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Smaller and better radios
I I4
CURRENT TOPICS.
[J. F. I.
Killing Apple Worms.--(U. S. Dept. of Agric. Clip Sheet No. 776.) The Bureau of Entomology has made available for those who desire them detailed directions on how to prepare chemically treated bands to protect fruit trees against the codling moth caterpillars. These caterpillars start to leave the fruit about the middle of June and seek the nearest dark, protected place for spinning their cocoons. Loose bark on the trunk and branches, or debris on the ground, normally provide suitable quarters. If the trees have been scraped and the orchard thoroughly cleaned up, however, the bands around the trunk of the tree will attract 5o per cent. or more of the worms. These bands consist essentially of a 2-inch strip of corrugated paper treated with a mixture of beta-naphthol (I pound) and lubricating oil (I ~ pints). Bands so treated, automatically kill practically all the worms that spin their cocoons in contact with it. The number killed may amount to as many as a thousand worms to the tree each season. C. Smaller and Better Radios.--(U. S. Dept. of Agric. Clip Sheet No. 777.) The forest service is putting through the final tests a new portable radio set so light and durable that it can readily be carried in the back-pack of a forest worker. It weighs only I3 pounds and will transmit as well as receive voice messages. This set will supplant the older 56-pound portable set designed to receive and transmit both voice and code as well as a smaller portable set weighing I I pounds which received voice but transmitted code only. The new set uses short wave-lengths and special new-type tubes, and should be capable of maintaining communication throughout an entire national forest. C.
CURRENT TOPICS.
[J. F. I.
Killing Apple Worms.--(U. S. Dept. of Agric. Clip Sheet No. 776.) The Bureau of Entomology has made available for those who desire them detailed directions on how to prepare chemically treated bands to protect fruit trees against the codling moth caterpillars. These caterpillars start to leave the fruit about the middle of June and seek the nearest dark, protected place for spinning their cocoons. Loose bark on the trunk and branches, or debris on the ground, normally provide suitable quarters. If the trees have been scraped and the orchard thoroughly cleaned up, however, the bands around the trunk of the tree will attract 5o per cent. or more of the worms. These bands consist essentially of a 2-inch strip of corrugated paper treated with a mixture of beta-naphthol (I pound) and lubricating oil (I ~ pints). Bands so treated, automatically kill practically all the worms that spin their cocoons in contact with it. The number killed may amount to as many as a thousand worms to the tree each season. C. Smaller and Better Radios.--(U. S. Dept. of Agric. Clip Sheet No. 777.) The forest service is putting through the final tests a new portable radio set so light and durable that it can readily be carried in the back-pack of a forest worker. It weighs only I3 pounds and will transmit as well as receive voice messages. This set will supplant the older 56-pound portable set designed to receive and transmit both voice and code as well as a smaller portable set weighing I I pounds which received voice but transmitted code only. The new set uses short wave-lengths and special new-type tubes, and should be capable of maintaining communication throughout an entire national forest. C.