Abstract The dissipation of ethoprophos and tricyclazole in soil their translocation tendency to spinach were investigated. Prior field trials, the analytical method for determination these pesticide residues was optimized validated on spinach. trial conducted under greenhouse conditions two different pretreatment periods with pesticides. After treating pesticides 30 (PBI-30) 60 days (PBI-60) b...

Degradation in soils is the result of a combination of chemical and, predominantly, biological events (Bollag and Liu, 1990; Wu and Nofziger, 1999). A first-order degradation model is often used to simulate the decrease of residual mass of a chemical compound in a soil system after its application (Dykaar and Kitanidis, 1996; Walker, 1974). If the first-order rate constant or half-life remains ...

Actinomycetes are promising tool to control plant disease and to promote plant growth. In ayurved system of medicine rhizome portion of Curcuma longa L. was used as an antiseptic. Antimicrobial substances released from these plants diffuse into the surrounding soil area of the plant. Actinomycetes which grow in these areas are resistant to these substances. Different types of pesticide and chem...

sults in predicting residual soil NO 3 –N (Shaffer et al., 1991; Follett et al., 1994; Shaffer et al., 1995). These Most agricultural systems in the San Luis Valley of south-central researchers used the previous 1.10 version of NLEAP Colorado include rotations that have crops with different rooting that was capable of simulating the effect of management depths. The previous version of Nitrate L...