The larvicidal efficacy of Vernonia cinerea leaf extracts against the common filarial vector, Culex quinquefasciatus was determined. Ground Vernonia cinerea leaves were sequentially extracted with ethyl acetate, chloroform, acetone and methanol. A series of concentrations of the extracts ranging from 0.05 – 2 mg/ml were tested against third instar larvae using WHO protocol and their percentage ...

Plants have evolved sophisticated mechanisms to sense and respond to pathogen attacks. Resistance against necrotrophic pathogens generally requires the activation of the jasmonic acid (JA) signaling pathway, whereas the salicylic acid (SA) signaling pathway is mainly activated against biotrophic pathogens. SA can antagonize JA signaling and vice versa. Here, we report that the necrotrophic path...

The Botrytis cinerea homolog (Bc-hch) of Nc-het-c and Pa-hch (vegetative incompatibility loci of Neurospora crassa and Podospora anserina respectively) was cloned and sequenced. The gene structure of Bc-hch is very close to those of Nc-het-c and Pa-hch. A PCR-RFLP approach on a 1171 bp fragment was used to screen polymorphism at this locus among 117 natural isolates of B. cinerea. Restriction p...

Botrytis cinerea, the causative agent of gray mold disease, is an aggressive fungal pathogen that infects more than 200 plant species. Here, we show that some B. cinerea small RNAs (Bc-sRNAs) can silence Arabidopsis and tomato genes involved in immunity. These Bc-sRNAs hijack the host RNA interference (RNAi) machinery by binding to Arabidopsis Argonaute 1 (AGO1) and selectively silencing host i...

AIMS To develop selective media for the enumeration of Botrytis cinerea. METHODS AND RESULTS Two new media, Botrytis Selective Medium (BSM) and Botrytis Spore Trap Medium (BSTM), were developed and compared with currently available media for the enumeration of B. cinerea conidia from the environment. The new Botrytis media proved advantageous over previous media because they were easier to pr...

Despite the described central role of jasmonate signaling in plant defense against necrotrophic pathogens, the existence of intraspecific variation in pathogen capacity to activate or evade plant jasmonate-mediated defenses is rarely considered. Experimental infection of jasmonate-deficient and jasmonate-insensitive Arabidopsis thaliana with diverse isolates of the necrotrophic fungal pathogen ...

The present study was undertaken to investigate the effectiveness of the ethanolic extract of Echinophora platyloba DC. on Candida albicans. Using the agar dilution method, the growth condition of standard Candida albicans ATCC 10231, cultured on the media containing plant extracts at different concentrations (1,2,4,8,16,32,64,128 and 256 mg/ml) was studied. The results were recorded twenty one...

The present study was undertaken to investigate the effectiveness of the ethanolic extract of Echinophora platyloba DC. on Candida albicans. Using the agar dilution method, the growth condition of standard Candida albicans ATCC 10231, cultured on the media containing plant extracts at different concentrations (1,2,4,8,16,32,64,128 and 256 mg/ml) was studied. The results were recorded twenty one...

  Background: Essential oils and various extracts from plant are of great interests in the industry and scientific research.   Objective: This study was designed to examine the chemical composition of essential oil and of Echinophora platyloba from Iran.   Method: The chemical composition of the hydrodistilled essential oil of the air-dried aerial parts of Echinophora platyloba growing wild in ...