ISSN:
1570-7458
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Description / Table of Contents:
Summary The digestive tract of larvae and adults of the Colorado beetle was studied under feeding conditions with different insecticides or alkaloids, moreover the behaviour of the insects was tested on such substances. Arsenic damages the cuticle of the mid-gut and ultimately causes it to dissolve completely. It was found that an excessive secretion results after ingestion of preparations of DDT and of esters of thiophosphoric acid. A vacuole is formed in the greatly swollen nucleolus. Physostigmine, Nicotine, Colchicine and Veratrine are very toxic. Nicotine and Physostigmine produce no noticeable histological changes; Veratrine and Colchicine damage the epithelium increasingly. Uptake of Colchicine leads first to abnormal mitosis, later to dissolution of the epithelium. Atropine acts in quantities naturally found in Atropa belladonna leaves either by forming tumors or is acutely toxic. Greatly increased doses produce both toxic and tumor forming responses. Tomatine has an exclusive bitter-tasting effect, but as few acute pathogenic changes could be found after uptake of Tomatine as after ingestion of extracts of different sources of Solanum demissum.
Notes:
Zusammenfassung Es werden die Ergebnisse der Untersuchungen über die Wirkung der Alkaloide: Tomatin, Atropin, Nicotin, Colchicin, Veratrin und Physostigmin, sowie der Insektizide: Arsenik, Wofatox (Thiophosphorsäureesterpräparat) und Certoxan (DDT-Präparat) auf den Darmkanal und auf das Verhalten von Larven und Adulten des Kartoffelkäfers mitgeteilt und kurz besprochen.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00350951
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