The Coconino sun., 1917-08-17

Bean Co., san Jose, CallIornla. | Don A. Carpenter Co.,, Fl Paso, Texas.
 Trend Mfg. Co.,, Watsonville, Calif.
 Dening Co.,, Salem, Ohio.
 Bateman Mfg. Co.,, Greenlock, New Jersey.
 Catalogues may be had by writing for them.
 Material To Spray With
 Some one of the arsenical stomach poisons should be used. There are two prominent ones. Paris Green is the better known of the two. Arsenato of Lead is recommended for use as spray to kill the Colorado potato beet le. There are several reasons the principal ones being that it will stick on the plants long time and it stays suspended in water much longer time than Paris Green causing a mora even spray. It will not burn the plants under ordinary conditions. Paris Green may burn the plants unless there be used with it an equal amount of freshly slaked lime. It is very heavy and settles to the bottom of the tank quickly. It washes off the plants very easily. Arsenato of Lead, powder not past therefore is the material that should be used to spray potatoes to kill Colorado potato beetles and other leaf feeding insects. It should be used at the rate of two pounds to fifty gal Ions of water and with it use two pounds of whale oil soap or some cheap laundry soap previously de- solved in water. The soap helps spread the poison and also stick it on. Arsenato of Lead may be obtained at the following places:
 Arizona Seed Co.,, Center Street, Phoenix.
 The General Chemical Co. San Francisco, Calif.
 The Western Wholesale Drug Co.,, Los Angeles, Calf.
 The Brunswick Drug Co.,, Los An geles, Calif.
 It will cost in to 50 pound lots be- tween 30 to 40 cents a pound; in 100 pound lots or over 22 to 30 cents a pound. These quotations were obtained by the Arizona State Department of Agriculture and Horticulture abou. two months ago. The price may have increased a little for all insecticids are scarce on account of commercial disturbances. Potatoes should be sprayed thoroughly at the time the first adult beetles show upon the young plants. If these beetles are killed the battle is won. The second spraying should come about week later if the redish larvae show up in numbers. A third spraying might have to be done depending on whether the pest shows up again later in the season.
 Where several men or community are growing potatoes in such acreages so that one person cannot afford to buy a large traction sprayer it would seem that several men might'get to- tgether or perhaps whole community and buy a good traction sprayer of the larger size and work it cooperat' lively.
 One of the most important things in control of the Colorado potato beetle is a thorough cleaning up of the fields after the crop is off. Leave no refuse in the fields of potatoes that the beetle can feed upon, then deep and thorough fall blowing should be done.
 Information in regard to insect pests or fungus diseases of crops will promptly be cared for if sample of pest and plant attached is sent the Department of Agriculture and Horti- culture, Box 348, Phoenix.
 The writer is at present making his headquarters at the Whetherford Hotel, Flagstaff, and would be glad to get in touch with anyone who is hay ing trouble with any crop.
 OSCAR c. BARTLETT, Ph. D.
 Assistant State Entomologist State Dept. of Agriculture and Horticulture
 Box 348, Phoenix, Arizona.