Showing papers by "Universidade Federal Rural do Rio de Janeiro published in 1983"
TL;DR: From July to December 1977 and from June to November 1978 the toxic effects of Ambylomma cajennense were studied in cattle sheep and goats, with tick paralysis reported for the first time in Brazil.
Abstract: From July to December 1977 and from June to November 1978 the toxic effects ofAmbylomma cajennense were studied in cattle sheep and goats. Locomotor disturbances commencing as hind-limb paralysis ascended to the upper nervous centres causing paralysis. This was observed in natural infections and confirmed experimentally. Tick paralysis is reported for the first time in Brazil, manifesting itself in a different form to that usually attributed clinically to the disease. Also for the first time reference is made to tick paralysis induced by all developmental stages ofA. cajennense.
27 citations
TL;DR: The structure of juruenolide, a constituent of Iryanthera juruensis and I. ulei is revised to (2S, 3R, 4S)-3-hydroxy-4-methyl-2-(19′-piperonyl-1′-n-nonadecyl)-butanolide as discussed by the authors.
25 citations
TL;DR: Dysdercus ruficollis (Linnaeus, 1764) was treated at the beginning of the fifth intar nymphs, with a juvenile hormone analogue (N(5-chloro-2-methylphenil)-3,7-dimethyl-2,6-octadienylamine), applied topically to the base of wings.
Abstract: Dysdercus ruficollis (Linnaeus, 1764), usually known as "cotton stainers", were treated at the beginning of the fifth intar nymphs, with a juvenile hormone analogue (N(5-chloro-2-methylphenil)-3,7-dimethyl-2,6-octadienylamine), applied topically to the base of wings. After ecdysis the insects showed a dried up appearance, external morphological alterations on the head, thorax, legs, wings and abdomen, hindering their normal activities. However, the external genitalia of both sexes were inaltered. The use of this substance was able to interrupt the biological cycle of the insects.
1 citations