Comparison of boom and lance sprayers to control Brevicoryne brassicae (L.) in canola

Tthis research was conducted with the aim of evaluating of two common spraying methods for Brevicoryne brassicae control during stemming stage and to introduce a more suitable method according to the technical parameters affecting the performance and efficiacy of spraying. The test was conducted in the form of a completely randomized design in three treatments and three replications based on the obtained results, for the tractor-mounted boom sprayer and tractor-mounted lance sprayer, the amount of consumed volume was 179 and 279 L/ha, respectively, the effective field capacity was 5.0 and 0.8 ha/hr, respectively, the field efficiency was 56.8% and 55.5%, respectively, the crop damage area obtained 3.85% and 4.45%, respectively, the spray quality coefficient was 1.96% and 3.31%, respectively, and the average drift was 21.0% and 35.7%. Also, there was no significant difference between the two sprayers in 3 and 7 days after spraying. However, 14 days after spraying, there was a significant difference between the treatments, and the spraying efficacy of the boom sprayer reached 83% and 41% for the lance sprayer. Considering the better results of the tractor-mounted boom sprayer and its greater spraying efficiency than the tractor-mounted lance sprayer, this method is recommended to control pests during the canola stemming stage.