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Abstract Abstract: Effects of four different sprayers and spraying methods on controlling rice leaf roller were studied at Changting County in 2010. The results showed that, 3WF-950 backpack sprayer not only saved time and labor, but its effect of controlling rice leaf roller was significantly higher than that of 20-type electric sprayer or 3W8S-16-type hand sprayer, suggesting this sprayer should be popularized in plant protection machineries. The control effect of 3WH-36 stretcher-style sprayer was slightly lower than that of 3WF-950 backpack sprayer, but its spraying efficiency was significantly higher than the latter. 3WH-36 stretcher-style sprayer can be recommended as plant protection machinery in carrying out large-scale control of rice leaf roller.
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Received: 21 February 2011
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