scholarly journals Feeding preference of Spodoptera frugiperda on different sorghum genotypes

2019 ◽  
Vol 86 ◽  
Author(s):  
Carlos Eduardo da Silva Oliveira ◽  
Celi Santana Silva ◽  
Tiago Zoz ◽  
Andre Zoz ◽  
Agner de Freitas Andrade ◽  
...  

ABSTRACT The resistance of plants to pests is a feature of great importance for agriculture, as it reduces costs with insecticides and promotes increased yield resulting in higher profits. This work aimed to evaluate the feeding preference of the Spodoptera frugiperda caterpillar by different sorghum genotypes. The experiment was carried out at the Entomology Laboratory of Universidade Estadual de Mato Grosso do Sul, at University Unit of Cassilândia, from March to June 2016. The experimental design was completely randomized with ten replicates. The treatments were composed by seven sorghum genotypes: Agromen 50A40, Agromen 50A50, DOW 1G100, DOW 1G220, DOW 1G233, XB 6022 and LG 6310. Evaluations were performed with 1st instar caterpillars. The number of caterpillars that settled in the genotypes at 5, 10, 15, 20, 25, 30, 60 minutes and 24 hours after the infestation was recorded. The feeding preference index and the fresh leaf mass consumed were estimated. The Agromen 50A40 genotype showed lower attractiveness rating for the S. frugiperda among all evaluated sorghum genotypes.

Author(s):  
MARIA LUCIA SAITO ◽  
ARNILDO POTT ◽  
JOSÉ MARIA GUSMAN FERRAZ ◽  
ROSELI DOS SANTOS NASCIMENTO

Avaliou-se a atividade inibidora de alimentação de plantas nativas do Mato Grosso do Sul, utilizando lagartas dos insetos-pragas Spodoptera frugiperda e Anticarsia gemmatalis como organismos testes. Para os bioensaios foram preparados extratos alcoólicos pelo método da percolação, que após diluição foram aplicados em discos de folhas de milho ou de soja. Com os resultados das áreas consumidas foram calculados os índices de inibição alimentar. As espécies de plantas que apresentaram alguma atividade foram Agonandra brasiliensis, Ocotea suaveolens, Annona dióica e Machaerium hirtum (a mais ativa). Análises de grupos químicos presentes nas espécies mais ativas apontam a presença de saponinas, alcalóides, cumarinas ou flavonóides. EVALUATION OF PLANTS WITH ANTIFEEDANT ACTIVITY IN Spodoptera frugiperda (J.E. SMITH) AND Anticarsia gemmatalis HUBNER Abstract The antifeedant activity of native plants from Mato Grosso do Sul against caterpillars and phytophagous insects Spodoptera frugiperda and Anticarsia gemmatalis with test organisms was evaluated. For the bioassays alcoholic extracts were prepared by the percolation method which after dilution where applied on discs of corn and soya leaves. With the results of consumed areas the antifeeding index were calculated. The plant species that presented some activity were Agonandra brasiliensis, Ocotea suaveolens, Annona dioica and Machaerium hirtum (the most active). Chemical group analysis presented in the most active species revealed the presence of saponins, alkaloids, cumarins or flavonoids.


2018 ◽  
Vol 84 (0) ◽  
Author(s):  
Ronaldo Toma ◽  
Antonia Roel ◽  
Regiane Miranda

ABSTRACT: Collections of larvae of Spodoptera frugiperda (Smith, 1797) (Lepidoptera: Noctuidae) carried out in the field in three localities in the city of Campo Grande, Mato Grosso do Sul, Brazil, from October 2012 to March 2014, recorded the presence of three species of Diptera parasitizing Spodoptera frugiperda: two species of Tachinidae, Achytas incertus (Macquart, 1851) and Winthemia trinitatis Thompson, 1963, and one species of Sarcophagidae, Peckia (Sarcodexia) lambens (Wiedemann, 1830). The latter is identified for the first time parasitizing S. frugiperda in Brazil.


