Potential of fungi as biocontrol agents of polyphagotarsonemus latus (Acari: Tarsonemidae)

Entomophaga ◽  
1996 ◽  
Vol 41 (1) ◽  
pp. 27-36 ◽  
Author(s):  
J. E. Pena ◽  
L. S. Osborne ◽  
R. E. Duncan
Keyword(s):  
Biocontrol Agents ◽  
Polyphagotarsonemus Latus

Plants as biocontrol agents against phytoparasite nematodes

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
P Avato ◽  
M Argentieri ◽  
S Laquale ◽  
T D'Addabbo
Keyword(s):  
Biocontrol Agents

PREFERENCIA DE Polyphagotarsonemus latus (Banks) (Acari: Tarsonemidae) A LAS HOSPEDANTES: Carica papaya L., Phaseolus acutifolius Asa Gray y Melanthera aspera (Jacq) Small.

2018 ◽  
Vol 11 (12) ◽  
Author(s):  
J. Marroquín-Agreda
Keyword(s):  
Carica Papaya ◽  
Polyphagotarsonemus Latus ◽  
Phaseolus Acutifolius ◽  
Asa Gray

Objetivo: Analizar la preferencia de Polyphagotarsonemus latus a los hospedantes comerciales Papaya (Carica papaya L.) y Fríjol escumite (Phaseolus acutifolius) y Sajan blanco (Melanthera aspera).Diseño/metodología/aproximación: Se utilizó un diseño factorial completamente al azar, con tres tratamientos (hojas de plantas con daño mecánico (carborundum), hojas infestadas con el ácaro y hojas sanas) y 12 repeticiones. Se usaron cajas Petri, donde se depositaron 30 hembras a 5 cm equidistantes a las tres especies de hojas. Las observaciones se realizaron a intervalos de una hora, se registró el número de ácaros y las áreas foliares de las hojas ofrecidas. Las medias se compararon mediante la prueba DMS (0.05). Resultados: El ácaro mostró mayor preferencia al saján blanco y fríjol escumite; la preferencia se incrementó en las hojas dañadas por la herbivoría del mismo ácaro. No existieron diferencias significativas entre las áreas de las hojas en el tratamiento con hojas sanas y condaño mecánico; pero sí en las áreas con daño del acaro. Las hembras de P. latus ovipositaron solamente en hoja de fríjol después de dos días.Limitaciones del estudio/implicaciones: La marchitez precoz del saján blanco puede ser una limitante para analizar las respuestas de repulsión, ya que los experimentos requieren mayor tiempo de observación.Hallazgos/conclusiones: P. latus prefirió más las hojas del saján blanco y el frijol escumite que las hojas de papaya dañadas por la herbivoría. Solo se vio que el limbo de las hojas de papaya se redujo debido a la acción de la herbivoría.

Exploration of Endophytes from Alfalfa (Medicago sativa L.) as Biocontrol Agents

2020 ◽  
pp. 1-8
Author(s):  
Beilei Wu ◽  
Beilei Wu ◽  
Mei Li ◽  
Xiaoli Chen ◽  
Xiliang Jiang ◽  
...  
Keyword(s):  
Medicago Sativa ◽  
Root Rot ◽  
Agricultural Production ◽  
Biocontrol Agents ◽  
Bacillus Spp ◽  
Medicago Sativa L ◽  
The Common ◽  
Seedling Germination ◽  
Germination Experiments ◽  
Alfalfa Root

Endophytes are increasingly investigated as biocontrol agents for agricultural production. The identification of new endophytes with high effectiveness against plant disease is very important. A total of 362 strains of endophytes, including fungi, bacteria, and actinomycete, were isolated from alfalfa (Medicago sativa L.) collected in Hebei, Inner Mongolia and Ningxia provinces of China. The three strains of endophytic bacteria (NA NX51R-5, NA NX90R-8, and NA NM1S-1) with strong biocontrol capability with >50% effectiveness were screened against the common alfalfa root rot pathogen Fusarium oxysporum F. sp. medicaginis in alfalfa seedling germination experiments on MS medium and pot experiments. Using phylogenetic analysis, the isolates of NA NM1S-1 and NA NX51R-5 were identified as Bacillus spp. by 16S rDNA, while NA NX90R-8 was found to be Pseudomonas sp.

