PRELIMINARY STUDIES OF EFFECTS OF JUVENILE HORMONE ANALOGUES ON ADULT EMERGENCE OF BLACK FLIES (DIPTERA: SIMULIIDAE)

1973 ◽  
Vol 105 (3) ◽  
pp. 509-511 ◽  
Author(s):  
J. E. Cumming ◽  
B. McKague
Keyword(s):  
Juvenile Hormone ◽  
Adult Emergence ◽  
Complete Inhibition ◽  
Black Flies ◽  
Breeding Sites ◽  
Juvenile Hormone Analogues ◽  
Simulium Decorum

AbstractBreeding sites for Simulium venustum, Simulium arcticum, Simulium pugetense, Simulium hunteri, Simulium canadense, and Simulium decorum were found in the Vancouver area. Addition of juvenile hormone analogues to the rearing water of S. decorum resulted in virtually complete inhibition of adult emergence.

EFFECTS OF INSECT DEVELOPMENTAL INHIBITORS ON ADULT EMERGENCE OF BLACK FLIES (DIPTERA: SIMULIIDAE)

1974 ◽  
Vol 106 (3) ◽  
pp. 253-256 ◽  
Author(s):  
B. McKague ◽  
P. M. Wood
Keyword(s):  
Growth Regulators ◽  
Slow Release ◽  
Stream Water ◽  
Adult Emergence ◽  
Black Flies ◽  
Insect Growth Regulators ◽  
Insect Growth ◽  
Slow Release Formulations ◽  
Simulium Decorum

AbstractAdult emergence of Simulium decorum and Simulium tuberosum was reduced or completely inhibited in air-agitated stream water by 0.1 p.p.m. slow release formulations of insect growth regulators. Abnormal pupae were produced when S. decorum larvae were exposed to 5 p.p.m. R20458-4E.

Larva lights: A decade of photoaffinity labeling with juvenile hormone analogues

1994 ◽  
Vol 24 (8) ◽  
pp. 747-761 ◽  
Author(s):  
Glenn D. Prestwich ◽  
Kazushige Touhara ◽  
Lynn M. Riddiford ◽  
Bruce D. Hammock
Keyword(s):  
Juvenile Hormone ◽  
Photoaffinity Labeling ◽  
Juvenile Hormone Analogues

EFFECTS OF ECDYSONES, JUVENILE HORMONE ANALOGS, AND 6-OXOOCTANOIC ACID ON THE DEVELOPMENT OF THE MOSQUITO, CULEX TARSALIS (DIPTERA: CULICIDAE)

1974 ◽  
Vol 106 (1) ◽  
pp. 79-85 ◽  
Author(s):  
P. I. Ittycheriah ◽  
M. S. Quraishi ◽  
E. P. Marks
Keyword(s):  
Juvenile Hormone ◽  
Topical Treatment ◽  
Adult Emergence ◽  
Fourth Instar ◽  
Culex Tarsalis ◽  
Juvenile Hormone Analog ◽  
Hormone Analog ◽  
High Doses ◽  
Hormone Analogs ◽  
Very High

AbstractEggs, larvae, and pupae of Culex tarsalis Coquillett were treated with ecdysones, juvenile hormone analogs, and 6-oxooctanoic acid. Effects of these agents on mortality, induction of supernumerary stages, and adult emergence were determined. Topical treatment of eggs with CRD9499 (a juvenile hormone analog), β-ecdysone, and 22-isoecdysone caused a reduction in adult emergence. Treatment of fourth-instar larvae with these chemicals not only induced mortality but also caused the formation of supernumerary intermediate stages. Larvae of C. tarsalis were very susceptible to CRD9499, but pupae were resistant. The ecdysones caused some mortality but only at very high doses and would thus be of little use as larvicides. 6-Oxooctanoic acid caused high rates of mortality at 0.001 M concentrations.

ECOLOGY OF BLACK FLIES (DIPTERA: SIMULIIDAE) OF THE SOURIS RIVER, MANITOBA AS A BASIS FOR CONTROL STRATEGY

1981 ◽  
Vol 113 (3) ◽  
pp. 223-234 ◽  
Author(s):  
A. R. Westwood ◽  
R. A. Brust
Keyword(s):  
Control Program ◽  
Abundant Species ◽  
Pest Species ◽  
Black Flies ◽  
Black Fly ◽  
Simulium Vittatum ◽  
Late Instar ◽  
Simulium Decorum ◽  
Fly Control ◽  
Wire Cage

AbstractTen species of black flies were collected from the Souris River, Manitoba between April 1977 and October 1978. Adults of Simulium luggeri Nicholson and Mickel, Simulium meridionale Riley, Simulium venustum Say, Simulium verecundum Stone and Jamnback, and Simulium johannseni johannseni (Hart) were collected feeding on livestock and humans, and are well known pest species. Simulium vittatum Zetterstedt was the most abundant species, but was not a pest on man or domestic animals. Simulium tuberosum (Lundström) and Simulium johannseni duplex Shewell and Fredeen were the least abundant species. Simulium j. johannseni, S. j. duplex, S. venustum, S. verecundum, S. tuberosum, and Cnephia dacotensis (Dyar and Shannon) appeared to be univoltine species while S. luggeri, S. meridionale, Simulium decorum Walker, and S. vittatum were multivoltine in the Souris River.An evaluation of cone, plate, rope, and wire cage sampling devices for black fly larvae and pupae indicated that cone samplers provided a more representative sample for population assessment.In a black fly control program, of the Souris River, Manitoba two separate larvicide treatments in spring may be necessary. In the case of two treatments, the first should be aimed at late instar larvae of S. j. johannseni, S. venustum, and S. verecundum. Since the majority of S. luggeri and S. meridionale would be in the egg stage at this time, a second treatment, 10–14 days later, would be necessary to control late instar larvae of these species.