2015 ◽  
Vol 8 (3) ◽  
Author(s):  
Elmo Ponte de Melo ◽  
Raphael Maia Aveiro Cessa ◽  
Paulo Eduardo Degrande ◽  
Danilo Renato Santiago Santana

A cultura do algodão (Gossypium hirsutum L.) é hospedeira de um complexo de pragas que pode ocasionar danos às raízes, caule, folhas, botões florais, flores, maçãs, sementes e fibras. Este trabalho objetivou avaliar por meio da alimentação com folhas de algodoeiro geneticamente modificadas resistentes a lepidópteros, à sobrevivência e desenvolvimento de lagartas de Spodoptera frugiperda e Chrysodeixis includens. Os experimentos foram conduzidos no Laboratório de Entomologia Aplicada da Universidade Federal da Grande Dourados, Dourados, Mato Grosso do Sul, no período de 05 de janeiro (preparo dos vasos) a 23 de junho de 2012 (algodoeiros em fim de ciclo, com 154 dias após a emergência). As plantas foram cultivadas em casa de vegetação, enquanto os biotestes de sobrevivência e desenvolvimento de lagartas foram conduzidos em laboratório. Os estudos foram constituídos de: A – oferta de folhas de algodoeiro Coker TwinLink® e Cooker não modificada a lagartas de S. frugiperda; B – oferta de folhas de algodoeiro Coker TwinLink® e Cooker não modificada a lagartas de C. includens; C – oferta de folhas de algodoeiro PHY 440 WS Widestrike®, FM 975 WS Widestrike® e FM 933 não modificado a lagartas de S. frugiperda; D – oferta de folhas de algodoeiro PHY 440 WS Widestrike®, FM 975 WS Widestrike® e FM 933 não modificado a lagartas de C. includens. Compilando as informações do presente estudo, observamos que o algodoeiro Coker TwinLink® permitiu menores valores percentuais de sobrevivência de lagartas neonatas de C. includens se comparada à S. frugiperda. As linhagens de algodoeiros resistentes a lepidópteros interferem de forma negativa na sobrevivência e desenvolvimento de lagartas de S. frugiperda e C. includens, quando comparadas às linhagens não modificadas. Dependendo da linhagem, do evento geneticamente modificado e da praga, é necessário controle complementar.Palavras-chave: Programa de melhoramento. Resistência de plantas. Proteínas. 


UNICIÊNCIAS ◽  
2019 ◽  
Vol 23 (2) ◽  
pp. 127
Author(s):  
Jose Antonio Maior Bono ◽  
Rodrigo Dos Santos Rufino ◽  
Rafael Capriolli Gonçalves

Atualmente, a Brachiaria é o gênero que domina as áreas de pastagem no Brasil ocupando cerca de 200 milhões de hectares. A adubação nitrogenada nas pastagens formadas com esse gênero é de suma importância, pois o nitrogênio no solo não é suficiente para suprir as necessidades das forrageiras. O objetivo deste trabalho foi avaliar o efeito das fontes nitrogenadas de ureia e sulfato de amônio de forma individual e associada na produção de matéria seca de Brachiaria brizantha cv. Marandu na região de Bonito, MS. O experimento foi conduzido em um Neossolo Regolítico, constituído de doses e fontes de Nitrogênio (N) aplicado em cobertura, em um delineamento experimental de blocos ao acaso com 4 repetições. As doses de N foram de 0, 30, 60, 120 e 240 kg ha-1 tendo como fontes a ureia (UR com 45% N), ureia encapsulada (UR + E com 30% de N), sulfato de amônio (SA, com 20% N) e a mistura delas (UR + SA) em uma proporção de 50% de N de cada fonte. A eficiência do uso do N pela forrageira proveniente da ureia encapsulada foi maior que das outras fontes de N testadas. A mistura de sulfato de amônio e ureia na proporção de 1:1 na base de N possui eficiência mais elevada em relação às fontes sem a mistura, até a dose de 185 kg ha-1. Palavras-chave: Forrageiras. Adubação. Nitrogênio. Capim-Brachiaria. Abstract Brachiaria is a genus that dominates the pasture areas in Brazil occupying about 200 million hectares of pasture. The nitrogen fertilization on pastures is very important, because the nitrogen in the soil is not sufficient to meet the forager needs. The aim of this study was to evaluate the effect of nitrogen sources of urea and ammonium sulfate on an individual basis and associated with the dry matter production of Brachiaria brizantha cv. Marandu at Bonito region, MS. The experiment was conducted in a soil classified as Regolithic Neosol, consisting of doses and sources of nitrogen (N) applied in covers , in an experimental design of random blocks with 4 replications. The N doses were 0, 30, 60, 120 and 240 kg ha-1 having as sources urea (UR with 45% N), encapsulated urea  (UR + and 30% N), ammonium sulphate (SA, with 20% N) and mixing them (UR + SA) in a ratio of 50% N for each source. The use of encapsulated urea increases the efficiency of N use by Brachiaria brizantha CV. Marandu and the mixture of ammonium sulphate and urea in the ratio of 1: 1 on the basis of N increases their efficiency as the sources without the mixture. Keywords: Forages. Fertilization. Nitrogen. Grassland.


