scholarly journals Biological Control of Aonidiella aurantii (Hemiptera-Diaspididae) by the Entomopathogenic Fungi Aspergilllus flavus and Fusarium oxysporum

2020 ◽  
Vol 17 (2) ◽  
pp. 48-57
Author(s):  
Lamharchi El Hassane ◽  
Zahidi AbdelAziz ◽  
Hallouti Ayoub ◽  
Akchour Abdellah ◽  
El Finti aissam ◽  
...  
Keyword(s):  
Biological Control ◽  
Fusarium Oxysporum ◽  
Entomopathogenic Fungi ◽  
Aonidiella Aurantii

An assessment of biological control of the banana pseudostem weevil Odoiporus longicollis (Olivier) by entomopathogenic fungi Beauveria bassiana

2019 ◽  
Vol 20 ◽  
pp. 101262 ◽  
Author(s):  
Alagersamy Alagesan ◽  
Balakrishnan Padmanaban ◽  
Gunasekaran Tharani ◽  
Sundaram Jawahar ◽  
Subramanian Manivannan
Keyword(s):  
Biological Control ◽  
Beauveria Bassiana ◽  
Entomopathogenic Fungi

Biological control of Fusarium wilt of cucumber with nonpathogenic isolates of Fusarium oxysporum

1987 ◽  
Vol 33 (5) ◽  
pp. 349-353 ◽  
Author(s):  
T. C. Paulitz ◽  
C. S. Park ◽  
R. Baker
Keyword(s):  
Biological Control ◽  
Fusarium Oxysporum ◽  
Infection Rate ◽  
Fusarium Wilt ◽  
Disease Incidence ◽  
Infection Rates ◽  
Control Activity ◽  
Significant Difference ◽  
Cucumber Roots ◽  
Linear Regressions

Nonpathogenic isolates of Fusarium oxysporum were obtained from surface-disinfested, symptomless cucumber roots grown in two raw (nonautoclaved) soils. These isolates were screened for pathogenicity and biological control activity against Fusarium wilt of cucumber in raw soil infested with Fusarium oxysporum f. sp. cucumerinum (F.o.c.). The influence of three isolates effective in inducing suppressiveness and three ineffective isolates on disease incidence over time was tested. The effective isolates reduced the infection rate (R), based on linear regressions of data transformed to loge (1/1 – y). Effective isolate C5 was added to raw soil infested with various inoculum densities of F.o.c. In treatments without C5, the increase in inoculum densities of F.o.c. decreased the incubation period of wilt disease, but there was no significant difference in infection rate among the inoculum density treatments. Isolate C5 reduced the infection rate at all inoculum densities of F.o.c. Various inoculum densities of C5 were added to raw soils infested with 1000 cfu/g of F.o.c. In the first trial, infection rates were reduced only in the treatment with 10 000 cfu/g of C5; in the second trial, infection rates were reduced in treatments with 10 000 and 30 000 cfu/g of C5.

scholarly journals Classification and infection mechanism of entomopathogenic fungi

2018 ◽  
Vol 84 (0) ◽  
Author(s):  
Margy Alejandra Esparza Mora ◽  
Alzimiro Marcelo Conteiro Castilho ◽  
Marcelo Elias Fraga
Keyword(s):  
Biological Control ◽  
Entomopathogenic Fungi ◽  
Mode Of Action ◽  
Insect Cuticle ◽  
Biological Control Agents ◽  
Intensive Research ◽  
Infection Mechanism ◽  
The World ◽  
The Subject

ABSTRACT: Entomopathogenic fungi are important biological control agents throughout the world, have been the subject of intensive research for more than 100 years, and can occur at epizootic or enzootic levels in their host populations. Their mode of action against insects involves attaching a spore to the insect cuticle, followed by germination, penetration of the cuticle, and dissemination inside the insect. Strains of entomopathogenic fungi are concentrated in the following orders: Hypocreales (various genera), Onygenales (Ascosphaera genus), Entomophthorales, and Neozygitales (Entomophthoromycota).

scholarly journals Biological control of Fusarium oxysporum causal agent of gladiolus corm rot by streptomycetes

2021 ◽  
Vol 39 (3) ◽  
Author(s):  
Tania Ameyally Rios-Hernández ◽  
Alberto Uc-Varguez ◽  
Zahaed Evangelista-Martínez
Keyword(s):  
Biological Control ◽  
Fusarium Oxysporum ◽  
Causal Agent

<em>Fusarium oxysporum</em> causa la pudrición del cormo en gladiolo provocando pérdidas de hasta el 100%. Se seleccionaron aislados de Fusarium a partir de cormos infectados, se identificó morfológica y molecularmente y se seleccionó un aislado a partir de prueba de patogenicidad. Se seleccionó entre 22 aislados de estreptomicetos una cepa que presentó una actividad antagonista del 40% contra <em>Fusarium</em>. Se obtuvo el Extracto Bioactivo (EB) mediante Fermentación en Fase Sólida y se determinó la concentración mínima inhibitoria (MIC) y concentración mínima letal (MLC) por el método de microdilución. Se obtuvo una MIC para el EB de 0.19 mg mL-1 y una MLC de 0.38 mg mL-1, que se confirmó con un ensayo de germinación de microconidios a 8 h, mostrando un porcentaje de inhibición del 17 y 98% para ¼ y ½ de la MIC. Se evaluó el efecto del EB a 1 y 2 MIC’s de concentración contra la pudrición en cormos de gladiolo infectados, obteniendo un efecto protector en los cormos al mantener su dureza después de 15 días, en comparación con el fungicida Carbendazim. Los resultados indican a <em>Streptomyces</em> sp., como un potencial agente de control biológico contra <em>F. oxysporum</em>.

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