The aim of this study was to verify the spatial and temporal behavior of corn leaf aphid (Rhopalosiphum maidis Fitch.) and hoverflies in corn crop in the municipality of Igarapé-Açu, northeast of Pará, Brazil, as well as the influence of adjacent areas on the occurrence of these insects. An experimental area of 1.0 ha (100 x 100 m) was used in the years 2015 and 2016, adjacent areas consisted of mango agroecosystem, pasture and secondary forest. The area was divided into grid with 100 plots of 100 m² (10 x 10 m). Ten plants were randomly selected, totaling 1,000 plants per sampling date. Corn leaf aphid colonies (= or> 15 aphid) and syrphid flies adult was visually analyzed throughout the aerial parts of the plants. The spatial behavior was analyzed by semivariogram modeling and kriging interpolation maps. The semivariograms and kriging maps were made by the R software for Windows. Gaussian, spherical and exponential models were the best fit for corn leaf aphid in both harvests, showing aggregate behavior. The strong and moderate spatial dependence index prevailed, with range ranging from 12.46 to 93.04 m for R. maidis. The syrphids flies showed spatial interaction with the corn leaf aphid and they also show aggregate behavior, confirmed by most adjustments in the spherical and exponential models. The spatial dependence index of the prevailing syrphids flies were moderate and weak, ranging from 14.00 to 101.33 m. Adjacent areas showed influence on occurrence and dispersal of both corn leaf aphid and syrphids flies.

Taxonomic identification is essential in the field of forensic entomology. Insects are important in the decomposition of cadavers. The flies are generally attracted to cadavers and one of the most important contributions is to estimate the postmortem interval. The scanning electron microscopy (SEM), which allows rapid and accurate identification of different species of forensics flies, has been highlighted as it allows better visualization of the external morphology of immature and some adults. The purpose of this study was to examine in details the morphological aspects of sensilla on the antennae of female and male of Xanthacrona bipustulata Wulp using SEM, since many of them could not be observed just by the use of light microscopy.

In the state of Acre, Brazil, family-based agriculture is predominant and although it has less economic impact in relation to large-scale plantations, it is also subject to biological imbalances, such as the attack of pests, generating economic losses for producers. Phytosanitary knowledge in the state is still incipient and becomes an obstacle to production, often resulting in mistaken management decisions. In this context, this work aimed to present a history of research carried out in the field of Agricultural Entomology, especially in the areas of integrated management and biological control of pests of the most relevant crops grown in the Acre state. In this review, 55 scientific papers related to Agricultural Entomology were presented, 23 on new insect records and/or new insect associations with host plants, 16 on insect control using plant extracts from the Amazon region, 13 on integrated pest management and three on bioecology and population dynamics of pests in the state of Acre. Through this review, it is observed that research in the area  of Agricultural Entomology in the state of Acre is characterized by basic research (surveys, registration of new species, bioecological and dynamic population studies). However, there has been a notable advance in scientific studies aimed at integrated pest management in the state in the past ten years. Still, there is a need to concentrate efforts on research aimed at prospecting and using Amazonian biodiversity (fauna and flora), which subsidize applied programs for integrated pest management of the main crops grown in the Acre state.

The Neotropical region has the highest diversity of species, but despite this diversity, this region presents many sampling gaps. The objective of this study was to study the diversity of the mosquitoes of family Culicidae (Diptera: Culicomorpha) as well as to identify the mosquito vectors, in a fragment of Amazon Cerrado in Macapá, Amapá. Three collection methods (Shannon trap, CDC and active collection) were used, and the samples were collected between January to December 2006. 21 species were identified; 11 of them being vectors of malaria, dengue fever, yellow fever, Zika, chikungunya and filariasis; and three of them, Toxorhynchites h. haemorrhoidalis (Fabricius), Wyeomyia melanocephala Dyar & Knab and Wyeomyia aporonoma Dyar & Knab were recorded for the first time from Amapá. The present study contributes to the diversity of mosquitoes (Culicidae) that can be used in additional mapping studies to mitigate epidemic outbreaks in the state of Amapá.

Collections carried out for a period of 10 weeks from October to December 2013 in two fragments of Cerrado (experimental farm of Embrapa Gado de Corte and Private Reserve of Natural Heritage belong to the Universidade Federal de Mato Grosso do Sul (RPPN-UFMS)) located in the municipality of Campo Grande, state of Mato Grosso do Sul, Midwestern Brazil, with traps baited with decomposing beef liver, and collections conducted for a period of 15 days in January 2014 in the RPPN-UFMS, using Shannon traps baited with dog corpses, resulted in 32 flesh fly species of eight genera, with the first record of the genus Blaesoxipha and 15 new species records to Mato Grosso do Sul.

The family Lycaenidae (Lepidoptera) comprises over 6,000 described and widely distributed species. However, studies on interactions with other insects such as ants, parasitoids, and with food plants in the Neotropical region, are still scarce, even though such information are fundamental for better understanding the natural history of this taxonomic group. This study reports a new food plant to larvae of Lycaenidae species in the neotropics, as well as its parasitoid. A Lycaenidae larva was found and collected for immature stage observation under laboratory conditions. The larva fed on petals and seeds of Zornia latifolia Sm. (Fabaceae). Nineteen days after pupation in laboratory a larvipupal parasitoid of the genus Conura (Chalcididae) had egressed. This is the first report of tritrophic relationship amongst Z. latifolia, a Lycaenidae larva and its larvipupal parasitoid of the genus Conura in a periurban area near remnants of the Atlantic Forest, in Northeastern Brazil.

Pinnaspis strachani (Cooley) (Hemiptera: Diaspididae), a highly polyphagous scale insect and a known pest of various crops, is reported for the first time infesting neem (Azadirachta indica A. Juss., Meliaceae) in Brazil. Infestations of this diaspidid were observed on the trunks, branches, and leaves of neem trees in Barreiras, Bahia, Brazil.