scholarly journals Diffusible Compounds Produced by Hanseniaspora osmophila and Gluconobacter cerinus Help to Control the Causal Agents of Gray Rot and Summer Bunch Rot of Table Grapes

Antibiotics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 664
Author(s):  
Matías Olivera ◽  
Ninoska Delgado ◽  
Fabiola Cádiz ◽  
Natalia Riquelme ◽  
Iván Montenegro ◽  
...  
Keyword(s):  
Mycelial Growth ◽  
Inhibitory Effect ◽  
Biocontrol Agents ◽  
Environmental Cost ◽  
Antifungal Compounds ◽  
Table Grapes ◽  
Dual Cultures ◽  
Bunch Rot ◽  
Direct Bioautography

Gray and summer bunch rot are important diseases of table grapes due to the high economic and environmental cost of their control with synthetic fungicides. The ability to produce antifungal compounds against the causal agents Botrytis, Aspergillus, Penicillium, and Rhizopus of two microorganisms isolated from table grapes and identified as Hanseniaspora osmophila and Gluconobacter cerinus was evaluated. In dual cultures, both biocontrol agents (together and separately) inhibited in vitro mycelial growth of these pathogens. To identify the compounds responsible for the inhibitory effect, extractions were carried out with organic solvents from biocontrol agents separately. Through dual cultures with pathogens and pure extracts, only the hexane extract from H. osmophila showed an inhibitory effect against Botrytis cinerea. To further identify these compounds, the direct bioautography technique was used. This technique made it possible to determine the band displaying antifungal activity at Rf = 0.05–0.2. The compounds present in this band were identified by GC-MS and compared to the NIST library. The most abundant compounds, not previously reported, corresponded to alkanes, ketones, alcohols, and terpenoids. H. osmophila and G. cerinus have the potential to control the causal agents of gray and summer bunch rot of table grapes.

scholarly journals Influence of competition and intraguild predation between two candidate biocontrol parasitoids on their potential impact against Harrisia cactus mealybug, Hypogeococcus sp. (Hemiptera: Pseudococcidae)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
María B. Aguirre ◽  
Octavio A. Bruzzone ◽  
Serguei V. Triapitsyn ◽  
Hilda Diaz-Soltero ◽  
Stephen D. Hight ◽  
...  
Keyword(s):  
Intraguild Predation ◽  
Interference Competition ◽  
Biocontrol Agents ◽  
Parasitoid Species ◽  
Temporal Window ◽  
Response Models ◽  
Potential Impact ◽  
Functional Response Models ◽  
Fully Bayesian ◽  
Release Strategy

AbstractWhen two or more parasitoid species, particularly candidates for biocontrol, share the same target in the same temporal window, a complex of behaviors can occur among them. We studied the type of interactions (competition and intraguild predation) that existed between the nymphal parasitoids Anagyrus cachamai and A. lapachosus (Hymenoptera: Encyrtidae), two candidate neoclassical biocontrol agents against the Puerto Rican cactus pest mealybug, Hypogeococcus sp. (Hemiptera: Pseudococcidae). The surrogate native congener host in Argentina, the cactus mealybug Hypogeococcus sp., was studied to predict which species should be released; in the case that both should be released, in which order, and their potential impact on host suppression. In the laboratory we conducted experiments where different densities of the host mealybug were exposed to naive females of A. cachamai and A. lapachosus sequentially in both directions. Experiments were analyzed by combining a series of competitive behavioral and functional response models. A fully Bayesian approach was used to select the best explaining models and calculate their parameters. Intraguild predation existed between A. cachamai, the species that had the greatest ability to exploit the resource, and A. lapachosus, the strongest species in the interference competition. The role that intraguild predation played in suppression of Hypogeococcus sp. indicated that a multiple release strategy for the two biocontrol agents would produce better control than a single release; as for the release order, A. lapachosus should be released first.

Exploration of microbiome of medicinally important plants as biocontrol agents against Phytophthora parasitica

2021 ◽  
Author(s):  
Irum Iqrar ◽  
Zabta Khan Shinwari ◽  
Ashraf Sabry Abdel Fatah El-Sayed ◽  
Gul Shad Ali
Keyword(s):  
Biocontrol Agents ◽  
Phytophthora Parasitica
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