Susceptibility of Dendroctonus simplex to Hypocreales fungi: towards the development of a biological control strategy

2016 ◽  
Vol 141 (6) ◽  
pp. 487-495 ◽  
Author(s):  
N. Srei ◽  
R. Lavallée ◽  
C. Guertin
Keyword(s):  
Biological Control ◽  
Control Strategy ◽  
Dendroctonus Simplex

scholarly journals “Predator-In-First”: A Preemptive Biological Control Strategy for Sustainable Management of Pepper Pests in Florida

2020 ◽  
Vol 12 (18) ◽  
pp. 7816
Author(s):  
Vivek Kumar ◽  
Lucky Mehra ◽  
Cindy L. McKenzie ◽  
Lance S. Osborne
Keyword(s):  
Biological Control ◽  
Pest Management ◽  
Control Strategy ◽  
Frankliniella Occidentalis ◽  
Management Strategies ◽  
Control Program ◽  
Field Conditions ◽  
High Rate ◽  
Polyphagotarsonemus Latus ◽  
Consistent Performance

The early establishment of a biocontrol agent in the production system, whether in the greenhouse, nursery, or field, is essential for the success of the biological control program, ensuring growers’ profitability. In an effort to develop a sustainable pest management solution for vegetable growers in Florida, we explored the application of a preemptive biological control strategy, “Predator-In-First” (PIF), in regulating multiple pepper pests, Bemisia tabaci Gennadius, Frankliniella occidentalis Pergande, and Polyphagotarsonemus latus Banks under greenhouse and field conditions during different growing seasons. In these studies, two bell pepper cultivars (7039 and 7141) and the phytoseiid mite Amblyseius swirskii Athias–Henriot were used as a model system. Pepper seedlings (~8 week) of each cultivar were infested with varying rates of A. swirskii (20 or 40 mites/plant or one sachet/10 plant) and allowed to settle on plant hosts for a week before planting in pots or field beds. Results showed a comparative consistent performance of the treatment with the high rate of phytoseiids (40 mites/plant) in regulating B. tabaci and F. occidentalis populations in greenhouse studies, and B. tabaci and P. latus pests under field conditions. During two fall field seasons, higher marketable yields of 12.8% and 20.1% in cultivar 7039, and 24.3% and 39.5% in cultivar 7141 were observed in the treatment with the high rate of phytoseiids compared to the untreated control, indicating yield benefits of the approach. The outcome of the study is encouraging and demonstrates that PIF can be an important tool for organic vegetable growers and a potential alternative to chemical-based conventional pest management strategies. The advantages and limitations of the PIF approach in Florida pepper production are discussed.

DIFFERENTIAL ENCAPSULATION OF TWO BATHYPLECTES PARASITOIDS AMONG ALFALFA WEEVIL STRAINS, HYPERA POSTICA (GYLLENHAL)

1991 ◽  
Vol 123 (1) ◽  
pp. 197-203 ◽  
Author(s):  
Christopher M. Maund ◽  
T.H. Hsiao
Keyword(s):  
Biological Control ◽  
Control Strategy ◽  
Laboratory Studies ◽  
Alfalfa Weevil ◽  
Hypera Postica ◽  
Biological Differences

AbstractEncapsulation of Bathyplectes curculionis (Thomson) and B. anurus (Thomson) (Hymenoptera: Ichneumonidae) was investigated by dissecting parasitized larvae of three strains of the alfalfa weevil, Hypera postica (Gyllenhal) (Coleoptera: Curculionidae). In laboratory studies, there was no encapsulation of B. curculionis in the western strain of the weevil, a significant level of encapsulation in the eastern strain of the weevil, and nearly complete encapsulation in the Egyptian strain of the weevil. The rickettsia, Wolbachia postica Hsiao and Hsiao, found only in the western strain, was not involved in encapsulation. Variation in encapsulation was due to biological differences between weevil strains. Encapsulation rates among field populations of the western and Egyptian weevils were lower than in the laboratory. Encapsulation rates of weevil populations from zones in which western and Egyptian strains overlap in southern Utah, and between eastern and western strains in Colorado, were intermediate to rates of parental strains. These results imply that B. curculionis effectiveness against the western alfalfa weevil will decline with mixing of weevil strains. Bathyplectes anurus did not evoke encapsulation and was able to develop equally well in all three weevil strains. Our findings illustrate the importance of investigating the compatibility between alfalfa weevil strains and their parasitoids in devising a sound biological control strategy.

