Abstract The fall armyworm, Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae), is a major pest of maize and frequently demands control measures. timing insecticide application key factor in determining its efficiency, so an experiment was designed to investigate this. Application based on three criteria: (i) the number trap-caught moths Delta-type trap with commercial sex pheromone lure placed center target area, soon after plant emergence; (ii) percentage plants exhibiting pinhole-type...

The corn earworm Helicoverpa zea (Boddie) and the old world bollworm armigera (Hübner) (Lepidoptera: Noctuidae) are allopatric species occur in important agricultural crops. In maize, both tend to infest ear. introduction of H. Brazil has created a new scenario, where these might cohabit interact with one another, affecting prevalence each agroecosystem, integrated pest management, insect resistance management. this study, larval occurrence proportion maize was assessed three regions during...

Helicoverpa armigera is a pest of several crops causing significant economic impact. We evaluated the insect development on different vegetative and reproductive structures cotton, maize, soybean compared to artificial diet. One hundred individuals were per structure (cotton leaves bolls; maize leaves, grains, silk; pods) Centesimal analyses performed quantifiable nutrient contents in diets. The viability immatures (eggs, larvae, pupae) ranged from 30% leaf 74% cotton bolls, while diet, it...

Aphis gossypii Glover (Hemiptera: Aphididae) is a polyphagous species frequently associated with the presence of sooty mold and viruses lethal to plants. The purpose this work was characterize possible resistance categories cotton genotypes against A. gossypii. Initially, preliminary test carried out 78 genotypes, 15 which were selected for infestation ability assays determination cumulative aphid-day rates. Posteriorly, these also evaluated through antixenosis antibiosis assays. FM 910, 966...

We performed molecular and biological characterizations of immature stages Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) using insects from different states in Brazil, host plants. Three laboratory colonies H. were established with the São Paulo, Bahia, Distrito Federal, that collected citrus, cotton, corn, respectively. For each colony, microsatellites used to assess genetic similarity among insects. The biology colony also was compared under conditions (25 ± 1 °C, 70 10% RH, 14:10 h...

Abstract: The objective of this work was to evaluate the potential damage green-belly stink bug, Dichelops melacanthus, corn in greenhouse and field conditions. Three trials were carried out. In greenhouse, plants V1 stage evaluated after each them infested with one insect four developmental stages (nymphs third, fourth, fifth instars adults) during 14 days. field, (V1, V3, V5, V7) inside cages five adult bugs, also another trial same treatments conducted days, but an infestation intensity...

The silverleaf whitefly Bemisia tabaci biotype B is one of the most important sucking pests common bean, which causes severe damages and requires frequently synthetic insecticides spraying to protect crop productivity. use bean cultivars resistant attack an strategy within integrated pest management (IPM) program. biological development B. confined 17 genotypes was evaluated in greenhouse trials verify occurrence antibiosis. Whitefly adults were released on plants these oviposit, afterward...

Diabrotica speciosa is considered one of the most important agricultural pests in Latin America. Attacks various plant species including fructiferous, vegetable, cucurbit, dicotyledonous, and gramineous crops. The goal this work was to evaluate influence different host plants, offered during larval adult stages D. on their development, reproductive capacity, foliar consumption. insects were reared with corn stage common bean, corn, soybean, forage turnip wheat phase. In another essay, larvae...

Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) is a pest of major agricultural crops, such as soybean and cotton. A better understanding larval movement important for its integrated management resistance management. Studies with neonates through second instar larvae are still limited by the difficulties involving handling observation these instars. Many studies require marking larvae, most research focused on moths. However, our study investigated aspects behavior H. plants. The dyes...

The study of the interaction between parasitoid and host, especially age these organisms, is an important step towards implementation biological control programs. Therefore, we investigated performance Ooencyrtus submetallicus (Hymenoptera: Encyrtidae) Trissolcus sp. aff. urichi Scelionidae) parasitizing eggs Nezara viridula (Hemiptera: Pentatomidae), considering different ages parasitoids host. We performed four laboratory bioassays: two using females O. at 24, 48, 72, 96, 120, or 144 hours...

