Latex coatings containing antifeedants: Formulation, characterization, and application for protection of conifer seedlings against pine weevil feeding

Harmful Effects on Oryzaephilus surinamensis (L.) and Tribolium castaneum by Food Grade Antioxidants and their Formulations in Peanut Kernel

“…As for O. surinamensis affected by BHA, microcapsule ingredients could help to the decreased T. castaneum body weight, giving specific properties of the capsules coating. This result is agreed with Shtykova et al [11] and Garcia et al [9] which founded an increase of insecticidal effect when these antioxidants were microencapsulated and evaluated against pine weevil (H. abietis) and O. surinamensis, respectively. Besides, Patil and Jadhav [27] founded change in mean body weight on the larval of Helicoverpa armigera when they fed leaves treated with 2000 Um/L of chitinase, where until day 7 insects showed a retarded in body mass.…”

“…Also, Barra et al [8] founded that free BHA and BHT and the mixture of them (20 mM concentration) produced a high mortality against Sitophilus zeamais, Tribolium confusum and Rhyzopertha dominica after 120 days of incubation. Shtykova et al [11] could to establish a complete inhibition of feeding on pine weevil (Hylobious abietis) with BHT microcapsules containing Eudragit copolymer and surfactant. However, in our work, a dual effect was observed of microencapsulated antioxidants; on the one hand F-BHA and F-BHT had the best insecticidal effect by reducing the LT 50 value in O. surinamensis and T. castaneum respectively; but on the other hand the LD 50 was more than double but always without exceeding the limits allowed of these antioxidants in peanut (200 μg/g of peanut oil).…”

“…Many studies reported a high anti-feedant activity in insects using extracts of leaves and stems, essential oils, antioxidants, commercial insecticides and chemical compounds [28][29][30][31][32][33][34]. Particularly, Shtykova et al [11], could establish an anti-feedant activity close to 1 (complete inhibition of feeding) on pine we evil with BHT microcapsules containing Eudragit copolymer and surfactant.…”

“…Some works have demonstrated butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT) (phenolic antioxidants) effectiveness against toxigenic molds and these storage pests [10,11]. However, analysis of antioxidant residual levels in stored peanuts showed a fast reduction of these substances, probably due to the environmental and biological factor interactions [12].…”

Epidihydropinidine, the main piperidine alkaloid compound of Norway spruce (Picea abies) shows promising antibacterial and anti-Candida activity

“…Norway spruce needles and young stems contain a number of small molecular mass piperidine alkaloids, epidihydropinidine and cis-pinidinol being the most abundant ones [55,56,61]. Piperidine alkaloids in conifers are thought to be insect antifeedants but have also been reported to be toxic and teratogenic in a frog embryo test [61,62,63]. Less is known about their possible role as antifungals and antibacterials.…”