Abstract Chrysomya albiceps , the larvae of which are facultative predators other dipteran species, has been introduced to Americas over recent years along with Old World species blowflies, including megacephala putoria and rufifacies . An apparent correlate this biological invasion a sudden decline in population numbers Cochliomyia macellaria native Americas. In study, we investigated predation rates on third instar C. by no‐choice, two‐choice three‐choice situations. Most attacks occurred...

The fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), cannot survive prolonged periods of freezing temperatures, thereby limiting where it can overwinter in North America. Climate change is anticipated to reduce the frequency freeze days Florida over decades, with potential consequence a significant expansion overwintering range, whose northern limit America was assessed between 27 and 28°N last century. To assess this possibility, development armyworm on corn...

Insect pest infestations can vary due to spatial differences in microclimates and food availability within agroecosystems. Covariates reflect these environmental conditions. This study tested whether using covariates two-phase sample optimization improved the predictions for soybean insect pests. During 2021–2022 crop season, samples were collected at 50 georeferenced points a commercial field Brazil, alongside data on such as vegetation indices, soil properties, terrain topography,...

High dispersal of Lepidoptera larvae between non-Bt and Bt cotton plants can favour the evolution insect resistance; however, information on host acceptance neonates in tropical transgenic crops is scarce. Therefore, purposes this study were as follows: (i) to investigate feeding behaviour susceptible Cry1F-resistant strains Spodoptera frugiperda (J.E. Smith) (Gossypium hirsutum L.) varieties (ii) understand possible effects field contamination infestation capacity S. by using an...

In blowflies, larval aggregation in patches of food can be both intra‐ and interspecific, depending upon the degree to which competitors are clumped among patches. present study, implications spatial for competition was investigated experimental populations introduced blowfly Chrysomya putoria native Cochliomyia macellaria , using data from survival adulthood a range single‐ double‐species cultures. The reduction C. rate presence suggests that former species is inferior competitor. results...

The pattern of larval interaction in blowflies confined with Chrysomya albiceps Wied. and C. rufifacies Maquart can be changed response to the predatory behaviour two species a contest-type process instead scramble competition that usually occurs blowflies. Facultative predation is frequent as an alternative food source during stage. In this study, we investigated dynamics intraguild by on other fly order analyse interspecific intraspecific survival albiceps, megacephala macellaria...

The relationship between the insect development rate and temperature was established very early represents an important ecological variable for modeling population dynamics of insects. accurate determination thermal constant values lower upper developmental thresholds Hyadaphis foeniculi (Passerini) (Hemiptera: Aphididae) on fennel (Foeniculum vulgare Miller (Apiales: Apiaceae)) crops would obviously benefit effective application control measures. This paper is a study biology requirements...

In this study we investigated predation rates on third instar larvae of Chrysomya putoria and C. megacephala by albiceps in a two-choice situation. The highest rate occurred result is compared to previous experiments, which macellaria were present. Our results suggest that, when absent attack more than larvae. Prey choice decisions its implications for introduced native blowflies are discussed.

Ecological modeling is an important tool for investigating dynamic behavior patterns in populations, trophic interactions, and behavioral ecology. However, the ecological that reflect population oscillation trends are often not clearly visible without analytical instruments such as models. Thus, plays a fundamental role describing demographic processes dynamics. models, besides making possible visualization of patterns, may also reveal persistence many systems, including prey-predator or...

In drosophilids, competition and coexistence can impact survivorship, growth, reproductive output. Here, we evaluated direct between two co-occurring fruit flies, the spotted-wing drosophila Drosophila suzukii African fig fly Zaprionus indianus , comparing results from field collections with laboratory experiments. Field were conducted to evaluate co-occurrence species. laboratory, different densities of eggs each species provided an artificial diet, intra- interspecific regarding biological...

We carried out a year-long survey of insects, using carrion-baited traps in the municipality Campinas and five surrounding municipalities with different urbanization profiles, southeastern Brazil. studied spatio-temporal variability preferences for type bait three blow fly species that are forensically important Brazil: Chrysomya albiceps (Wiedemann), megacephala (F.), Lucilia eximia (Wiedemann). All preferred chicken. C. L. urban environment, while rural environment. Calliphoridae,...

In addition to feeding on carrion tissues and fluids, social wasps can also prey immature adult flies, thereby reducing their populations retarding the decomposition process of carcasses. this study, we report occurrence behavior attracted vertebrate carrion. The collections were made monthly from September 2006 October 2007 in three environments (rural, urban, forest) six municipalities southeast Brazil, using baited bottle traps. We collected Agelaia pallipes (Olivier, 1791) (n = 143),...

In this study we investigated the larval dispersal associated with predation in experimental populations of Chrysomya albiceps and Cochliomyia macellaria. Frequency distribution sampling units (G test) substrate was used to evaluate variation dispersal. An acrylic channel (1 x 0.1 0.2 m) covered wood shavings observe prior pupation. The graduated at 0.05 m intervals, each representing a unit; hence, 20 were set up. A Petri dish containing third instar larvae single double species deposited...

Studies of community assembly have emphasized snapshot comparisons spatially replicated samples from “natural” assemblages. Agro-ecosystems are characterized by relatively little habitat heterogeneity and no dispersal barriers for actively flying insects. Therefore, dynamic patterns species segregation aggregation more likely to reflect the direct or indirect effects interactions. We studied temporal organization a guild 21 congeneric Anastrepha that colonized fruit orchards in Monte Alegre...

The egg-parasitoid wasp Telenomus podisi has received attention as a biological-control agent for one of the most important soybean pests in Brazil, stink bug Euschistus heros. As yet, no studies have conclusively established strategies release T. podisi. We developed computational model using cellular automata C programming language to investigate crops, order optimize use these wasps managing E. heros, assuming two-dimensional grid cells corresponding field.The capable maintaining an heros...

In the present study, a single procedure was established to investigate effect of spatial distribution immatures in patchy resources, on outcome larval competition for food, experimental populations Chrysomya megacephala . A theoretical model intraspecific extended and applied data survival adulthood 20 densities, obtain mean number individuals that will survive, considering hypothetical previous random adult oviposition system homogeneous patches. The curve obtained suggests food C. is...

The laboratory population dynamics of Chrysomya megacephala (F.) was explored with a mathematical model density-dependent growth. Fecundity and survival decreased significantly as function larval density. Parameters in the exponential regressions fitted to fecundity data were incorporated into finite-difference equation that incorporates delayed effect density on adults. theoretical C. showed cyclic behavior stable limit cycle two points for adults immatures.