scholarly journals Integrated Mosquito Management in Experimental Constructed Wetlands: Efficacy of Small-Stature Macrophytes and Fluctuating Hydroperiod

Water ◽  
2016 ◽  
Vol 8 (10) ◽  
pp. 421 ◽  
Author(s):  
William Walton ◽  
Dagne Duguma ◽  
Min Tao ◽  
David Popko ◽  
Scott Nygren
Keyword(s):  
Constructed Wetlands ◽  
Small Stature ◽  
Mosquito Management ◽  
Integrated Mosquito Management

scholarly journals The Impact of Hurricane Irma on Our Community and the Collier Mosquito Control District's Mission

2020 ◽  
Vol 36 (2s) ◽  
pp. 11-14
Author(s):  
Robin A. King ◽  
Rebecca Heinig ◽  
Patrick Linn ◽  
Keira J. Lucas
Keyword(s):  
Mosquito Control ◽  
Electrical Power ◽  
Southwest Florida ◽  
Disease Vector ◽  
Collier County ◽  
Mosquito Management ◽  
The Impact ◽  
Integrated Mosquito Management ◽  
Hurricane Irma ◽  
Subtropical Environment

ABSTRACT The Collier Mosquito Control District, located in southwest Florida, is uniquely positioned in a subtropical environment between the Gulf of Mexico and Everglades National Park. The District's mission is focused on the control of disease vector and nuisance mosquitoes in Collier County, which is accomplished through integrated mosquito management. Hurricane Irma made landfall in the county on September 10, 2017, leaving in its wake tremendous property and infrastructure damage, and it also disrupted communications and airport operations. These factors greatly affected the District's operations and its ability to meet its mission. In addition, the lengthy loss of electrical power forced most residents outdoors, increasing their exposure to mosquitoes. From challenges in completing poststorm treatments to outdated policies that caught us off-guard, the event prompted a new hurricane policy and plan to ensure improved preparedness for the next natural disaster. The poststorm environment also provided a rich foundation for research into mosquito populations after tropical disturbances of this scale. Here we report the impact on the District's aerial mosquito control operations, changes to internal policies, and mosquito population abundance following Hurricane Irma.

Larvicidal Activity of Aqueous Pod Extract of Adansonia Digitata (Linnaeus, 1753) on Culex Quinquefasciatus (Say, 1823) Maulik

2020 ◽  
Vol 36 (1) ◽  
pp. 96-102
Author(s):  
B. Kamba
Keyword(s):  
Plant Material ◽  
Probit Analysis ◽  
Adansonia Digitata ◽  
Culex Mosquitoes ◽  
Mosquito Management ◽  
Phytochemical Constituents ◽  
The Mean ◽  
Integrated Mosquito Management ◽  
One Way Anova ◽  
Third Instar Larvae

The study evaluatrd the effect of Baobab, Adansonia digitata pod extract on larvae of Culex quinquefaciatus. The plant material was sun-dried for two weeks and pulverized using mortar and pestle and stored at room temperature for further processes. Powdered plant material was extracted using aqueous cold extraction method. The condensed extract was screened for phytochemicals. Indoor resting adult blood-fed female Culex mosquitoes were collected and introduced into Entomological Cages in the Laboratory and oviposited on water in the bowls. The third instar larvae were confirmed as Cx. quinquefasciatus using Hopkins keys for Culicinae. Triplicates of twenty-five late third instar larvae were tested in pod extract concentrations of 0.5mg/L, 1.0mg/L, 1.5mg/L, 2.0mg/L and 2.50mg/L. Mortality was recorded after 24hr of exposure. The LC50 was determined using probit analysis, while one-way ANOVA was used to establish significant differences in larval mean mortality. Phytochemical constituents such as carbohydrate, cardiac glycosides, steroids, triterpenes, tannins, flavonoids and alkaloids were present. The mean mortality of test concentrations differed significantly (p≤0.05) from control. However, the concentrations: 0.5mg/L and 8.0mg/L had 49% and 71% mortalities, respectively with LC50 of 0.6mg/L. It can be concluded that, the aqueous pod extract of Adansonia digitata demonstrated good activity against Cx. quinquefasciatus. Adansonia digitata pod extracts has potential for controlling larvae of Culex mosquitoes and can be incorporated into integrated mosquito management programme.

