Overview

Excerpt from Cantaloupe Mosaic Investigations in the Imperial Valley Records of aphid activity during flights showed that when aphids landed they started to feed almost immediately, fed for an average of some LO seconds in one to three feeding periods, then walked to the tip of a leaf and took off. They apparently flew a short distance, again landed, and repeated the feeding performance. In this way they worked theme selves across the country, each aphid feeding for short periods on a con siderable number of plants. Some 50 aphids per minute per melon hill were observed to light during a good flight. The same number left the hill during the same period so that there never was a great concentra tion of aphids on the plants. The winged aphids that are seen resting on melon plants when no flight is on are simply those that were caught there when conditions became unfavorable for flight, because of wind, darkness, or change of temperature. It is probable that if the green peach aphid preferred to feed on melon plants it would be less migratory and hence not so efficient in spreading the mosaic. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Full Product Details

9780364466650

Table of Contents

Reviews

Author Information

Tab Content 6

Customer Reviews

Recent Reviews

Countries Available