Bulletin Michigan. Agricultural Experiment Station, East Lansing Volume 90-111 download ebook

Bulletin Michigan. Agricultural Experiment Station, East Lansing Volume 90-111. Books Group

---------------------------------------------------------------
Author: Books Group
Number of Pages: 276 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
Format: Pdf
ISBN: 9781130326697
Download Link: Bulletin Michigan. Agricultural Experiment Station, East Lansing Volume 90-111
---------------------------------------------------------------

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 Excerpt: ...the puncture. They are all characterized by having a beak. In the accompanying cut, the head and beak of the tarnished plant bug are shown. The four needle-like parts work together in the groove inside the beak, and, after they have pierced the plant, the sap is sucked up through this groove into the stomach. The beak does not enter the plant, but only presses against it.. In the very young stage of this tarnished plant bug, the whole operation showed more plainly than any before observed. The piercing needles entered the plant as rapidly and apparently as easily as one could push a pin into a cushion. As the needles passed on through the stalk, the jointed beak became telescoped till it was all in two joints and scarcely half the length it was at first. It is thought by many that these bugs injure the plants by secreting a poison when the sap is drawn. It is quite probable this may be so for the purpose of increasing the flow of sap. We all know of the mosquito poisoning for a similar purpose the puncture it makes. Fig. 4.--Head of the tarnished plant Ddk. showing the jointed beak, nr rostrum, n, and the four needlelike month farts, b, used in piercing plants--(original). All through the season, leaf hoppers were common on the celery. Early in the season they were especially abundant, usually flying ahead of one like a swarm of flies, as he passed through the field. When the plants are small, these leaf hoppers do a great deal of injury by sucking the sap from the plant through the thousands of little punctures that they make with their pointed, beak-like mouth parts (see 4a, plate I). While the plants, for the first few weeks after transplanting, are having their hardest struggle for existence, the little leaf hopper's work is the most destructive. This s...

Read online Bulletin Michigan. Agricultural Experiment Station, East Lansing Volume 90-111 Buy and read online Bulletin Michigan. Agricultural Experiment Station, East Lansing Volume 90-111 Download and read Bulletin Michigan. Agricultural Experiment Station, East Lansing Volume 90-111 for pc, mac, kindle, readers Download to iPad/iPhone/iOS, B&N nook Bulletin Michigan. Agricultural Experiment Station, East Lansing Volume 90-111 ebook, pdf, djvu, epub, mobi, fb2, zip, rar, torrent