the study focused on the analysis of production and marketing constraints of tomato among rural farmers in talensi nabdam district of upper east region of ghana.a total of 100 respondents were interviewed using questionnaire. data was analyzed using descriptive statistics to describe the socio economic characteristics of the farmers and kendall’s coefficient of concordance was used to rank the ...

Abstract Background Effects of entomopathogenic fungi (EPF); Beauveria bassiana , Isaria fumosorosea and Pupureocillium lilacinum against tomato leafminer, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), which is one the most economic pests tomato, were investigated in Petri dish, pot greenhouse experiments. Commercial bioinsecticide Met 52 was also used In dish trials, I. applied to third ...

Spider venoms are composed, among other substances, of peptide toxins whose selectivity for certain physiological targets has made them powerful tools applications such as bioinsecticides, analgesics, antiarrhythmics, antibacterials, antifungals and antimalarials, others. Bioinsecticides an environmentally friendly alternative to conventional agrochemicals. In this paper, the primary structure ...

With the development of sensitive molecular techniques for detection of low levels of asymptomatic pathogens, it becoming clear that vertical transmission is a common feature of some insect pathogenic viruses, and likely to be essential to virus survival when opportunities for horizontal transmission are unfavorable. Vertical transmission of Spodoptera exigua multiple nucleopolyhedrovirus (SeMN...

Crystal toxin Cry1Ca from Bacillus thuringiensis has an insecticidal spectrum encompassing lepidopteran insects that are tolerant to current commercially used B. thuringiensis crops (Bt crops) expressing Cry1A toxins and may be useful as a potential bioinsecticide. The mode of action of Cry1A is fairly well understood. However, whether Cry1Ca interacts with the same receptor proteins as Cry1A r...

Data in the literature have shown that treatment with caffeine (CAF) blocks development and causes death of Aedes aegypti (Ae. aegypti), in the larval stage. Since adults are not produced, CAF was considered a potential bioinsecticide, useful for controlling these mosquitoes that transmit human viral diseases. Similar results were obtained in tests with used coffee grounds (UCG). Considering th...

The use of Bacillus thuringiensis (Bt) strains with high insecticidal activity is essential for the preparation of bioinsecticide. In this study, for 60 Bt strains isolated in Taiwan, their genotypes and the correlation of some cry genes as well as the expression levels of cry1 genes, with their insecticidal activities against Plutella xylostella, were investigated. Pulsed field gel electrophor...

The red palm weevil, Rhynchophorus ferrugineus, is of great concern worldwide, especially in the Middle East, where dates are a strategic crop. Despite their ecological hazard, insecticides remain the most effective means of control. A bioinsecticide of bacterial origin, spinosad is effective against several pests, and its efficacy against male R. ferrugineus was assessed in the present study. ...

The bacterium Bacillus thuringiensis (Bt) produces parasporal crystals containing delta-endotoxins responsible for selective insecticidal activity on larvae. Upon ingestion, these crystals are solubilized in the midgut lumen and converted into active toxins that bind to receptors present on the microvilli causing serious damage to the epithelial columnar cells. We investigated the effect of the...