What is in this article?:
- Lack of nematicides slows use of variable rate application in peanuts
- Looking for Temik replacement
- Readings can be dramatic
- Crop rotation is best solution
• In recent years development of site specific delivery systems on row crops has been virtually stopped by a lack of reliable nematicides to deliver.
ESTILL, S.C., grower Doug Jarrell used variable rate nematicide technology on peanuts and cotton.
Looking for Temik replacement
Hopefully, a similar aldicarb product, Meymik, will be available in the future. Though cleared for use by the EPA, production of the new product has been delayed by numerous problems. Company officials had hoped to have the product available for growers for the 2013 growing season, but it appears that will not happen.
Having an aldicarb product, like Meymik, would be a big help to growers dogged by persistent yield losses to nematodes.
Cotton has been the dominant crop on many peanut farms in the Southeast for the past few years, and it is frequently plagued by nematode related yield losses.
“In extreme cases, with really high levels of nematodes, we think we were losing as much as 400 pounds of cotton lint per acre.
“Over all our sandier fields, the ones at the highest risk of building up high levels of nematodes, we improved our yields by 250 pounds or so per acre, Jarrell says.
The simple system the South Carolina grower uses was developed by a research team at Clemson University’s Edisto Research and Education Center in Blackville, S.C.
Khalilian says the system, technically named Site Specific Nematicide Placement System, is ready for commercial deployment and use by farmers, but concurs that in peanuts its use has been limited by the scarcity of viable nematicides.
For growers wanting to use a simple ‘shut off-shut-on’ delivery system of nematicides on peanuts, Khalilian says, “The first step is to develop an accurate geo-reference soil texture map. This can be done inexpensively using an electric conductivity meter, commonly called a Veris rig.”
Jarrell, with the help of his consultant, developed his farm maps using a Veris machine that measures electric conductivity of the soil.
Among other data, the Veris map includes color variations that denote different levels of electrical conductivity that varies from lighter, sandy soils, to heavier soils. Nematode populations and damage is known to be higher in lighter, sandier soils.