Spores of Trichoderma strains sprayed over Acanthoscelides obtectus and Phaseolus vulgaris L. beans: Effects in the biology of the bean weevil

2020 ◽  
Vol 88 ◽  
pp. 101666
Author(s):  
Álvaro Rodríguez-González ◽  
María Piedad Campelo ◽  
Alicia Lorenzana ◽  
Sara Mayo-Prieto ◽  
Óscar González-López ◽  
...  
Keyword(s):  
Phaseolus Vulgaris ◽  
Bean Weevil ◽  
Phaseolus Vulgaris L ◽  
Acanthoscelides Obtectus

scholarly journals Economically significant pests of beans in Serbia

Biljni lekar ◽  
2021 ◽  
Vol 49 (6) ◽  
pp. 787-803
Author(s):  
Sonja Gvozdenac
Keyword(s):  
Phaseolus Vulgaris ◽  
Limiting Factor ◽  
Stink Bugs ◽  
Bean Weevil ◽  
Phaseolus Vulgaris L ◽  
Acanthoscelides Obtectus ◽  
Storage Pests ◽  
Aboveground Part ◽  
And Storage ◽  
Acanthoscelides Obtectus Say

Insects represent a limiting factor in the cultivation of beans (Phaseolus vulgaris L.) in most of the production regions, and often are the main cause of low productivity. During the vegetation, beans, as well as other legumes, are susceptible to the attack of numerous pests. The most significant are soil-dwelling, such as wireworms (fam. Elateridae), and storage pests like the bean weevil (Acanthoscelides obtectus Say). In addition to these two groups of insects, during the season, pests of the aboveground part such as aphids, thrips, stink bugs, and in dry years, mites, often occur causing significant losses.

scholarly journals Insecticidal Properties of Ocimum basilicum and Cymbopogon winterianus against Acanthoscelides obtectus, Insect Pest of the Common Bean (Phaseolus vulgaris, L.)

Insects ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 151 ◽  
Author(s):  
Álvaro Rodríguez-González ◽  
Samuel Álvarez-García ◽  
Óscar González-López ◽  
Franceli Da Silva ◽  
Pedro A. Casquero
Keyword(s):  
Phaseolus Vulgaris ◽  
Essential Oils ◽  
Pest Control ◽  
Ocimum Basilicum ◽  
Bean Weevil ◽  
Phaseolus Vulgaris L ◽  
Acanthoscelides Obtectus ◽  
Cymbopogon Winterianus ◽  
The Common ◽  
Active Substances

The bean weevil, Acanthoscelides obtectus Say (Coleoptera: Chrysomelidae: Bruchinae), causes severe post-harvest losses in the common bean, Phaseolus vulgaris L. The control of this insect is still poor and involves the use of conventional insecticides. There is an increasing demand in the search for new active substances and products for pest control towards reduction of adverse effects on human health and the environment. The protection of grains with alternative products, such as essential oils, is a possible alternative to meet the needs described above. Therefore, this investigation evaluated the applications of basil, Ocimum basilicum, and citronella, Cymbopogon winterianus, essential oils for A. obtectus control. These essential oils significantly reduced the bean weight losses and the number of beans damaged by A. obtectus at higher doses than 60 or 120 μL/sample. The number of holes per bean did not differ between the doses of basil essential oil, not even at the dose of 60 μL, while it was higher at 120 μL, probably due to a lower capacity of movement of the insects treated with this dose and/or the oil’s direct or indirect effects on the insects. Basil and citronella oils exhibited similar patterns of insecticidal activity over the insect, both directly in adult insects or indirectly over bean seeds. These essential oils affected the development of A. obtectus since the greatest doses applied on beans decreased the emergence of the bean weevil. The results prove the insecticidal capacity of the tested essential oils and hence their potential as active substances against A. obtectus in environmentally low risk pest control strategies. Supplementary trials should be conducted under real storage conditions.

scholarly journals Demografía de brúquidos (coleoptera: bruchidae) asociados

2017 ◽  
Vol 33 (1) ◽  
Author(s):  
Rosaelia Nohemí Ramírez Cariño ◽  
Jesús Romero Nápoles ◽  
Jorge Vera Graziano ◽  
Armando Equihua Martínez ◽  
Néstor Bautista Martínez ◽  
...  
Keyword(s):  
Phaseolus Vulgaris ◽  
Cicer Arietinum ◽  
Vigna Unguiculata ◽  
Lens Culinaris ◽  
Callosobruchus Maculatus ◽  
Tamarindus Indica ◽  
Phaseolus Vulgaris L ◽  
Acanthoscelides Obtectus ◽  
Cicer Arietinum L ◽  
Acanthoscelides Obtectus Say

