Pflanzenabwehrstoffe XXXI [1] Molluskizide Eigenschaften von Chinonen

1987 ◽  
Vol 42 (1-2) ◽  
pp. 31-32 ◽  
Author(s):  
Hermann Schildknecht ◽  
Johannes Lubosch
Keyword(s):  
Planorbis Corneus ◽  
Molluscicidal Activity

Abstract The quinone 2-methoxy-6-n-pentyl-2,5-cyclohexadien-1,4-dion (Primin) was found to possess molluscicidal activity against the snail Planorbis corneus. The synthesis of homologous and isomers and the results in the biotests are reported.

Control of feeding movements in the freshwater snail Planorbis corneus

1988 ◽  
Vol 70 (2) ◽  
pp. 332-341 ◽  
Author(s):  
Yu. I. Arshavsky ◽  
T. G. Deliagina ◽  
G. N. Orlovsky ◽  
Yu. V. Panchin
Keyword(s):  
Freshwater Snail ◽  
Planorbis Corneus

Investigations of Molluscicidal Activity of Certain Sudanese Plants Used in Folk-Medicine. Part IV*

Planta Medica ◽  
1984 ◽  
Vol 50 (01) ◽  
pp. 74-77 ◽  
Author(s):  
Ahmed El Hadi ◽  
Ahmed Bashir ◽  
Yahia El Kheir
Keyword(s):  
Folk Medicine ◽  
Molluscicidal Activity

Problems associated with the use of tetraethylammonium to test for monosynaptic connexions

1975 ◽  
Vol 62 (3) ◽  
pp. 797-803
Author(s):  
M. S. Berry ◽  
V. W. Pentreath
Keyword(s):  
Nervous System ◽  
Transmitter Release ◽  
Gastropod Mollusc ◽  
Postsynaptic Response ◽  
Postsynaptic Potential ◽  
Planorbis Corneus

Several investigators of the molluscan nervous system have used TEA, injected into presynptic neurones, to determine whether the connexions made by these neurones are monosynaptic. The increase in spike duration produced by the TEA causes an increase in transmitter release, and hence an increase in the amplitude of the postsynaptic potential if the connexion is direct. If the connexion is indirect, the spike in an intercalated neurone will not be affected by the TEA, and the postsynaptic response will remain constant. Experiments described here show that TEA can cross electrotonic junctions in the gastropod mollusc Planorbis corneus. They also show that each TEA-prolonged presynaptic impulse may produce more than one postsynaptic impulse. A larger postsynaptic potential could therefore be produced by presynaptic injection of TEA in the case of an indirect connexion. This indicates that care must be taken when interpreting the results of experiments using TEA to test for monosynaptic connexions.

scholarly journals Molluscicidal activity of crown of Christ (Euphorbia splendens var. hislopii) (Euphorbiaceae) latex submitted to pH variation

2003 ◽  
Vol 46 (3) ◽  
pp. 415-420 ◽  
Author(s):  
Maurício Carvalho Vasconcellos ◽  
José Augusto Albuquerque dos Santos ◽  
Ivonise Paz da Silva ◽  
Fátima Eliana Ferreira Lopes ◽  
Virgínia Torres Schall
Keyword(s):  
Mortality Rate ◽  
Aqueous Solutions ◽  
Schistosoma Mansoni ◽  
World Health Organization ◽  
Biomphalaria Glabrata ◽  
World Health ◽  
Ph Variation ◽  
Health Organization ◽  
Minor Concentration ◽  
Molluscicidal Activity

Laboratory and field bioassays have confirmed the specificity of the molluscicidal activity of the Euphorbia splendens var. hislopii latex (crown of Christ) (Euphorbiaceae) over snails of the species Biomphalaria glabrata, B. tenagophila, B. straminea, B. pfeifferi and Bulinus sp. in the control of Schistosoma mansoni. In the present study, the effect of the pH variation on lethal concentration (LC90) over B. tenagophila was evaluated. Bioassays with the aqueous solutions of the latex ranging from 0.4 to 12 µl/l were adjusted for pH of 5.0; 6.0; 7.0 and 8.0, and tested in accordance with methods standardized by World Health Organization. The results obtained indicated that the minor concentration of the latex occurred at pH 6.0 (LC90 = 3.2 µl/l) and the maximum at pH 8.0 (LC90 = 10.3 µl/l). Lethal concentrations adjusted for pH 5.0 and 7.0 were 3.4 µl/l and 4,7µl/l, respectively. From the results it could be concluded that the molluscicidal toxicity was not altered when the concentrations were adjusted for pH 5.0 and 6.0, as we observed that mortality rate was 100% starting at a concentration of 2.0 µl/l, not the same for the concentrations with adjustment for pH 7.0 and 8.0.

scholarly journals Molluscicidal Activity of Some Cyanide Derivatives

2014 ◽  
Vol 26 (22) ◽  
pp. 7837-7842
Author(s):  
Ahmed S. Abdel-Aty ◽  
Ahmed Abdel-Megeed
Keyword(s):  
Molluscicidal Activity
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