Pesticides (Do – Fe)
The blended fertilizer must be spread with a properly calibrated applicator that will result in uniform distribution on the soil surface. Dribble spreaders must be calibrated with the blended fertilizer mixture since the flow pattern will generally be slower than the straight dry fertilizer.
Spin spreaders are not recommended.
Ethofenprox (pesticide) exhibits a relatively strong fluorescence in the UV region. Its fluorescence properties were investigated in aqueous solution, organic solvents, and micellar media. The fluorescence intensity of Ethofenprox was enhanced by a factor of 1.2 to 2.7 in the presence of surfactants and by 1.4 in pure organic solvents without significant shift of the excitation and emission wavelengths. The conditions for solid-phase extraction of Ethofenprox from water samples were examined. Among the solid-phase extraction cartridges studied, a Sep Pak C8 with weak sorption ability was found to be the most useful due to the extremely high hydrophobicity of Ethofenprox. For the complete elution of Ethofenprox from the sorbent, an addition of 40%v/v methanol to the sample water was necessary and effective to eliminate the fluorescent impurities of the matrix. The calibration graph obtained was linear over the range of 0.03 to 2.4 mg L(-1) in 100 mL sample. The method was successfully applied to the determination of Ethofenprox in tap, well, and river waters with recoveries of 93.2-95.7%.
Molecular Weight is 277.25. Solubility in water at 20 degrees C, 30 mg/l; at 30 degrees C, 14 mg/l water; nearly insoluble in water. Readily soluble in common organic solvents, e.g. acetone, alcohol, benzene and chlorinated hydrocarbons. dichloromethane, 2-propanol, toluene. Hardly soluble in n-hexane. Soluble in ethers, methanol, xylene, ketones, esters, and aromatic hydrocarbons. Low solubility in alaphatic hydrocarbons. At 20 -25 degrees C, > 1 kg/kg dichloromethane, methanol and xylene, 42 g/kg haxane, 0.1 - 1.0 kg/kg propan-2-ol. It is hydrolyzed by alkali; at 30 degrees C, 50% loss occurs in 4.5 hours in 10M sodium hydroxide. Melting Point is 0.3 degrees C. Vapor Pressure is 7 x 10 to the minus 5 mbar at 20 degrees C (13);18 mPa at 20 degrees C. Partition Coefficient is 2380. Fenitrothion is completely stable for two years if stored at temperatures between 20 and 25 degrees C. Storage temperature should not exceed 40 degrees C. It is unstable in alkaline media. The thermal stability of this compound is low, and when it is heated above 100 degrees C it undergoes Pishchemuka isomerization and may decompose explosively. It must be stored in enameled, aluminum or glass containers. Iron promotes decomposition of fenitrothion. Specific gravity is1.3227; 1.32-1.34; 1.3084 at 20 degrees C. Boiling point is109 degrees C at 0.13 mbar; 164 degrees C at 1.3 mbar (13). 140-145 degrees C/0.1 mmHg. 244 degrees F (118 degrees C) at 0.05 mmHg (113). 118 degrees C at 0.01 mmHg. Flashpoint is166 degrees C (closed cup). Volatility is 0.09 mg/m3.
Fenoxycarb is a carbamate insect growth regulator. It is used as a fire ant bait and for flea, mosquito and cockroach control. Fenoxycarb can also be used to control butterflies and moths (Lepidoptera), scale insects, and sucking insects on olives, vines, cotton and fruit. It is also used to control these pests on stored products.