Diazinon applicators

L/minute just prior to spraying on days 0, 28, and 56, approximately 16-20 hours post-treatment, and at various intervals thereafter. Diazinon levels increased immediately after spraying, but decreased rapidly to 2-3 pg/m3 in less than 1 day and continued to decrease to less than 0.05 pg/m3 until the next spraying. During many months of diazinon application there was little buildup in background diazinon air levels (<0.5 pg/m3). 

The use of a 2-day lag period from the time of diazinon application to the use of office or domestic indoor space appears adequate to eliminate exposure risks from vapors and residues that might be incurred from either inhalation or dermal absorption. Air sampling of a room treated with 36 pest control strips measured a maximum diazinon air concentration of 1.34 pg/m3 15 days postapplication (Jackson and Lewis 1981). Similarly, Williams et al. (1987) found that air sampling in two animal facility areas used by facility personnel and treated monthly with a 1% aqueous diazinon solution measured 2-3 pg/m3 less than 24 hours postapplication. Currie et al. (1990) also measured diazinon air concentrations in empty and... 

Figure 1 Mean diazinon dissipation from vegetation collected within two orchards in Pennsylvania following five applications spanning Julian days 93-187. Note that leaves were infrequently present until Julian day 120...

Diazinon SOW was applied by air blast sprayers in accordance with typical application practices for orchards. Application began in March and continued until early-to mid-July. Dormant sprays typically contained diazinon in an oil mixture. Aqueous emulsions were applied as foliar sprays thereafter. Eqmpment was calibrated to provide an application rate of 3.4 kg active ingredient (a.i.)ha At least five applications were made at approximately 2-week intervals. During these applications, 233 samples were taken from spray tanks across the four treatment fields to estimate the application rate in PA, and 244 samples were collected in WA. 

Table 1 Diazinon concentrations in crop samples collected from European starlings (Sturnus vulgarus) following several applications to orchards in eastern Washington, USA...

Location Species N Days 0-12 post-application Diazinon n concentration ... 

Diazinon adversely affects survival of developing mallard embryos when the eggshell surface is subjected for 30 seconds to concentrations 25 to 34 times higher than recommended field application rates. Mortality patterns were similar for solutions applied in water or in oil (Table 16.3). 

Age of Eggs (days) Solution Vehicle (water or oil) Diazinon Cone. (mg/L) Percen t Dead Approximate Field Application Rate... 

Kendall, R.J., L.W. Brewer, and R.R. Hitchcock. 1993. Response of Canada geese to a turf application of diazinon AG500. Jour. Wildl. Dis. 29 458-464. 

In many applications nowadays it is essential to link a mass spectrometer to the gas chromatography in order to achieve positive identification and sensitivity of analysis. Some 12 types of compounds are listed in Table 1.11(a) which are based on the application of this technique, viz. polyaromatic hydrocarbons, polychlorobenphenyls, dioxins, chloro, carbamate and triazine types of herbicides and pesticides, Diazinon, Dicamba, Imidazoline and Cyperquat herbicides and herbicide pesticide mixtures. 

Diazinon rapidly disappeared from cotton leaves within 24 h. The concentrations of diazinon residues on cotton leaf following application after 0, 24, 48, 72, and 96 h were 32.9, 7.56, 4.51, 2.24, and 3.32 mg/m respectively (Ware et ah, 1978). 

Sears, M.K., Bowhey, C., Braun, H., and Stephenson, G.R. Dislodgable residues and persistence of diazinon, chlorp3uifos and isofenphos following their application to turfgrass. Pestle. Scl, 20(3) 223-231, 1987. 

Sethunathan, N. and Pathak, M.D. Development of a diazinon-degrading bacterium in paddy water after repeated applications... 

Diazinon Organophosphate 333-41-5 1.14 1953 Insectic. An insecticide used to control sucking and chewing insects on a wide range of crops including top fruit. It also has livestock applications... 

---