Temperature is one of the abiotic factors that strongly influences biology and behavior insects. In this study, we assessed development egg parasitoids Ooencyrtus submetallicus Telenomus podisi parasitizing Euschistus heros eggs at different temperatures, estimated average number generations for seven representative soybean-producing regions in Brazil. A comparative study was conducted, where percentage parasitism emergence, life cycle duration (egg–adult), longevity were found to be similar...

Any factor that may limit the leaf area of crop in soybean compromise its development and, consequently, productivity. The aim study was to evaluate effect different levels artificial defoliation performed vegetative and reproductive stages two cultivars, FT Campo Mourão Brasmax Potência. treatments consisted in: 1) Without throughout culture cycle; 2) 16.7% stage; 3) 33.3% on 4) 5) 6) 7) cycle. Regardless level soybeans, it found cultivar Potência presented higher values plant height,...

The objective of the present work was to implement integrated pest management (IPM) in soybean crop, comparing it with carried out by farmer during two consecutive seasons. monitoring adult lepidopterans also evaluated using Delta-type traps baited sexual pheromones Spodoptera frugiperda (Bio Spodotera®), Helicoverpa armigera Helicoverpa®) and Chrysodeixis includens Pseudoplusia®). Incidence caterpillars stinkbugs soybeans weekly determined, both IPM area farmer, beat cloth method....

Abstract Coleopterans within the family Coccinellidae play an important role in biological control of Bemisia tabaci MEAM1 Gennadius (Hemiptera: Aleyrodidae), a worldwide pest. Here we report initial assessment predatory capacity and aspects South American coccinellid, Delphastus davidsoni Gordon (Coleoptera: Coccinellidae) to B. immature stages under laboratory conditions. Within 24 h after release, D. adults were increasingly more attracted consumed six times fourth instar nymphs than...

ABSTRACT Bioassays to evaluate the selectivity of pesticides beneficial organisms are important tools discriminate products compatible with biological pest control programs. This study aimed effects main insecticides used in soybean crop on egg parasitoid Ooencyrtus submetallicus (Hymenoptera: Encyrtidae). The tested treatments (active ingredients) were: methomyl, lambda-cyhalothrin + thiamethoxam, beta-cyfluthrin imidacloprid, novaluron and teflubenzuron, highest doses indicated by...

ABSTRACT: Pest insects are one of the major factors affecting productivity sugarcane, and especially those associated with soil, which damage crop if not controlled. There is little information on insect soil in sugarcane state Mato Grosso do Sul, Brazil. This study evaluated occurrence, abundance population variation soil-associated crops four counties Sul during a period from September 2009 to August 2010. For capture insects, deep trenches were (50 x 50 30 width length depth). It was...

Plectris alienaChapin, 1934, a white grub that promotes serious damage to variety of crops in North America and Australia, has been reported for the first time Brazil. Larvae adults P. aliena were recorded sugarcane state Mato Grosso do Sul, sampled by trenches soil with light traps, respectively, during 2012 2013. Root consumption was also determined first, second third instar larvae. The species is univoltine; found mainly Aug peak larval density Apr all fields sampled. Pupae observed...

The use of nucleopolyhedroviruses (NPVs) can provide an effective and environmentally benign alternative to synthetic chemicals. efficacy persistence their occlusion bodies may be affected by several factors. present study investigated the isolate Chin-IA (I-A) (ChinSNPV) on third-instar Chrysodeixis includens larvae after 10 days its application in soybean plants under semi-field conditions. Two concentrations virus (2x1011 10x1011 PIB ha-1) water (control treatment) were applied plants....

ABSTRACT Chrysodeixis includens is an important pest of soybean crop who has gained more visibility in the Brazilian Cerrado due to damage caused this region. Foliar consumption, feeding period and mortality level loopers laboratory, as well their control field conditions, were evaluated after application ChinNPV virus plants. In tested six concentrations isolate Chin-IA (I-A) (1 × 1011, 2 4 6 8 1011 10 PIB ha-1), one dose methomyl chemical insecticide (172 g ai ha-1) distilled water...