scholarly journals Development and silk production by silkworm larvae after topical application of methoprene

2002 ◽  
Vol 59 (3) ◽  
pp. 585-588 ◽  
Author(s):  
José Ednilson Miranda ◽  
Sérgio Antonio de Bortoli ◽  
Roque Takahashi
Keyword(s):  
Juvenile Hormone ◽  
Larval Instar ◽  
Negative Effects ◽  
Hormone Analogue ◽  
Insect Growth Regulators ◽  
Silkworm Larvae ◽  
Silk Production ◽  
Juvenile Hormone Analogues ◽  
Chemical Products ◽  
Silkworm Bombyx Mori

Juvenile hormone analogues have been tested as insect growth regulators in silkworm (Bombyx mori), seeking an increment of silk production. These chemical products, when applied in small or moderate rates, promote the extension of the last larval instar. To understand the physiologic consequences on silk production by the silkworm strain C115 x N108, the application of methoprene, a juvenile hormone analogue, was performed to evaluate its effects on larval development and silk production. Methoprene was topically applied 48h after the fourth larval ecdysis, on the dorsal integument of the 2nd thoracic segment of the insects, at seven rates between 0 and 20 ng a.i. Methoprene influenced positively the duration of the fifth instar and the weight gain of the insects. The application of 1ng methoprene resulted in the heaviest silkglands, cocoons, shell cocoons and pupae weights. Comparatively to the control, the increment on silk production (approximately 24%) by the use of 1ng methoprene was more accentuated than the corresponding negative effects on the cocooning rate (approximately 12%).

scholarly journals Evaluation of Partially Submerged Sticky Traps On Lake Spillways For Adult Black Fly (Diptera: Simuliidae) Surveillance and Arbovirus Detection

2018 ◽  
Vol 34 (4) ◽  
pp. 306-310
Author(s):  
Michael C. Cavallaro ◽  
Eric Risley ◽  
Paige Lockburner
Keyword(s):  
Adult Female ◽  
Rural Areas ◽  
Surveillance Systems ◽  
Black Flies ◽  
Culex Mosquito ◽  
Sticky Traps ◽  
Black Fly ◽  
Equine Encephalitis Virus ◽  
Simulium Decorum ◽  
Average Standard Error

ABSTRACT Sentinel surveillance systems demonstrate an improved ability to supplement monitoring data and anticipate arbovirus outbreaks (i.e., sentinel avian species). Management complications can arise during unpredictable or unseasonal disease detections, especially in rural areas where resident distribution is patchy. Using spillways near residential lake communities as static surveillance locations, we tested a novel partially submerged sticky trapping technique and screened wild populations of adult female black flies (Diptera: Simuliidae) for West Nile virus (WNV) and eastern equine encephalitis virus (EEEV). Trap site selection criteria considered the density of immature black fly colonization on spillway surfaces and the number of positive detections of arboviral targets in nearby Culex mosquito populations. On average (±standard error), sticky traps captured 134 (±33) adult black flies over a 24-h period, with 1 trap capturing as many as 735 individuals. Although we detected positive cases of WNV from 20 Culex mosquito trapping sites within 16 km (approx. flight radius) of the selected lake spillways, mixed pools of adult female Simulium vittatum complex and Simulium decorum were all negative for both arboviruses. This study yielded an application for partially submerged sticky traps to collect adult female black flies. Its potential uses for monitoring the infection rates of more well-documented Simulium parasites are discussed.

Effects of juvenile hormone mimics on the codling moth Cydia Pomonella (L.) (Lep., Olethreutidae)

1973 ◽  
Vol 63 (1) ◽  
pp. 7-16 ◽  
Author(s):  
I. Gelbič ◽  
F. Sehnal
Keyword(s):  
Juvenile Hormone ◽  
Laboratory Experiments ◽  
Cydia Pomonella ◽  
Codling Moth ◽  
The Other ◽  
Wide Range ◽  
Juvenile Hormone Analogues ◽  
Juvenile Hormone Mimics

AbstractLaboratory experiments with juvenile hormone analogues on Cydia pomonella (L.) showed that Cecropia C17 juvenile hormone (methyl 10,ll-epoxy-3,7,ll-trimethyl-2,6-dodecadienoate) was the most active of the 28 compounds tested. When applied to four-hour-old eggs at 0.1 μg/egg, the hormone caused 100% failure in embryogenesis, while the other compounds were at least five times less effective. Depending on the time since ecdysis and the dose, juvenile hormone mimics applied to last-instar larvae resulted in a wide range of intermediate forms. Against three-day-old last-instar larvae, the Cecropia C17 hormone gave 100% inhibition of development at a dose of 1 μg/larva, while three other compounds (methyl 10,11-epoxy-3,7,11-trimethyl-2,6-dodecadienoate, ethyl 11-chloro-3,7,11-trimethyl-2-dodecenoate and ethyl 3,7,11-tri-methyl-2,4-dodecadienoate) gave the same effect at 2–5 μg/larva. Against newly emerged adults, the last two compounds at 10–50 μg/insect reduced fecundity and fertility to 0–81% and 0–50%, respectively, of their normal levels.

Effects of 5 Juvenile Hormone Analogues Applied Topically to Cattle Naturally Infested with Hypoderma Larvae (Diptera: Oestridae)1

1975 ◽  
Vol 12 (5) ◽  
pp. 517-524
Author(s):  
R. L. Younger ◽  
J. E. Wright ◽  
H. E. Smalley ◽  
H. R. Crookshank ◽  
J. O. Norman
Keyword(s):  
Juvenile Hormone ◽  
Juvenile Hormone Analogues
Sign in / Sign up

Export Citation Format

Share Document