2011 ◽  
Vol 29 (4) ◽  
pp. 465-471 ◽  
Author(s):  
Paulo AM Leal ◽  
Edilson Costa ◽  
Jolimar A Schiavo ◽  
Alexander B Pegorare

In horticulture, the proper use of containers and substrates for the production of seedlings are important factors that affect crop productivity in the field. This study aimed to evaluate the effect of different containers and substrates in the production of lettuce (Lactuca sativa, cv Veneranda) and beetroot (Beta vulgaris, cv Top Tall Early Wonder) seedlings in nursery with monofilament screen, 50% of shading, and the productivity of these species when transplanted to field plots. In protected cultivation, a completely randomized experimental design, in a 3 x 3 factorial scheme (three polystyrene trays, R1= 72, R2= 128 and R3= 200 cells and three substrates, S1= 93% of soil + 7% of organic compost, S2= 86% of soil + 14% of organic compost and S3= 79% of soil + 21% of organic compost) was used, with 15 replications, where one plantlet was a replication. In the field, the nine treatments were evaluated in a completely randomized experimental design. The 72 cells tray with 7% commercial organic compost substrate promoted the best beetroot and lettuce seedlings. In the field, the plants from the 72 cell tray produced greater plants, independent of substrates type.


2021 ◽  
Vol 13 (3) ◽  
pp. 102
Author(s):  
Wagner Justiniano ◽  
Marcos Gino Fernandes ◽  
Josué Raizer

Managing the fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith, 1797), has been increasingly difficult owing to the increase in individual resistance to insecticides and genetically modified Bacillus thuringiensis (Bt) plants. This study used the attracting and killing method to control FAW adults in the field by spraying Noctovi® with methomyl insecticide. The experiments were conducted in commercial cornfields, non-Bt and Bt crops, over two agricultural years (2018 and 2019) at eight sites distributed in three cities located in the south of Mato Grosso do Sul State, Brazil. The following six insecticide treatments were used: spraying in continuous bands spaced every 100, 50, and 25 m; intermittent spraying every 25 m; control (without insecticide application); and spraying the entire area with insecticide (positive control). Food bait associated with the insecticide molecule was applied to the crop at vegetative stages V1 and V3, and the adult population size and level of leaf damage caused by the caterpillars (assessed via the Davis scale) were evaluated. The application of toxic bait in bands with spacing less than or equal to 50 m significantly reduced the percentage of damage to the plants, with the effect stronger in Bt crops. We suggest that the control of FAW adult populations would be more efficient if the attracting and killing technique was incorporated in integrated pest management programs for second corn crops.


2016 ◽  
Vol 88 (3 suppl) ◽  
pp. 1781-1789 ◽  
Author(s):  
IRYS F.S. COUTO ◽  
MATEUS L. FUCHS ◽  
FABRÍCIO F. PEREIRA ◽  
MUNIR MAUAD ◽  
SILVANA P.Q. SCALON ◽  
...  

ABSTRACT Plutella xylostella L. is one of the main agents to cause damages to plants of Brassica genus, provoking negative impacts in cultures. The use of botanical extracts in plants protection has been related in literature, however, their use in the species analyzed in this study is not yet reported. We assessed the effect of aqueous and methanolic extracts of the species: Schinus terebinthifolius Raddi (Pink Pepper), Annona coriacea Mart. (Araticum), Duguetia furfuracea (A. St.-Hil.) Benth. & Hook. (Pindaúva do campo) and Trichilia silvatica C. DC. (Catiguá-branco), occuring in the state of Mato Grosso do Sul and whose feeding preference of P. xylostella larvae of 3rd instar. We intend to answer the following questions: (1) Are the plant species analyzed fagodeterrentes? (2) what type of extract produces the least food preferrence? To answer these questions, we treated cabbage disks with aqueous extracts stored in a refrigerator in periods of 0, 7, 14 and 21 days and the methanolic extracts were treated at concentrations of 0.5 mg/mL, 1.0 mg/mL, 2.0mg/mL. The aqueous and methanolic extracts of T. silvatica presented the lowest values of feeding preference, 0.113 and 0.06, respectively, compared to other extracts.


