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Plant compounds insecticide activity against Coleoptera pests of stored products

TLDR
The objective of this work was to isolate, identify and assess the bioactivity of insecticide compounds present in these plants, against Coleoptera pests of stored products: Oryzaephilus surinamensis L. (Silvanidae), Rhyzopertha dominica F. (Bostrichidae) and Sitophilus zeamais Mots (Curculionidae).
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Compounds from Ageratum conyzoides: isolation, structural elucidation and insecticidal activity.

TLDR
The complete assignment of (13)C NMR to 5,6,7,8,3'-pentamethoxy-4', 5'-methylenedioxyflavone was successfully made for the first time and did not show any insecticidal activity against the four insect species tested.
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HOSTING CAPACITY OF HORTICULTURAL PLANTS FOR INSECT PESTS IN BRAZIL

TLDR
The objective of this research was to study the hosting capacity for pests of Abelmoschus esculentus (L.), Brassica oleracea L. vars, and Brevicoryne brassicae (L.) and the role of polyculture, crop rotation, and neighboring plants.
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Sinoxylon anale Lesne, 1897 (Coleoptera, Bostrichidae) new record for the Venezuelan fauna.

Lethal and Behavioral Effects of Amazonian Plant Extracts on Leaf-Cutting Ant ( Hymenoptera : Formicidae ) Workers

Leaf-cutting ants are economically important pests in neotropical agricultural and forestry ecosystems. The present study aimed to assess the effect of extracts of six amazonian plants (Banara…

Standardized sampling plan for Aphis gossypii based on the cotton cultivar, plant phenology and crop size

TLDR
A standardized sampling plan is developed for A. gossypii as a function of cotton cultivar, plant phenology and field size and the best sampling technique was direct counting, which strongly depends on the size of the cotton field.
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Whitefly population dynamics in okra plantations

TLDR
No significant effects of the plant canopy on whitefly eggs and adults distribution were found and plants senescence and natural enemies, mainly Encarsia sp.
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Whitefly, aphids and thrips attack on cabbage

TLDR
Investigation of the relationships between predators and parasitoids, leaf chemical composition, levels of leaf nitrogen and potassium, total rainfall, relative humidity, daylight and median temperature on the intensity of whitefly, aphid, and thrips attack on cabbage found that median temperature can increase whitefly and thrive populations.
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Toxicity of Leaf Extracts of Ageratum conyzoides to Lepidoptera Pests of Horticultural Crops

TLDR
The hexane and alcohol extracts of the plants Ocimum selloi B., Ruta graveolens L., Leonotis nepetaefolia L., Datura stramonium L., Cordia verbenaceae L., Mentha piperita L., Mormodica charantia L. and Ageratum conyzoides L. were tested against larvae of Diaphania hyalinata (L.) and showed biological activity.
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Bemisia tabaci, Brevicoryne brassicae and Thrips tabaci abundance on Brassica oleracea var. acephala

TLDR
A tendency in the reduction of aphids and thrips populations with increase in total rainfall was observed, and natural enemies, especially the parasitoid Adialytus spp.
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