From the report, "Hop pests and their control: A Report of the Control of the Hop Red Spider and Other Closely Related Problems During the Season of 1940," Morrison, H.E.; Vertrees, J.D. (Jack)
Pankalla Hop Ranch, Corvallis Oregon From the report, "Hop pests and their control: A Report of the Control of the Hop Red Spider and Other Closely Related Problems During the Season of 1940," Morrison, H.E.; Vertrees, J.D. (Jack)
"Note Y's used to divide dust stream. Also note that this old type duster with dust entering air-stream after air leaves the fan. This type is quite inferior to the newer types which thoroughly mix the air and the dust by passing through the fan." From the report "Hop pests and their control: A Report of the Control of the Hop Red Spider and Other Closely Related Problems During the Season of 1940," Morrison, H.E.; Vertrees, J.D. (Jack)
From the report, "Hop pests and their control: A Report of the Control of the Hop Red Spider and Other Closely Related Problems During the Season of 1940," Morrison, H.E.; Vertrees, J.D. (Jack)
Chittenden Hop Ranch, Salem, Oregon. From the report "Hop pests and their control: A Report of the Control of the Hop Red Spider and Other Closely Related Problems During the Season of 1940," Morrison, H.E.; Vertrees, J.D. (Jack)
"This unit did not have adequate capacity for hop dusting." From the report, "Hop pests and their control, 1941," by HE Morrison, Irwin Marks, Dan Bonnell