A review of biological activities and phytochemistry of Rhus species

SA Opiyo, PW Njoroge, EG Ndirangu, KM Kuria - 2021 - repository.mut.ac.ke
The genus Rhus (family: Anacardiaceae, order: Sapindales) consists of more than 250
species distributed in the tropics, subtropics and temperate regions. Traditionally, extracts …

Chemical composition and repellency of Nigella sativa L. seed essential oil against Anopheles gambiae sensu stricto

EG Ndirangu, S Opiyo… - Trends in Phytochemical …, 2020 - tpr.shahrood.iau.ir
Malaria which is caused by the Plasmodium parasite and transmitted through bites of
infected female Anopheles mosquitoes is an important public health concern in Africa. Insect …

A review pesticidal activity of essential oils against Sitophilus oryzae, Sitophilus granaries and Sitophilus zeamais

SA Opiyo, PW Njoroge, EG Ndirangu - 2022 - repository.mut.ac.ke
Infestation of cereals in storage by Sitophilus oryzae, Sitophilus granaries and Sitophilus
Zeamais lead to great food loses in Sub-Saharan Africa. Some of the synthetic pesticides …

Antimicrobial activity of root bark extracts of Rhus natalensisa and Rhus ruspolii

PW Njoroge, SA Opiyo - 2019 - repository.mut.ac.ke
Bacteria and fungi are frequent causes of serious opportunistic infections worldwide.
Several effective antibiotic drugs are in the market. However, drug-resistance, side effects …

A review of 13C NMR spectra of drimane sesquiterpenes

SA Opiyo - 2019 - repository.mut.ac.ke
Drimane sesquiterpenes are important group of phytochemicals with a wide range of
medicinal properties including antibacterial, antifungal, anti-inflammatory, antioxidant …

Chemical composition and biological activity of extracts from Conyza species

SA Opiyo, PW Njoroge, KM Kuria - 2023 - repository.mut.ac.ke
The genus Conyza (Asteraceae) comprises about 50 species and found in the tropical and
warm regions. Extracts from Conyza species have numerous pharmacological applications …

Evaluation of Warburgia ugandensis extracts and compounds for crop protection against Prostephanus truncates

SA Opiyo - 2020 - repository.mut.ac.ke
Insect pests cause a significant loss of maize production in Africa. Maize weevil (Sitophilus
zeamais Motchulsky) and the larger grain borer (Prostephanus truncatus Horn) are the most …

Insecticidal activity of Ocimum Suave willd extracts and compounds against Sitophilus Zeamais Motschulsky

SA Opiyo - 2020 - repository.mut.ac.ke
Insect pests cause significant loss of maize production in Africa. Among pests of maize,
beetles are the most important, with the maize weevil (Sitophilus zeamais Motsch.) and the …

A review of fatty acid components in avocado

SA Opiyo, BJ Mugendi, PW Njoroge, SN Wanjiru - 2023 - repository.mut.ac.ke
Avocado is one of the world's most economically significant tropical fruit crops. In recent
years, there has been a lot of interest in avocado as a natural functional food in due to its …

Insecticidal activity of Elaeodendron schweinfurthianum extracts and compounds against Sitophilus zeamais Motschulsky

SA Opiyo - 2020 - repository.mut.ac.ke
Agricultural production is constrained by pests which cause serious post-harvest losses in
African. Maize weevil (Sitophilus zeamais Motschulsky) is one of the most destructive insect …