scholarly journals Molluscicidal Activity of Natural Products. The Effect of Solanum Glycosidic Alkaloids on Lymnaea cubensis Snails

1969 ◽  
Vol 65 (1) ◽  
pp. 69-72
Author(s):  
Arnaldo Alzérreca ◽  
Bolívar Arboleda ◽  
Georgina Hart
Keyword(s):  
Natural Products ◽  
Puerto Rico ◽  
Crude Extract ◽  
Progressive Increase ◽  
Snail Host ◽  
Intermediate Snail Host ◽  
Preliminary Results ◽  
Solanum Mammosum ◽  
Molluscicidal Activity

The progressive increase of bovine fascioliasis in Puerto Rico demands the control of the population of the intermediate snail host. This report deals with preliminary results of the effect of extracts of Solanum mammosum fruits on Lymnaea cubensis snails. The methanolic crude extract shows 95% molluscicidal activity at 25 p/m. One component of the active extract was identified as solasod-5-en-3ß-ol (solasodine).

scholarly journals Isolation of a Novel Polyketide from Neodidymelliopsis sp.

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3235
Author(s):  
Melissa M. Cadelis ◽  
Hugo Gordon ◽  
Alex Grey ◽  
Soeren Geese ◽  
Daniel R. Mulholland ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Natural Products ◽  
Ambient Temperature ◽  
Crude Extract ◽  
Structure Elucidation ◽  
Fungal Pathogens ◽  
Spectroscopic Techniques ◽  
Bioactive Natural Products

Fungi have become an invaluable source of bioactive natural products, with more than 5 million species of fungi spanning the globe. Fractionation of crude extract of Neodidymelliopsis sp., led to the isolation of a novel polyketide, (2Z)-cillifuranone (1) and five previously reported natural products, (2E)-cillifuranone (2), taiwapyrone (3), xylariolide D (4), pachybasin (5), and N-(5-hydroxypentyl)acetamide (6). It was discovered that (2Z)-cillifuranone (1) was particularly sensitive to ambient temperature and light resulting in isomerisation to (2E)-cillifuranone (2). Structure elucidation of all the natural products were conducted by NMR spectroscopic techniques. The antimicrobial activity of 2, 3, and 5 were evaluated against a variety of bacterial and fungal pathogens. A sodium [1-13C] acetate labelling study was conducted on Neodidymelliopsis sp. and confirmed that pachybasin is biosynthesised through the acetate polyketide pathway.

scholarly journals Screening of natural product extracts for fly repellent and larvicide

2021 ◽  
Vol 20 (1) ◽  
pp. 25-40
Author(s):  
Kanokwan Bootyothee ◽  
◽  
Surasit Aunpromma ◽  
Atchara Artchayasawat ◽  
Opal Pitaksakulrat ◽  
...  
Keyword(s):  
Natural Products ◽  
Mortality Rate ◽  
Crude Extract ◽  
Rural Areas ◽  
Inorganic Compounds ◽  
Food Contamination ◽  
Positive Control ◽  
Positive Control Group ◽  
Control Group ◽  
Significant Difference

Fly is one of the vectors of foodborne pathogenic vectors and causes myiasis in humans and animals. To prevent the contamination of food and myiasis, various chemical products are commonly used. However, eco-friendly is now a trend all over the world so natural products are the alternative ways to reduce the chemical residue in the environment. The present study was screened the 12 natural products in 4 groups; the essential oil plants, the alkaloid plants, the cyanogenic plant, and the inorganic compounds which use a simple extraction on the fly repelling and larvicide. The fly repelling efficacy with 2 criteria consist of the time of the first swarm and percent repelling (PR) in the first 15 min. The larvicidal efficacy was determined by the mortality rate within 24 h. The Kaffir lime peels aqueous crude extract exhibited the best result on fly repelling from both criteria with no significant difference. The bamboo shoots aqueous crude extract gave the best result on larvicide with significantly different from other groups (P < 0.001) which was faster than the positive control group (Coumaphos & Propoxur). Moreover, the high mortality rate reached 73.33 ± 15.28% within 24 h, higher than the positive control group. The present study indicates the power of common natural products on fly repellent and larvicide that may apply for fly repellant to reduce the food contamination especially fresh materials and prevention or treatment of animal and human myiasis in rural areas

Parasite prevalence in an intermediate snail host is subject to multiple anthropogenic stressors in a New Zealand river system

2016 ◽  
Vol 60 ◽  
pp. 845-852 ◽  
Author(s):  
Heidi Hofmann ◽  
Isabel Blasco-Costa ◽  
Rune Knudsen ◽  
Christoph D. Matthaei ◽  
Amanda Valois ◽  
...  
Keyword(s):  
New Zealand ◽  
River System ◽  
Parasite Prevalence ◽  
Snail Host ◽  
Intermediate Snail Host ◽  
Anthropogenic Stressors
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