Research Papers: Relation Between the Method of Incorporation of Systemic Nematicides into Soil and their Effectiveness against Root-Knot Nematode on Peanuts

The influence of the method of incorporation into soil on the effectiveness of systemic nematicides was studied in a peanut field of sandy loam infested with Meloidogyne arenaria (Neal) Chitwood. Granular formulations of phenamiphos (Nemacur 15G), aldicarb (Temik 15G) or oxamyl (Vydate 10G) were applied to Florunner peanuts at planting time at a rate of 3.4 kg a.i./ha in a 36-cm band. Treatments for each nematicide included no incorporation, shallow (2.5-5 cm) incorporation by means of spring-activated scratchers, and deep incorporation by disking (10-14 cm) or rototilling (20 cm). In a 1977 experiment with phenamiphos yield response was best in plots where the nematicide was not incorporated or where it was only scratched-in. Results from a 1978 experiment with phenamiphos, aldicarb, and oxamyl indicated that application of the nematicides resulted in significantly increased yields regardless of method of incorporation. Control of Meloidogyne arenaria in the 1977 and 1978 seasons wi