating crop. Special storage, transport, application, and safety procedures must be followed.


See references under .


References in periodicals archive ?
From 2007 to 2009, Oraphyte has undergone testing at Louisiana State University, Auburn University, the University of Florida, Ohio State University, and the USDA to determine its efficacy and usefulness as a non-toxic, low-cost alternative to many traditional nematocides, including Nemacur, Curfew, Telone II, and Temik.
The workers were able to document 9 different nematocides with which they worked, 6 herbicides, 11 fungicides, 8 insecticides and 11 fertilizers.
The appointments of Joyce and Fairchild-Coppoletti come as the company continues to realize significant growth of its flagship biofungicide brands -- Serenade(R), Sonata(R), Rhapsody(R) and Ballad(R) Plus -- and accelerates commercialization of its deep and expanding product pipeline into additional pesticide segments such as insecticides, nematocides and fumigants.
They were categorized as fertilizers, fungicides, insecticides, herbicides, nematocides and rodenticides.
Typically, flowers are grown with a variety of fertilizers, insecticides, fungicides, nematocides and plant growth regulators.