Brazilian forest producers have developed integrated management programs to increase the effectiveness of control leaf-cutting ants genera Atta and Acromyrmex. These measures reduced costs quantity insecticides used in plantations. Such are based on monitoring ant nests, as well need timing methods. Chemical employing baits is most commonly method, however, biological, mechanical cultural methods, besides plant resistance, can reduce chemicals applied

Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) is a serious pest of corn in several American countries. It mainly controlled with synthetic insecticides. The objectives this study were to evaluate the effects natural products, neem oil and pyroligneous extract, insecticide, lufenuron, at 2.50mL water (0.25 %) on mortality 2-, 4- 6-day-old caterpillars S. frugiperda, their selectivities against fourth instar larvae Eriopis connnexa Germar (Coleoptera: Coccinellidae). Four- showed higher...

Pentatomid stinkbugs are important predators of defoliating caterpillars in agricultural and forestry systems, knowledge the impact insecticides on natural enemies is information for integrated pest management (IPM) programs. Thus, we assessed toxicity behavioral sublethal response Podisus nigrispinus Supputius cincticeps exposed to deltamethrin, methamidophos, spinosad chlorantraniliprole, commonly used control velvetbean caterpillar (Anticarsia gemmatalis) soybean crops. With exception...

Pre-oral digestion is described as the liquefaction of solid tissues prey by secretions predator. It uncertain if pre-oral means dispersion food or true in sense stepwise bond breaking polymers to release monomers be absorbed. Collagenase only salivary proteinase, which activity significant (10%) relation Podisus nigrispinus midgut activities. This suggests that P. consists tissue dispersion. was confirmed finding muscles fibers inside midguts. Soluble hydrolases from were partially purified...

Abstract Entomopathogenic nematodes (EPNs) (Steinernematidae and Heterorhabditidae) can control pests due to the mutualistic association with bacteria that kill host by septicemia make environment favorable for EPNs development reproduction. The diversity of in Brazilian soils requires further study. identification EPNs, adapted environmental climatic conditions cultivated areas is important sustainable pest suppression integrated management programs agricultural Brazil. objective was...

The stingless bee Partamona helleri plays a role in pollinating both native and cultivated plants the Neotropics. However, its populations can be reduced by pyrethroid insecticide lambda-cyhalothrin. This compound may cross intestinal barrier circulate through hemolymph, affecting various non-target organs. aim of present study was to assess extent cellular damage midgut resulting oxidative stress caused lambda-cyhalothrin P. workers. Bees were orally exposed lethal concentration at which...

The social wasps are predators of many insect species and the study their preys can reveal potential these natural enemies in biological control programs. A total 240h collections 32 nests Polistes versicolor (Olivier) was carried on Juiz de Fora, Minas Gerais State, Brazil, from March 2000 to February 2001. captured by P. were mainly those orders Lepidoptera (95.4%) Coleoptera (1.1%) while 3.4% them not identified. Chlosyne lacinia saundersii Doubleday & Hewitson (Lepidoptera: Nymphalidae)...

The objective of this work was to evaluate the impact integrated pest management (IPM) in productivity tomato and populations leafminers, fruit borers, natural enemies crops. treatments were calendar (spraying twice weekly with insecticides fungicides), IPM when action thresholds achieved), control (no pesticide applied). most efficient system due presenting similar 65.6% less applications than calendar. attack Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) Liriomyza spp. (Diptera:...

The effect of the defense prey Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) on predation rates Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) females was studied. P. preyed 1.0, 1.4, 1.2, 3.8 and 3.0 0.4, 0.8, 1.6, 2.8 3.2 third instars S. larvae with without defense, respectively, densities one, two, four, six eight larvae. attack rate manipulation time were, 0.67 ± 0.39-h 6.72 2.88 h for fed 2.51 0.16-h 0.51 0.77 those defense. functional response predator varies...

Abstract Brontocoris tabidus (Signoret) (Heteroptera: Pentatomidae) is an obligate zoophytophagous predator because its population can be maintained in the laboratory when fed on both prey and plants. We evaluated ultrastructural changes midgut digestive cells of adult B. tabidus, subjected to different treatments (starvation or feeding plant material prey) for periods. Their midguts were dissected, divided into anterior, medium posterior sections, processed, analyzed with light transmission...

Interactions of the parasitoids Palmistichus elaeisis Delvare & LaSalle and Trichospilus diatraeae Cherian Margabandhu (Hymenoptera: Eulophidae) with its alternative host Anticarsia gemmatalis (Hübner) (Lepidoptera: Noctuidae) affect success or failure mass production these for use in integrated pest management programs. The aim this study was to evaluate changes cellular defense encapsulation ability A. pupae against P. T. adult parasitoid densities 1, 3, 5, 7, 9, 11 13 parasitoids/pupae....

Abstract BACKGROUND The rice weevil, Sitophilus oryzae (L., 1763) (Coleoptera: Curculionidae), is a stored grain/seed pest of several crops. Botanicals represent an option to manage this pest, especially those with high toxicity determined by its structure and physicochemical properties low residue left behind on treated grains/seeds. Enantiomers are bioactive molecules in organic processes. aim study was evaluate the insecticidal activity two enantiomeric forms monoterpenes citronellal,...

Abstract Honeybees (Apis mellifera L.) (Hymenoptera: Apidae) coexists with humans in urban habitats foraging, mainly, sources containing carbohydrates. The behavior and risks for bees using soft drinks their diet are poorly studied. time spent by bee workers visiting drink leftovers plastic cups its death were evaluated. Bee more (200 mL) than flowers of Schinus sp. (Anacardiaceae), Anadenanthera (Fabaceae), Vernonia (Asteraceae), Citrus sinensis L. (Rutaceae) Cissus rhombifolia Vahl...

The zoning of protected areas reduces the environmental impacts caused by recreational use such locations. Thus, this study aims to develop a predictive model fragility support ecotourism planning. A Geographic Information System were used produce thematic maps slope, soil type, precipitation, flow accumulation, and land cover, which then overlaid generate map. results showed that 73.6% Serra Negra da Mantiqueira State Park 72.7% Private Reserve lie within moderate class, followed high...