Authors : N.O. Erhunmwunse, B.N. Iloba and A.R. Dirisu
Abstract: The Recovery rate (Rr) of eight orders of soil microarthropods present in the soil during the period of the field experiment were investigated for a period of 90 days after the application of carbofuran insecticide at a depth of 0-5 cm. The Rr for Acarina (9.0x10-5 sec-1 for double treated plot and 1.02x10-5 sec-1 for single treated plot) and Coleopteran (5.0x10-6 sec-1 for double treated plot and 2.3x10-6 sec-1 for single treated plot) were the highest due to the nature of their exoskeletons and the effect of the carbofuran insecticide on other predators. The Recovery rate (Rr) of Hymenoptera (H) and Thysanoptera (TH) were the lowest observed during this period of investigation: HRr = 4.0x 10-7 sec-1, THRr = 3.0x 10-7 sec-1. There was no significant difference (p>0.05) in the Recovery rate (Rr) of soil microarthropod caught in the double treated plots to single treated plots. The correlation between the Total Hydrocarbon Content (THC) and the total number of soil microarthropods caught at both treatment were significant at 0.05 and 0.01 probability level with r = -0.96 for double treated plots and - 0.75 for the single treated plots. The implication of the above statement shows that the reductions of THC lead to the increase in the soil microarthropods.
N.O. Erhunmwunse, B.N. Iloba and A.R. Dirisu, 2012. Recovery Rate of Soil Microarthropods at Upper 0-5 cm After Treatment with Carbofuran Insecticide. Agricultural Journal, 7: 250-254.