Efeitos do plantio direto e da consorciação soja-milho sobre inimigos naturais e pragas

Cividanes, Francisco Jorge; Barbosa, José Carlos

doi:10.1590/s0100-204x2001000200004

Cited by 12 publications

(4 citation statements)

References 18 publications

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“…Several beneficial insects act as natural control of pests as S. frugiperda (Lepidoptera: Noctuidae), reducing its population and the damage caused by this caterpillar (Cividanes & Barbosa, 2001;Cruz, 2008). Parasitoids of Hymenoptera e Diptera (Figueiredo et al, 2006;Cruz, 2008) and predators such ladybugs, chrysopids, sirphids, predator bugs and earwigs (Cruz, 2008).…”

Section: Spodoptera Frugiperdamentioning

confidence: 99%

Arthropod fauna associated with organic and conventional maize crop

2021

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The corn crop has a marked sensitivity to biotic and abiotic stresses. As a control method, basically, transgenic plants have been used in association with chemical control. However, frequent applications of insecticides affect the conservation of biodiversity, and consequently, the natural regulation of insect populations. Thus, the objective of the work was to compare the diversity of arthropodofauna associated with the cultivation of corn in organic and conventional systems. The experiments were carried out at Fazenda Nossa Senhora Aparecida, in Hidrolândia/GO, in two areas: one in a consolidated organic system and the other in a conventional system. The organic area (1 ha) was sown with the Creole variety Palha Roxa and no type of cultural treatment was carried out. The conventional area (10 ha) was sown with a transgenic hybrid resistant to the herbicide glyphosate 30F53VYHR and two chemical fertilizers were applied, for planting and cover, two applications of herbicides and an application of insecticide. To survey the arthropodofauna, in each area, two collections were made with six pitfall soil traps. The first collection was carried out in the vegetative stage and the second in the reproductive stage, approximately at 35 and 80 days after planting, respectively. The traps were kept in the field for a week. In addition, a collection with entomological net was carried out in 10 plants chosen at random. The collected insects were stored in plastic pots containing 70% alcohol and taken to the laboratory for quantification and identification. The data referring to the total of insects collected were submitted to the T test at 5% probability. In the two collected with pitfall traps, the largest number of arthropods was collected in the area of organic cultivation, with greater diversity of orders and families in this area. In the collection performed with entomological network, there was no difference between the places of cultivation. Organic crops provide better conditions for establishment and development for insects, especially those that spend some life in the soil. Therefore, the diversity of arthropods is greater in this cultivation system.

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Section: Spodoptera Frugiperdamentioning

confidence: 99%

Arthropod fauna associated with organic and conventional maize crop

2021

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“…It causes major economic damage to this crop across the Americas [1][2][3][4]. The main strategies employed to control A. gemmatalis outbreaks rely on the use of synthetic insecticides, a range of selective or biorational products and the cultivation of transgenic plants expressing Bt insecticidal proteins [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Insecticidal Traits of Variants in a Genotypically Diverse Natural Isolate of <em>Anticarsia gemmatalis</em> Multiple Nucleopolyhedrovirus (AgMNPV)

Parras-Jurado¹,

Muñoz²,

Beperet³

et al. 2023

Preprint

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Outbreaks of Anticarsia gemmatalis (Hübner, 1818) (Lepidoptera: Erebidae), a major pest of soybean, can be controlled below economic thresholds with methods that do not involve the application of synthetic insecticides. Formulations based on natural isolates of the Anticarsia gemmatalis multiple nucleopolyhedrovirus (AgMNPV) (Baculoviridae: Alphabaculovirus), played a significant role in integrated pest management programs in the early 2000s, but a new generation of chemical insecticides and transgenic soybean, have displaced AgMNPV-based products over the past decade. However, the marked genotypic variability present among and within alphabaculovirus isolates suggests that highly insecticidal genotypic variants can be isolated and used to reduce virus production costs or overcome isolate-dependent host resistance. This study aimed to select novel variants of AgMNPV with suitable insecticidal traits that could comple-ment the existing AgMNPV active ingredients. Three distinct AgMNPV isolates were compared by restriction endonuclease profile and in terms of their occlusion body (OB) pathogenicity. One isolate was selected (AgABB51) from which eighteen genotypic variants were plaque purified and characterized in terms of their insecticidal properties. The five most pathogenic variants varied in OB pathogenicity although none of them was faster-killing or had higher OB production characteristics than the wild-type isolate. We conclude that the AgABB51 wild-type isolates ap-pear to be genotypically structured for fast speed-of-kill and high OB production, both of which would favor transmission. Interactions among the component variants are likely to influence this insecticidal phenotype.

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“…The majority of studies on carabids in agroecosystems are related to species from temperate regions, with very little information available for Neotropical species. Studies on carabids in Brazilian agroecosystems are related to population survey (Thomazini ; Specht & Corseuil ; Lacerda et al ; Auad & Carvalho ), effects of intercropping and no‐tillage systems (Cividanes & Barbosa ; Seffrin et al ) and species diversity and distribution in orange orchard adjacent to forest fragment (Cividanes et al ). There is also information on carabids in Pinus and Eucalyptus plantations and degraded area by soil use (Fagundes et al ; Moraes et al ).…”

Section: Introductionmentioning

confidence: 99%

Edge effects on carabid beetles (Coleoptera: Carabidae) between forest fragments and agricultural fields in south‐east Brazil

et al. 2017

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There is very little information available on the abundance, diversity and distribution of Neotropical species of carabid beetles in agroecosystems. We studied the diversity and similarity of carabids in forest fragments, soybean/corn crops and edges, and we also determined the number of individuals of carabid species in fragment and crop during the growing season of crop and the off-season period. The study was carried out on three separate areas located in the Jaboticabal and Guaíra municipalities, São Paulo State, Brazil, from November 2004 to May 2008. Each location consisted of forest fragment, adjacent soybean/corn crop and edge. Carabids were sampled with 48 pitfall traps arranged along two parallel transects 200 m long. In total, 3544 individuals of 62 species were collected, with the following five species dominating: Abaris basistriata Chaudoir, Odontocheila nodicornis (Dejean), Tetracha brasiliensis (Kirby), Scarites sp. 3 and Scarites sp. 4. Highest species diversity occurred in the edge with weedy plants. Carabid communities showed high similarity between edgecrop and edgefragments. Abaris basistriata, Calosoma granulatum Perty, Galerita brasiliensis Dejean, Selenophorus alternans Dejean, Selenophorus discopunctatus Dejean, T. brasiliensis and species of Scarites showed the most potential as biocontrol agents of soybean/corn pests.

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Efeitos do plantio direto e da consorciação soja-milho sobre inimigos naturais e pragas

Cited by 12 publications

References 18 publications

Arthropod fauna associated with organic and conventional maize crop

Arthropod fauna associated with organic and conventional maize crop

Insecticidal Traits of Variants in a Genotypically Diverse Natural Isolate of <em>Anticarsia gemmatalis</em> Multiple Nucleopolyhedrovirus (AgMNPV)

Edge effects on carabid beetles (Coleoptera: Carabidae) between forest fragments and agricultural fields in south‐east Brazil

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