Impact of aqueous extracts of Cassia occidentalis, Eucalyptus camaldulensis and Hyptis suaveolens on the entomofauna and the seed yield of Gossypium hirsutum at Boklé (Garoua, Cameroon)

Impact of Plant Extracts on the Pollination Activity of <i>Apis mellifera</i> Linnaeus, 1758 (Hymenoptera: Apidae) on Flowers of Cowpea Variety Feekem, in Dang (Adamaoua, Cameroon)

“…In Cameroon, the cowpea annual production is low and occupies the eighth position among the main African cowpea producing countries, with an annual production estimated as 156.2 tones per year [10]. In African countries, the cowpea production is limited by several factors [5], among which the shortage of agricultural land, the low soil fertility, the poor management of pollinating insects, the pressure from insect pests in the fields and the post-harvest looses in warehouses, are frequently reported [5,11]. Fields and warehouses pests control is mainly based on the spraying of approved synthetic insecticides [12,13], which have proven their harmful effect to humans, livestock, the environment in general and the beneficial insects in particular [14].…”

“…A. Gray, 1883 (Asterales: Asteraceae) [11,14]. Floricultural entomofauna of V. unguiculata is well documented in cowpea producing countries in general and more particularly in Benin [34], in Ghana [35], in Nigeria [36], and in Cameroon [19,23,37].…”

“…mellifera are frequently recorded on the cowpea flowers. In Cameroon, although many natural additives based on plant extracts have proven effective against harmful insects [11,14,38], their effects on pollinating insects in particular Ap. mellifera remains less known and it is necessary to carry out studies in the Adamaoua Region (Cameroon) on the effect of local plants on the foraging behavior of Ap.…”

Seed Yield Improvement in Vigna unguiculata (L.) (Fabaceae): Efficiency of Pollinators and Impact of Aqueous Leaf Extract of Three Plant Species in North Cameroon

“…The relationships between floricultural plants and their pollinators have been intensively studied in Cameroon [3,16]. However, in the northern savannah region of the country, despite the diversified flora and a flourishing market gardening activity, there is very little information on the insecticidal potential of the local plant species extracts against pest insects [17], except few works, for example those on leaf extract of Gnidia kaussiana Meisner (Myrtyales: Thymeleaceae) and Ocimum canum Sims, 1824 (Lamiales: Lamiaceae) against Callosobruchus maculatus (Fabricius, 1775) (Coleoptera: Chrysomelidae) [18] and that on aqueous extracts of Cassia occidentalis L. (= Senna occidentalis (L.) Link, 1829), Eucalyptus camaldulensis Dehnh., 1832 and Hyptis suaveolens (L.) Poit., 1806 on the entomofauna and the seed yield of Gossypium hirsutum L., 1753 [19]. In short, nothing is said about the insecticidal aptitude of common wild plant species, easily accessible and exploitable as botanical pesticides against crop pests, able to replace synthetic pesticides.…”

Aqueous botanical extracts, via different extraction methods, for control of the diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae)

“…An updated review shows that 95 plant species have their extracts with insecticidal activity, which can be used as "bio-insecticides", with Azadirachta indica A. Botanical insecticides can be prepared from spontaneously growing plants, available locally, and which may even offer new mechanisms of action, presenting an interesting cost/bene t ratio and with ecologically correct alternatives in relation to synthetic agrochemicals, preserving the pollinator population, as well as ecosystem diversity (Kudom et Adamou et al 2022). These substances, when in contact with insects, can inhibit feeding, interfere with the synthesis of ecdysis (ecdysonium), cause deformations in pupae, kill immature individuals and adults, in addition to reducing the fecundity and longevity of many species (Schmutterer 1988;Mordue and Blackwell 1993).…”