Show 0 OTT 0 FIGHT MANY ANY PESTS FROM AIR MACHINE an interesting development of 0 tho the future for commercial orchard communities muni ties Is the possibility of fighting insect pests from the air on a large scale wherever trees have been protected by spraying or dusting from the ground the same mixtures can be applied from the air experiments conducted by the army air service in ID cooperation with the united states department part ment of agriculture proved the feasibility and practical usefulness of the method and further studies are being carried on each summer with the aim of still further improving the ap and perfecting the technique the advantages are obvious for an airplane filing at CO riles an hour und passing to and fro on lanes spaced feet apart can cover acres in half and hour if enough of the alie dusting powder to last for that length of time in continuous application can be carried although the firsa experiments on tree dusting from the air were made with airplanes the airship has since come into use for the par pose light er than air craft suh such as small derigi 0 bles es of the zeppelin type the patents tor lor which have been recently taken over by american manufacturers have many advantages adan adNan for this work carry a crew of several men who are tree free to move about while in flight eight and so can readily make adjustments of 0 the app apparatus aratus or reload it they may be designed to have a large reserve reserve of lift permitting the carriage of a supply of powder for covering a great deal of territory in a single flight they can be throttled down to any speed desired so that the application can be made more or less intensive by varying the rate at which the airship passes over the trees finally but most important of ull nil the airship Is immune from the danger of the forced landing in order that the material ased for dusting may be accurately distributed tri buted where it is most needed the machine doing the work roust must fly very low and it if an airplane is used and the en engine ine falls fails when flying over an orchard or a forest it Is of course unlikely that a good landing field will be at hand although forced landings are rare when hen engines are properly cared for and they have been almost unknown in the forest fire ere patrol the possibility of their occurrence does represent a hazard to the machine which Is nonexistent non existent in the case of the air ship in any case whether the ultimate decision favors the he airplane the airship or a choice depending on local conditions in each individual case the use ase of aircraft in the orchard for dusting may become a practical reality at the present time it seems probable that it will only be used on large or in localities where flie smaller growers operate cooperate co and have their spraying and dusting done at the same time liquid sprays could also be applied by the same method il there are some due to the excess carrying caroyln carry ln weight of the liquid over the dust says the american fruit grower alog azine ielne |