What is meant by nematicide?
What is meant by nematicide?
A nematicide is a type of chemical pesticide used to kill plant-parasitic nematodes. Nematicides have tended to be broad-spectrum toxicants possessing high volatility or other properties promoting migration through the soil.
What are nematicide used for?
Nematicides (less commonly known as nematocides) are chemical agents used to control parasitic worms such as roundworms and threadworms. Used in various forms for centuries, they are some of the most widely used pesticides worldwide.
What is fumigant nematicides?
Fumigant nematicides are generally chemicals with high volatility. They move most rapidly through the air speces between soil particles. Therefore, their movement may be restricted if soil pore spaces or pore necks are filled with water.
Which are the examples of nematicides?
Several fumigant nematicides (Table 2) are available for use against plant-parasitic nematodes. The most common fumigants used to control nematodes in vegetable crops in Georgia are Telone II, chloropicrin, Vapam (metam sodium), and Paladin (dimethyl disulfide or DMDS).
What is soil fumigant?
Soil fumigation is a preplant chemical treatment of soil, using a pesticide product that converts to form a volatile gas. The gas is able to diffuse through open pore space throughout the soil to provide soil-borne pest and disease control.
How do you use nematicide?
The nematicide may be applied as granules metered into or over the seed rows during sowing or as a liquid dribbled into the seed furrows. Alternatively, the row positions may be fumigated and the seeds sown in the treated bands of soil, when they are no longer phytotoxic.
What kills root knot nematodes?
To kill nematodes in soil, heat small quantities of moist soil to 140°F in the oven or by solarization. Heating soil in the oven over a time period needed to bake a medium-sized potato placed in the center of the soil is sufficient to kill nematodes; however, this is only practical for small quantities of soil.
How do you control nematodes in tomatoes?
Crop Rotation: Crop rotation to a non-host crop can be a useful tool to help manage root-knot nematodes. By alternating to a crop that the nematodes can neither feed on nor complete their life cycle on, this tool can promote a decline in root-knot nematode populations in the soil.
How do you control nematodes?
The most reliable practices are preventive, including sanitation and choice of plant varieties. You can reduce existing infestations through fallowing, crop rotation, and soil solarization. However, these methods reduce nematodes primarily in the top foot or so of the soil, so they are effective only for about a year.
What are nematocides and how do they work?
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…
What are the different types of chemical nematicides?
There are two main categories of chemical nematicides based on their volatility – non-fumigants and fumigants. Fumigant nematicides disperse through the soil as a result of their volatility. Non-fumigant nematicides must be mechanically mixed throughout the soil profile, or spread in aqueous solution.
Can you use nematicides on golf courses?
There are two products commonly used as nematicides, fenamiphos (Nemacur) and ethoprop (Mocap), both of which are classified as organophosphates. Neither compound is registered for use on golf courses or turfgrass.
How do non-fumigant nematicides diffuse?
Non-fumigant nematicides have low volatility and diffuse through the soil (generally for short distances only) disoolved in the soil solution. Their movement may be enhanced by water movement through irrigation or rainfall.
