Biology and Feeding Requirements of Larval Hunter Flies Coenosia attenuata (Diptera: Muscidae) Reared on Larvae of the Fungus Gnat Bradysia impatiens (Diptera: Sciaridae)

2010 ◽  
Vol 103 (4) ◽  
pp. 1149-1158 ◽  
Author(s):  
Todd A. Ugine ◽  
Emily J. Sensenbach ◽  
John P. Sanderson ◽  
Stephen P. Wraight
Keyword(s):  
Fungus Gnat ◽  
Bradysia Impatiens ◽  
Coenosia Attenuata

Development of immature tiger-fly Coenosia attenuata (Stein) reared on larvae of the fungus gnat Bradysia impatiens (Johannsen) in coir substrate

2017 ◽  
Vol 45 (1) ◽  
pp. 75-84 ◽  
Author(s):  
Deyu Zou ◽  
Thomas A. Coudron ◽  
Weihong Xu ◽  
Xishu Gu ◽  
Huihui Wu
Keyword(s):  
Fungus Gnat ◽  
Bradysia Impatiens ◽  
Coenosia Attenuata

Ingestion of Pythium spp. by larvae of the fungus gnat Bradysia impatiens (Diptera:Sciaridae)

1990 ◽  
Vol 116 (2) ◽  
pp. 205-212 ◽  
Author(s):  
R. B. GARDINER ◽  
W. R. JARVIS ◽  
J. L. SHIPP
Keyword(s):  
Fungus Gnat ◽  
Bradysia Impatiens

scholarly journals Larval Bradysia impatiens (Diptera: Sciaridae) Potential for Vectoring Pythium Root Rot Pathogens

2012 ◽  
Vol 102 (3) ◽  
pp. 283-289 ◽  
Author(s):  
S. E. Braun ◽  
J. P. Sanderson ◽  
S. P. Wraight
Keyword(s):  
Root Rot ◽  
Laboratory Experiments ◽  
Petri Dish ◽  
Paper Substrate ◽  
Pythium Root Rot ◽  
Fungus Gnats ◽  
Before And After ◽  
Fungus Gnat ◽  
K 13 ◽  
Bradysia Impatiens

A series of laboratory experiments were conducted to investigate the capacity of Bradysia impatiens (Johannsen) larvae to ingest propagules from two strains each of Pythium aphanidermatum (Edson) Fitzp. and P. ultimum Trow and transmit the pathogens to healthy geranium seedlings on a filter-paper substrate in petri dishes. The capacity of fungus gnat larvae to transmit P. aphanidermatum to seedlings rooted in a commercial peat-based potting mix and germination of Pythium oospores and hyphal swellings before and after passage through the guts of larval fungus gnats were also examined. Assays revealed that Pythium spp. transmission by larval fungus gnats varied greatly with the assay substrate and also with the number and nature of ingested propagules. Transmission was highest (65%) in the petri dish assays testing larvae fed P. aphanidermatum K-13, a strain that produced abundant oospores. Transmission of strain K-13 was much lower (<6%) in plug cells with potting mix. Larvae were less efficient at vectoring P. ultimum strain PSN-1, which produced few oospores, and no transmission was observed with two non-oospore-producing strains: P. aphanidermatum Pa58 and P. ultimum P4. Passage of P. aphanidermatum K-13 through larval guts significantly increased oospore germination. However, decreased germination of hyphal swellings was observed following larval gut passage for strains of P. ultimum. These results expand previous studies suggesting that larval fungus gnats may vector Pythium spp.

Control efficacy of fungus gnat, Bradysia impatiens, enhanced by a combination of entomopathogenic nematodes and predatory mites

2019 ◽  
Vol 138 ◽  
pp. 104071 ◽  
Author(s):  
Rajendra Acharya ◽  
Hwal-Su Hwang ◽  
Jae-Kyoung Shim ◽  
Yeon-Su Yu ◽  
Kyeong-Yeoll Lee
Keyword(s):  
Entomopathogenic Nematodes ◽  
Predatory Mites ◽  
Control Efficacy ◽  
Fungus Gnat ◽  
Bradysia Impatiens

scholarly journals Enhanced Control of the Fungus Gnat Bradysia odoriphaga (Diptera: Sciaridae) by Co-Application of Clothianidin and Hexaflumuron

Insects ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 571
Author(s):  
Yongqing Wang ◽  
Kai Wan ◽  
Ruifei Wang ◽  
Jiyingzi Wu ◽  
Ruiquan Hou ◽  
...  
Keyword(s):  
Maximum Residue Limit ◽  
Control Efficacy ◽  
Codex Alimentarius ◽  
Codex Alimentarius Commission ◽  
Application Rates ◽  
Fungus Gnat ◽  
Major Pest ◽  
First Time

The fungus gnat is a major pest of chive in China. Its control has been relied heavily on the application of clothianidin. Due to the intensive application, its control efficacy become reduced. The present study was intended to evaluate co-drenching of clothianidin with hexaflumuron on absorption and dissipation of clothianidin in chive plants and soils and determine the effect of such application on control efficacies. Chive production fields in Guangdong and Hubei Provinces were drenched with clothianidin alone and a mixture of clothianidin and hexaflumuron at low application rates. Concentrations of clothianidin in chive plants and soils were analyzed by HPLC. Results showed that co-application had higher control efficacies against the fungus gnat than clothianidin alone. The co-application enhanced clothianidin absorption and dissipation and extended the half-lives of clothianidin in chive. It was likely that hexaflumuron protected chive roots from larva damage, and healthy roots absorbed more clothianidin, resulting in the extension of the half-lives. Additionally, the terminal residues of clothianidin in chive after 14 days of application were lower than the maximum residue limit in chive set by the Codex Alimentarius Commission. This study for the first time documented that co-application of clothianidin and hexaflumuron improved chive plants in absorption and dissipation of clothianidin and enhanced fungus gnat control efficacies.

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