Design ,construction and evaluation of a tractor air assisted boom sprayer against Sunn pests and comparison with conventional sprayers

and turboliner sprayer in 1% confidence level respectively. Sunn pest is one of the most important pests in wheat fields. Airplane used to combat this pest in the already decades. The air sprayers were obsoleted and introduced Turboliners sprayers, according to agricultural policies and environmental pollution in recent years. Poisonous droplets arent reached to target effectively in these sprayers and poluted environment. Therefore, the appropriate sprayer was designed and built. The first year of this study was designed and built a atractor boom sprayer equipped with nozzle of blower to work within 8 meters. Then, the second year compared and evaluated with Turboliner Sprayer, conventional Boom sprayer, Air assisted boom sprayer ,Micronair sprayer and Mist blower sprayer in Randomized Complete Block Design with four replications. The study was conducted in one of the fields that infected by Sunn pest in Hashtgerd region. Parameters were percentage of dead pests, percentage of crop damages, field capacity and efficiency, spraying steady and percentage of coating. Mstat-C software was used for data analysis. The results showed that treatment using Boom sprayer with Air assisted have the highest percentage of dead pests, and other treatments were the next group. High percentage of drift at 1% confidence level, and Turboliner and Micronair sprayers were first group and air Assisted Boom sprayer was in the lowest group, in aspect of drift percentage. Turboliner Sprayer had the highest theoretical and effective capacity, Automizer and Micronair sprayers had the lowest capacity. There was no significant in terms of field efficiency. The Boom and Turboliner sprayers had the highest (10.5%) and lowest crop damage respectively. The Air assisted sprayer was the highest group in terms of dead pests percentage and other treatments were next groups. These results show that the Air assisted sprayer coverd all parts of wheat crop. Quality of coficient was less than other treatments so, spraying uniformity was more than other treatments. Most and least of covering was related to treatment with Air assisted