EFFECTS OF THE INSECT GROWTH REGULATOR BAY SIR 8514 ON PEST DIPTERA AND NONTARGET AQUATIC ORGANISMS

1981 ◽  
Vol 113 (3) ◽  
pp. 185-191 ◽  
Author(s):  
A. E. Colwell ◽  
C. H. Schaefer
Keyword(s):  
Growth Regulator ◽  
Lepomis Macrochirus ◽  
Aquatic Organisms ◽  
Insect Growth Regulator ◽  
Gambusia Affinis ◽  
Fish Mortality ◽  
Bluegill Sunfish ◽  
Benthic Organisms ◽  
Granule Formulation ◽  
Planktonic Rotifers

AbstractTreatment of a pond with a 0.5% sand granule formulation of SIR-8514 yielded a maximum, concentration (4.6 ppb) by 1 day following the application. No residues were detected in the pond sediment and by 28 days posttreatment residues were not found at any depth of the water column. Emergence of pestiferous dipterans was reduced by >99%, and planktonic arthropod populations decreased by >90% following the treatment. Planktonic rotifers and dinoflagellates, and benthic organisms were less severely affected.Bluegill sunfish (Lepomis macrochirus Rafinesque) and mosquitofish (Gambusia affinis Baird and Girard) accumulated maximum concentrations (ca. 400 ppb) of SIR-8514 by 2 days posttreatment. No residues in fish were detected by 28 days posttreatment, and no fish mortality was observed.

TESTS OF A GROWTH REGULATOR ON MOSQUITOES (DIPTERA: CULICIDAE) AT CHALK RIVER

1976 ◽  
Vol 108 (11) ◽  
pp. 1153-1154 ◽  
Author(s):  
W. F. Baldwin ◽  
G. D. Chant
Keyword(s):  
Growth Regulator ◽  
Aquatic Organisms ◽  
Insect Growth Regulator ◽  
Southern United States ◽  
Mosquito Larvae ◽  
Culex Tarsalis ◽  
Palo Alto ◽  
Local Species ◽  
Mosquito Breeding ◽  
Low Toxicity

Tests of a synthetic insect growth regulator (Altosid SR-10, or Methoprene, Zoecon Corp., Palo Alto, Calif.) have been completed recently at Chalk River Nuclear Laboratories. This paper reports on the effectiveness of this promising material in tests on several species of mosquitoes of this area. The low toxicity to mammals, the relative absence of deleterious effects on non-target aquatic organisms under normal use (Staal 1975), the fact that Altosid is readily biodegradable and is effective at low rates of application would recommend this material for the control of mosquito larvae. Reports in the literature on the use of juvenile hormone-type compounds have dealt mainly with mosquitoes in the southern United States; for example, Schaefer and Wilder (1973) reported on Aedes nigromaculis, A. melanimon, and Culex tarsalis in California. In our tests, we wished to determine its effectiveness on local species and in mosquito breeding pools where temperatures would be lower than in the work mentioned above.

Phylogeny and morphology of Ovipleistophora diplostomuri n. sp. (Microsporidia) with a unique dual-host tropism for bluegill sunfish and the digenean parasite Posthodiplostomum minimum (Strigeatida)

Parasitology ◽  
2017 ◽  
Vol 144 (14) ◽  
pp. 1898-1911 ◽  
Author(s):  
J. LOVY ◽  
S. E. FRIEND
Keyword(s):  
Lepomis Macrochirus ◽  
Aquatic Organisms ◽  
Fish Tissue ◽  
Surface Coat ◽  
Bluegill Sunfish ◽  
Microsporidian Parasite ◽  
Host Tropism ◽  
Posthodiplostomum Minimum ◽  
Close Relationship ◽  
Relationship Of

SUMMARYMicrosporidia are diverse opportunistic parasites abundant in aquatic organisms with some species hyperparasitic in digenean parasites. In the current study, we describe a unique microsporidian parasite, Ovipleistophora diplostomuri n. sp. that has a tropism for both the bluegill sunfish Lepomis macrochirus, and its digenean parasite Posthodiplostomum minimum. Though the microsporidium first infects a fish, the subsequent infection causes hypertrophy of the metacercarial wall and degeneration of the P. minimum metacercariae within the fish tissue. Genetic analysis placed this species within Ovipleistophora and ultrastructural characteristics were consistent with the genus, including the presence of dimorphic spores within sporophorous vesicles. Meronts did not have a surface coat of dense material, which has been previously reported for the genus. This is the first Ovipleistophora species described that does not have a tropism for ovary. Genetics demonstrated that O. diplostomuri n. sp. groups closely within fish microsporidia and not other species known to be hyperparasitic in digeneans, suggesting that it evolved from fish-infecting microsporidians and developed a secondary tropism for a common and widespread digenean parasite. The high genetic identity to Ovipleistophora species demonstrates the close relationship of this unique microsporidian with other microsporidia that infect ovary.

Survey for Tributyltin in Water and Sediment in Canada in 1999

2005 ◽  
Vol 40 (4) ◽  
pp. 431-447 ◽  
Author(s):  
R. James Maguire ◽  
Suzanne P. Batchelor
Keyword(s):  
Acute Toxicity ◽  
Pest Control ◽  
Marine Sediments ◽  
Chronic Toxicity ◽  
Aquatic Organisms ◽  
Benthic Organisms ◽  
Freshwater Sediments ◽  
Antifouling Paints ◽  
Water And Sediment ◽  
Small Craft

Abstract A survey of water and sediment from 152 harbours, marinas and shipping channels across Canada was conducted in 1999 to determine the extent of contamination by tributyltin (TBT) prior to the total ban on its antifouling uses being phased in over the period 2003 to 2008, and to assess the effectiveness of the 1989 regulation of antifouling uses of TBT under the Canadian Pest Control Products Act. TBT was found in sediments in this survey much more frequently than in water. The main conclusion was that by 1999 the regulation had been generally effective in reducing TBT contamination in water, but not sediment, in small-craft marinas and harbours. TBT continued to be found in some freshwater and seawater locations frequented by larger vessels, that could have been legally painted at the time with TBT antifouling paints, at concentrations that could cause chronic toxicity to aquatic organisms. TBT was also found in many marine sediments, and some freshwater sediments, at concentrations that could cause chronic toxicity to sensitive benthic organisms. In addition, TBT concentrations in many marine sediments could cause acute toxicity to sensitive benthic organisms. Because of the long persistence of TBT in sediments, it may pose a hazard to benthic organisms in some locations in Canada for many years after the total ban on antifouling uses of TBT.

Environmental degradation of the insect growth regulator methoprene

1975 ◽  
Vol 5 (3) ◽  
pp. 233-241 ◽  
Author(s):  
Gary B. Quistad ◽  
Luana E. Staiger ◽  
David A. Schooley
Keyword(s):  
Environmental Degradation ◽  
Growth Regulator ◽  
Insect Growth Regulator ◽  
Insect Growth
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