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.

Usefulness of Two Diphenzyl Benzoyl Urea Insect Growth Regulators Against the Boll Weevil (Coleoptera: Curculionidae)

1991 ◽  
Vol 26 (4) ◽  
pp. 466-473
Author(s):  
D. A. Wolfenbarger ◽  
S. J. Nemec
Keyword(s):  
Growth Regulators ◽  
Field Tests ◽  
Adult Emergence ◽  
Boll Weevil ◽  
Anthonomus Grandis ◽  
Insect Growth Regulators ◽  
Field Cage ◽  
Insect Growth ◽  
Benzoyl Urea ◽  
Untreated Check

Topical applications at submicrogram levels of the insect growth regulators (IGR) penfluron and diflubenzuron prevented the hatch of boll weevil, Anthonomus grandis Boheman, eggs. Neither compound was toxic to the weevil, however field-cage studies showed that diflubenzuron greatly reduced emergence of weevils from squares. In all field tests spray applications were initiated at first one-third grown square (<1 cm dia) and continued for 13 to 17 applications during 51 days, throughout the cotton growing season on a 3–5 day schedule. In 1981, cotton sprayed with penfluron diluted in water plus petroleum oil had significantly greater yields than cotton sprayed with penfluron only. In 1982, diflubenzuron and penfluron diluted in oil and water and applied at 0.07 kg/ha, reduced boll weevil emergence from squares 57 to 78% compared to emergence in untreated plots. In 1983, emergence of adults from bolls was reduced 39% in plots sprayed with diflubenzuron at a rate of 0.28 kg A.I./ha. In 1981, no reduction in adult emergence from bolls only was observed in plots sprayed with penfluron at rate of 0.07 kg A.I./ha; when penfluron was applied at 3 day intervals in oil boll weevil emergence from squares was significantly reduced. Yields of seed cotton were significantly greater in plots sprayed on a 3–5 day schedule with penfluron or diflubenzuron in oil, at a rate of 0.07 or 0.28 kg A.I./ha respectively, when compared to the untreated check; they were 926, 1697 to 1874, and 726 kg/ha in 1981, 1982, and 1983, respectively, In 1981 and 1982, predator populations (mostly Hemiptera and spiders) in plots sprayed with either diflubenzuron or penfluron, with or without oil, were reduced significantly compared to populations in the untreated check.

Insect growth regulators. Analogs of TH-6038 and TH-6040

1976 ◽  
Vol 24 (5) ◽  
pp. 1065-1068 ◽  
Author(s):  
James E. Oliver ◽  
Albert B. DeMilo ◽  
Charles F. Cohen ◽  
Thomas J. Shortino ◽  
William E. Robbins
Keyword(s):  
Growth Regulators ◽  
Insect Growth Regulators ◽  
Insect Growth
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