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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 edition. Excerpt: ...confined 98 (72 per cent) were dead at the end of a week. On December 8 a check experiment was begun. In each of two cages bees taken from healthy colonies were confined and kept at room temperature. At the end of one week out of 59 bees confined 5 (8 per cent) had died. Out of a total of 472 diseased bees confined 393 (83 per cent) were dead at the end of one week, while out of a total of 59 healthy bees kept under similar conditions only 5 (8 per cent) were dead at the end of a week. Although such experiments are subject to great variation and should be repeated many times for definite results, yet the difference between 83 per cent of loss in the case of infected bees and 8 per cent of loss in the case of healthy ones is sufficiently great to justify the conclusion that the heavily infected bees under the conditions of the experiment possessed less endurance than the healthy ones. These results indicate that weakness in a colony may result directly from infection among the workers. Throughout the investigations which have been made on the disease, therefore, evidence has been obtained indicating that weakness results not from the infection of the queen, drones, or brood, but of the workers. RESISTANCE OF NOSEMA APIS TO HEATING. NOSEMA APIS SUSPENDED IN WATER. Preliminary results indicating the minimum amount of heating that is necessary to destroy Nosema apis were given in an earlier paper (White, 1914). Other experiments have been performed. In conducting the experiments a suspension was made in water of the crushed stomachs and intestines of Nosema-infected bees. This suspension was distributed in test tubes in such a dilution that the amount in each tube contained the infective material of from 5 to 10 bees. The tubes were stoppered...
| ISBN-13 | 9781152742017 |
|---|---|
| ISBN-10 | 1152742019 |
| Weight | 0.20 Pounds |
| Dimensions | 9.00 x 6.00 x 0.12 In |
| List Price | $14.14 |
| Format | Paperback |
|---|---|
| Pages | 52 pages |
| Publisher | |
| Published On | 2010-01-01 |
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