scholarly journals Susceptibility of South Texas Aedes aegypti to Pyriproxyfen

Insects ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 460
Author(s):  
Jose G. Juarez ◽  
Selene M. Garcia-Luna ◽  
Christopher M. Roundy ◽  
Alyssa Branca ◽  
Michael G. Banfield ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Growth Regulator ◽  
Insect Growth Regulator ◽  
South Texas ◽  
Susceptible Population ◽  
Insect Growth ◽  
Mosquito Management ◽  
Chemical Products ◽  
Larval Bioassay ◽  
Integrated Mosquito Management

An integral part to integrated mosquito management is to ensure chemical products used for area-wide control are effective against a susceptible population of mosquitoes. Prior to conducting an intervention trial using an insect growth regulator, pyriproxyfen, in South Texas to control Aedes aegypti, we conducted a larval bioassay to evaluate baseline levels of susceptibility. We used seven serially-diluted doses ranging from 2.5 ppb to 6.3 × 10−4 ppb. We observed 100% inhibition emergence (IE) at even the lowest dose of 6.3 × 10−4 ppb in our susceptible reference colony of Ae. aegypti Liverpool. In our field strain of Ae. aegypti (F5 colonized from South Texas) we observed 79.8% IE at 6.3 × 10−4 ppb, 17.7% IE at 1.25 × 10−3 ppb, 98.7% IE at 1.25 × 10−2 ppb, and 100% emergence inhibition for the remainder of the doses. Given that commercial pyriproxyfen products are labeled for doses ranging to 50 ppb, we conclude that the field population sampled by this study are susceptible to this insect growth regulator.

scholarly journals SEMI-FIELD ULV EVALUATION OF AN ALL-PURPOSE BOTANICAL INSECTICIDE CONTAINING CEDARWOOD AND CINNAMON OILS AGAINST ADULT AEDES AEGYPTI

2021 ◽  
Vol 66 (1) ◽  
Author(s):  
Christopher S. Bibbs
Keyword(s):  
Aedes Aegypti ◽  
Essential Oils ◽  
Mosquito Control ◽  
Botanical Insecticides ◽  
Botanical Insecticide ◽  
Cinnamon Oil ◽  
Growing Body ◽  
Mosquito Management ◽  
Integrated Mosquito Management ◽  
Indoor And Outdoor

Public health mosquito control operates with only two classes of mosquito adulticides: pyrethroids and organophosphates. Recent work improving the emulsification of essential oils has increased the potential for development of plantderived active ingredients. There is a growing body of literature on essential oils for various roles in mosquito management. NatureCide Pest Management (NCPM), a product available in private and commercial home pest control, uses a mixture of 25.3% cedarwood oil and 12.7% cinnamon oil as a Federal Insecticide, Fungicide, Rodenticide Act (FIFRA) exempt insecticide for both indoor and outdoor use. Recent investigations by the Anastasia Mosquito Control District of St. Johns County have found other FIFRA exempt products to be effective as a residual spray on vegetation. In continuing the exploration of botanical insecticides, NCPM was used in ULV tests against Aedes aegypti (L.) within its 35-122 ml per L of water label rate. Applications at 35 ml/L resulted in 60-70% knockdown after 1 hr and mortality after 24 hr. Increasing the rate to 70 ml/L resulted in 100% knockdown and mortality across all replications. Crystalline precipitation of the microemulsion was observed in mix tanks after standing for at least 2 wk, but it was not apparent that the efficacy of the product was reduced as a consequence. Cedarwood oil and cinnamon oil are a beneficial combination for ULV adulticiding against mosquitoes and could have a beneficial role for integrated mosquito management.

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