ASSESSING THE SUITABILITY OF STERILE INSECT TECHNIQUE APPLIED TOAEDES AEGYPTI

2008 ◽  
Vol 16 (04) ◽  
pp. 565-577 ◽  
Author(s):  
CLAUDIA PIO FERREIRA ◽  
HYUN MO YANG ◽  
LOURDES ESTEVA
Keyword(s):  
Biological Control ◽  
Cellular Automata ◽  
Aedes Aegypti ◽  
Control Strategy ◽  
Sterile Insect Technique ◽  
Alternative Control ◽  
Heterogeneous Distribution ◽  
Insecticide Application ◽  
Mosquito Behavior

The efficacy of biological control of Aedes aegypti mosquitoes using Sterile Insect Technique (SIT) is analyzed. This approach has shown to be very efficient on agricultural plagues and has become an alternative control strategy to the usual technique of insecticide application, which promotes resistance against chemical controls and is harmful to other species that live in the same mosquito habitat. By using a discrete cellular automata approach we have shown that in the case of Aedes aegypti, the spatially heterogeneous distribution of oviposition containers and the mosquito behavior, especially with respect to mating, make the application of STI difficult or impracticable.

scholarly journals De novo transcriptome assembly of Premnotrypes vorax (Coleoptera: Curculionidae)

2020 ◽  
Author(s):  
Luisa-Fernanda Velásquez C. ◽  
Pablo Emiliano Canton ◽  
Alejandro Sánchez-Flores ◽  
Alejandra Bravo ◽  
Jairo Cerón
Keyword(s):  
Biological Control ◽  
Control Strategy ◽  
De Novo ◽  
Transcriptome Assembly ◽  
Insect Pest ◽  
Illumina Hiseq ◽  
Tissue Samples ◽  
Cry Toxin ◽  
Illumina Hiseq Platform ◽  
Potato Crops

Abstract Objective: Premnotrypes vorax (P. vorax) is an insect pest that causes significant losses to potato crops in Colombia. Currently, the insect control is mainly done by using highly toxic chemical insecticides and there are no reports of any commercial biological control strategy against this pest. Hence, the objective of this study was to characterize the insect genetic expression to search for genes that could codify for Bacillus thuringiensis Cry toxin receptors. Using an RNA-seq approach, we sequenced the mRNA from the insect tissue, performed a de novo assembly and analyzed the reconstructed transcriptome of P. vorax. To our knowledge, this is the first genetic report of this endemic insect which will set the basis of a possible biological control strategy.Results: The transcriptome data was obtained from dissected midgut tissue samples of P. vorax larvae. The isolated RNA was isolated and sequenced using the Illumina HiSeq platform with a configuration of 2x150pb reads. A total of 383,552,246 reads were obtained and subsequently a quality and cleaning process was performed through FastQC and Trimmomatic software, respectively. A novo assembly was done using the Trinity software, obtaining a transcriptome assembly with 25,631 genes that showed at least one annotation record, resulting in 74,984 transcript isoforms.

scholarly journals First evidence of predation of the ant species Lasius alienus on the poultry red mite Dermanyssus gallinae

Acarologia ◽  
2021 ◽  
Vol 61 (1) ◽  
pp. 115-120
Author(s):  
Sirri Kar ◽  
Gurkan Akyildiz ◽  
Deniz Sirin ◽  
Sergio E. Rodriguez ◽  
Yilmaz Camlitepe
Keyword(s):  
Biological Control ◽  
Control Strategy ◽  
Predatory Behavior ◽  
Dermanyssus Gallinae ◽  
Experimental Investigations ◽  
Poultry Industry ◽  
Poultry Red Mite ◽  
Physical Methods ◽  
Successful Control

The poultry red mite (PRM), Dermanyssus gallinae (De Geer, 1778) (Acari: Dermanyssidae), is a common and significant ectoparasite of the poultry industry worldwide. Although various biological, chemical, and physical methods have been attempted, an utterly successful control strategy has not been put forward yet. Our experimental investigations and observations revealed that the ant species Lasius alienus displays an effective predatory behavior on all biological stages of PRM. Our results also suggested that L. alienus is attracted by PRM-infested substrate at a distance. We concluded that predation by the ant on PRM is worth further investigation as it could possibly be an effective biological control strategy.

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