Study on efficiency of different spraying methods against potato yellow broad mite
2010
Namvar, Peyman | Heydari, A. | Garami, K. | Amiri, R.
Yellow broad mite Polyphagotarsonemus latus is a serius pest on fall potato in Jiroft. Because of the importance of acaricides which are the only practical way to control of this pest now and to increase the efficiency and decrease of che chemical usage, this study on different study methods was carried out. For this purpose four different sprayers which were Hydrolic Motorized sprayer on Trolly, Motorized Knapsack Mistblowers Sprayer, Motorized Knapsack Mistblowers Sprayer with Electrostatic head and Micron air sprayer with two different concentrations of bromopropilat were evaluated on base of Randomized complete Block design (RCBD) in factorial test. Results showed that Motorized Knapsack Mistblowers Sprayer with Electrostatic head had the best efficacy for its good coverage of droplets on the underside of leaves which pest exists and decreasing of chemical volume usage to 40 liter/hac and it followed by Motorized Knapsack Mistblowers Sprayer because high pressure of air flow due to middle coverage of droplets on the underside of leaves. In the other hand although micron air sprayer decreased chemical usage to 60 liter/hac and produced the most uniform droplets and also Hydrolic Motorized sprayer on Trolly had the least efficacy.
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