ChemInform Abstract: Callistrilones A and B, Triketone-Phloroglucinol-Monoterpene Hybrids with a New Skeleton from Callistemon rigidus.

ChemInform ◽  
2016 ◽  
Vol 47 (20) ◽  
Author(s):  
Jia-Qing Cao ◽  
Xiao-Jun Huang ◽  
Yu-Ting Li ◽  
Ying Wang ◽  
Lei Wang ◽  
...  
Keyword(s):  
Callistemon Rigidus

scholarly journals Expanded Range of Cylindrocladium colhounii in the United States

Plant Disease ◽  
1997 ◽  
Vol 81 (11) ◽  
pp. 1333-1333 ◽  
Author(s):  
N. E. El-Gholl ◽  
T. S. Schubert ◽  
S. E. Walker ◽  
J. K. Stone
Keyword(s):  
Room Temperature ◽  
The United States ◽  
Ornamental Plant ◽  
Leaf Spots ◽  
Leaf Surfaces ◽  
Symptomatic Tissue ◽  
First Time ◽  
Gaultheria Procumbens ◽  
Callistemon Rigidus ◽  
The U.S

Plant pathologists in Florida and Oregon have recently found Cylindrocladium colhounii for the first time on two new ornamental plant species. Brown, pinpoint leaf spots were observed on Callistemon rigidus (stiff bottlebrush) in a Florida nursery. C. colhounii was isolated consistently from these lesions. To confirm Koch's postulates, 25 ml of aconidial suspension at 96,000 conidia per ml was used to spray a 38.1-cm branch of C. rigidus. Plants were maintained in a moist chamber at room temperature (25 ± 2°C). Symptoms appeared within 3 days, and included brown, pinpoint spots (1 mm or less) occurring on both leaf surfaces, sunken blotches, and blight. The fungus was consistently reisolated from symptomatic tissue. In Oregon, the first detection of C. colhounii was from leaf spots on Gaultheria procumbens (wintergreen) in a nursery. No proof of pathogenicity was done in Oregon on G. procumbens. C. colhounii has now been reported on 14 host genera in 10 families from Australia, India, Mauritius, South Africa, and the U.S. (FL, HI, LA, NC, OR, SC) (1–4). References: (1) P. W. Crous and M. J. Wingfield. Mycopathologia 122:45, 1993. (2) A. Peerally. Mycotaxon 40:323, 1991. (3) A. Y. Rossman. Mycol. Pap. No. 150, Commonw. Mycol. Inst., Kew, Surrey, England, 1983. (4) J. Y. Uchida and M. Aragaki. Plant Dis. 81:298, 1997.

scholarly journals In vivo anthelmintic activity of Callistemon rigidus ethanolic extract on Haemonchus contortus in goats

2020 ◽  
Vol 02 (03) ◽  
pp. 103
Author(s):  
Yongwa Gilbert ◽  
Ndjonka Dieudonné ◽  
Belga Francois Ngnodandi Francois Ngnodandi
Keyword(s):  
Haemonchus Contortus ◽  
Anthelmintic Activity ◽  
Ethanolic Extract ◽  
Callistemon Rigidus

Anti-staphylococcal potential of Callistemon rigidus

Open Medicine ◽  
2007 ◽  
Vol 2 (1) ◽  
pp. 79-88 ◽  
Author(s):  
Charu Gomber ◽  
Sanjai Saxena
Keyword(s):  
Staphylococcus Aureus ◽  
Drug Targets ◽  
Therapeutic Potential ◽  
Higher Plants ◽  
Multidrug Resistant ◽  
Drug Formulation ◽  
Health Crisis ◽  
Antistaphylococcal Activity ◽  
Callistemon Rigidus