Los brúquidos se alimentan principalmente de semillas de leguminosas, entre las cuales se encuentran algunos cultivos de importancia económica como el frijol (Phaseolus vulgaris L.), garbanzo (Cicer arietinum L.), lenteja (Lens culinaris Medik) y tamarindo (Tamarindus indica L.) entre otros, considerando al primero como la fuente principal de proteína en la dieta humana; sin embargo, Vigna unguiculata (L.) Walp, por sus propiedades nutritivas podría sustituir al frijol, pero su principal problema es la presencia de plagas, en particular los brúquidos, los cuales ocasionan pérdidas  considerables en postcosecha, por lo que fue necesario conocer los parámetros poblacionales de Acanthoscelides obtectus (Say, 1831), Callosobruchus maculatus (Fabricius, 1775) procedente de dos hospederos diferentes y Zabrotes subfasciatus (Boheman, 1833) alimentados con V. unguiculata por medio de un estudio demográfico bajo condiciones controladas. Los parámetros poblacionales se estimaron con la técnica de tablas de vida de cohorte, la prueba de Log rank (p ≤ 0.05) y las tasas de reproducción e intervalos de confianza con la técnica no paramétrica de Traslape de Intervalos (p ≤ 0.10), para comparar tasas instantáneas de reproducción (rm), llamada también capacidad innata de incremento. Estos parámetros poblacionales fueron mayores en la emergencia de los adultos y tasas de reproducción de C. maculatus en sus dos modalidades por lo que esta especie puede ocasionar serios problemas cuando se presenta asociado con V. unguiculata; sin embargo, A. obtectus y Z. subfasciatus sólo si no tienen opción podríanalimentarse de V. unguiculata en condiciones de almacenamiento.

scholarly journals Germination and Agronomic Traits of Phaseolus vulgaris L. Beans Sprayed with Trichoderma Strains and Attacked by Acanthoscelides obtectus

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2130
Author(s):  
Álvaro Rodríguez-González ◽  
Marcos Guerra ◽  
Daniela Ramírez-Lozano ◽  
Pedro Antonio Casquero ◽  
Santiago Gutiérrez
Keyword(s):  
Phaseolus Vulgaris ◽  
Root System ◽  
Type Strain ◽  
Aerial Part ◽  
Wild Type Strain ◽  
Agronomic Traits ◽  
Wild Type ◽  
Phaseolus Vulgaris L ◽  
Acanthoscelides Obtectus ◽  
Wet Weight

Acanthoscelides obtectus, one of the world’s most important post-harvest pests, attacks wild and cultivated common beans (Phaseolus vulgaris L.). Four Trichoderma strains, Trichoderma arundinaceum IBT 40837 (=Ta37), a wild-type strain producer of trichothecene harzianum A (HA); two transformed strains of Ta37, Ta37-17.139 (Δtri17) and Ta37-23.74 (Δtri23); and T. brevicompactum IBT 40841 (=Tb41), a wild-type strain producer of the trichothecene trichodermin, were evaluated to determine the effect of these compounds on the virulence of A. obtectus and the effect of these strains on the seed’s capacity of germination and on the agronomic traits of the plants grown from these seeds. Treatments of bean seeds with different Trichoderma strains provided varying survival rates in A. obtectus adults, so life survival of insects after Tb41 strain application was reduced to 15 days. Δtri17 and Tb41 strains sprayed on P. vulgaris beans resulted in low weight losses (1.21 and 1.55%, respectively). In spite of the low germination percentage of beans treated with Δtri23 strain (lower than the germination percentages of the rest of the fungal strains applied), this treatment encouraged a greater Wet Weight of Aerial Part of the plants grown from both damaged and undamaged beans. High germination rates of Ta37 and Δtri17 strains (higher than with the rest of treatments), did not turn into a greater Wet Weight Aerial Part and Wet Weight of Root System in the future plants developed. Linear regression between the number of exit holes and the wet weight aerial part on the one hand, and between the number of exit holes and the wet weight root system on the other, showed interaction, so Δtri23 and Tb41 strains behaved differently in comparison to their respective control treatments. The number of exit holes of beans treated with Δtri23 or Tb41 was negatively correlated with both the wet weight aerial part and the wet weight root system in P. vulgaris plants. Δtri23 sprayed on undamaged beans caused the greatest Wet Weight Aerial Part and wet weight root system in plants. Due to the good results obtained by Δtri23 and Tb41 strains in this work, more studies for A. obtectus control, P. vulgaris plant growth and trichothecenes production by these strains should be explored, in order to advance in the knowledge of how these fungi could be used in the field crop, together with the application of management strategies to mitigate risks for farmers and to minimize environmental contamination.

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