2021 ◽  
Vol 10 (1) ◽  
pp. e14310110736
Author(s):  
Dthenifer Santana Cordeiro ◽  
Douglas Schlosser Machado ◽  
Francisco Eduardo Torres ◽  
Angelita dos Santos Zanuncio ◽  
Gabriela Gonçalves de Mendonça ◽  
...  

Low pasture production is due to degradation that leads to soil erosion processes. These conditions decrease the production of forage biomass and its resistance to drought. Thus, this study aimed to evaluate the viability of U. decumbens and millet consortium and in single cultivation, related to bromatological quality, using biological activator. The study was carried out in the field located in the experimental area of the Universidade Estadual de Mato Grosso do Sul - Unidade Universitária de Aquidauana (UEMS / UUA), phytotechnics sector, located in the city of Aquidauana MS, region of the Pantanal ecotone. It was adopted a randomized blocks in subdivided plots experimental design with 4 replications, treatments classified in: T1: Millet + activator, T2: Millet, T3: 75% Millet and 25% U. decumbens + activator, T4: 75% Millet and 25% U. decumbens, T5: U. decumbens + activator, T6: U. decumbens, T7: 25% Millet and 75% U. decumbens + activator, T8: 25% Millet and 75% U. decumbens, T9: 50% Millet and 50% U. decumbens + activator, T10: 50% Millet and 50% U. decumbens. At 70 DAE samples consisting of 60 leaves per plot were collected in each treatment. The collected part was the flag leaf, eliminating the basal third portion, apical and the midrib of each leaf. Then the analyzes of dry matter, ashes, PB, FDN and FDA were performed. The treatments that presented the best nutritional values were T3 and T4, however, analyzing grazing efficiency, it is recommended the treatments T7 and T8, once that they showed similar quality and they would be better used by the animals.


2019 ◽  
Vol 86 ◽  
Author(s):  
Rafael Azevedo da Silva ◽  
Paulo Degrande ◽  
Ellen Patricia de Souza ◽  
Carlos Eduardo Carducci ◽  
Matheus Fuchs Leal ◽  
...  

ABSTRACT This study was aimed at examining the composition of insects and fluctuations in their populations in Avena sativa in southern Mato Grosso do Sul. The study was carried out at the experimental farm of the Federal University of Grande Dourados (FAECA) in Dourados, Mato Grosso do Sul, in 2014 and 2015, in an area of three hectares divided into 80 plots of 169 m2 each. The assessments were carried out weekly by sampling the area within a 0.25-m2 metal frame, totaling ten evaluations. Within the frame, ten plants were examined for aphids and all plants were inspected for other insects. Based on the faunistic analysis (abundance, constancy, frequency, and dominance), eight species were observed during the two years of study. The most frequent, abundant, dominant, and recurring species were Rhopalosiphum padi, Spodoptera frugiperda and dipterans of the family Syrphidae (hoverfly). The population of R. padi increased until approximately the 40th day after emergence (DAE), when the highest abundance of hoverflies was also observed. After that, the population of R. padi decreased. The aphid R. padi was the main insect observed in A. sativa during the two years of study but were naturally controlled by hoverflies; therefore, chemical intervention was not needed.


2006 ◽  
Vol 41 (8) ◽  
pp. 1321-1323 ◽  
Author(s):  
Maria de Lourdes Corrêa Figueiredo ◽  
Angélica Maria Penteado Martins-Dias ◽  
Ivan Cruz

O objetivo deste trabalho foi monitorar a presença de pragas e seus inimigos naturais em diferentes regiões produtoras de milho. Foram coletadas 7.415 lagartas em plantas de milho, em municípios dos estados de Minas Gerais, Mato Grosso do Sul e Goiás. Foi observada associação do parasitóide Exasticolus fuscicornis Cameron (Hymenoptera: Braconidae) com o hospedeiro, lagarta de Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), em 1,54% das lagartas coletadas. O ciclo de vida do parasitóide foi de 23,31 dias. A longevidade de machos e fêmeas foi de 15 e 16,5 dias, respectivamente. A razão sexual foi de 0,36.


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