AbstractThe last decade witnessed the emergence of Staphylococcus aureus- a versatile human pathogen, as a deadly superbug. The enormous genetic plasticity of the organism assists it to endlessly evolve resistance mechanisms against existing anti-infectives thus necessitating the need to control the spread of resistant staphylococcal isolates in hospitals and health care settings. This in turn demands the incessant exploration of newer biological matrices in search of diverse chemical entities with novel drug targets. Since time immemorial higher plants continue to be the best source of newer compounds with high therapeutic potential. Lead fractions from same or different plants can be developed into effective antibacterial polyherbal formulations. A lead fraction from methanolic extract of leaves of Callistemon rigidus exhibited a dose dependent antistaphylococcal activity during in vitro agar well assay against a panel of twenty seven clinical multidrug resistant S. aureus isolates. Further, minimal inhibitory concentration (MIC) evaluation by in vitro 96-well microplate based assay established a MIC range of 1.25–80 μg/ml as compared to 5–320 μg/ml of positive control, Cefuroxime sodium. The MIC50 and MIC90 of the methanolic lead fraction were 5 μg/ml and 40 μg/ml respectively. The present study thus signifies the vast potential of the lead fraction from Callistemon rigidus for future development into a herbal drug/ formulation and to impede global health crisis due to multidrug resistant Staphylococcus aureus.

scholarly journals INVESTIGATIONS INTO THE ANTIMICROBIAL ACTIVITY OF METHANOL LEAF EXTRACT OF CALLISTEMON RIGIDUS

2013 ◽  
Vol 2 (9) ◽  
pp. 51-53
Author(s):  
Ikegbunam M N ◽  
Onyia R C ◽  
West O P ◽  
Anagu L O ◽  
Anyaneme C O
Keyword(s):  
Antimicrobial Activity ◽  
Leaf Extract ◽  
Callistemon Rigidus

scholarly journals Combined Effect of Methanol Extracts and Essential Oils of Callistemon rigidus (Myrtaceae) and Eucalyptus camaldulensis (Myrtaceae) against Anopheles gambiae Giles larvae (Diptera: Culicidae)

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Lame Younoussa ◽  
Francine Kenmoe ◽  
Mallam Kary Oumarou ◽  
Aurore Christelle Sengue Batti ◽  
Joseph Lebel Tamesse ◽  
...  
Keyword(s):  
Essential Oils ◽  
Anopheles Gambiae ◽  
Mosquito Control ◽  
Tap Water ◽  
Eucalyptus Camaldulensis ◽  
Control Program ◽  
Positive Control ◽  
Negative Control ◽  
Mammalian Toxicity ◽  
Callistemon Rigidus

Biopesticides from botanicals are nowadays actively encouraged in the mosquito control program because of their low mammalian toxicity, biodegradability, and target specificity. However, leaf methanolic extracts and essential oils of Callistemon rigidus and Eucalyptus camaldulensis were evaluated individually and in combination on third- and fourth-instar larvae of Anopheles gambiae. The extracts were tested individually and in combination at doses of 125, 250, 500, and 1000 ppm while essential oils were applied at 25, 50, 100, and 200 according to the standard protocol of WHO. The commercial insecticide Bi-one tested at the recommended dose of 1000 ppm was used as positive control while the solution of tap water containing 0.5 ml of methanol was used as negative control. The mortality of the larvae was recorded after 24 h postexposure. In the results, 100% mortality of the larvae was recorded with the extracts of C. rigidus and the combinations E50% : C50% and E25% : C75% of the plants as well as positive control (1000 ppm). Similarly, essential oils of the two plants and their combinations caused 100% mortality of the larvae. Among the various combinations of the extracts and essential oils, only the combination E75% : C25% of essential oils presented a synergistic effect. Therefore, the essential oil combination (E75% : C25%) of the plants E. camaldulensis and C. rigidus is recommended in order to promote the its use in the form of natural biocide in the implementation of effective insect controls against the mosquito larvae, vector of malaria.

scholarly journals Aloe ferox and Callistemon rigidus

2011 ◽  
Vol 1 (2) ◽  
pp. 53-53
Author(s):  
Ian Cock
Keyword(s):  
Aloe Ferox ◽  
Callistemon Rigidus
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