Hostname: page-component-77c89778f8-5wvtr Total loading time: 0 Render date: 2024-07-17T10:16:01.907Z Has data issue: false hasContentIssue false
  • English
  • Français

The importance of formulating insect growth regulators with surfactants and their blends for the control of the rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae)

Published online by Cambridge University Press:  08 April 2017

J. N. Mkhize  and
A. P. Gupta
J. N. Mkhize
Affiliation:
Department of Entomology and Economic Zoology, Cook College, New Jersey Agricultural Experimental Station, Rutgers University, New Brunswick, NJ 08903, U.S.A.
A. P. Gupta
Affiliation:
Department of Entomology and Economic Zoology, Cook College, New Jersey Agricultural Experimental Station, Rutgers University, New Brunswick, NJ 08903, U.S.A.
Get access

Abstract

The use of surfactants and their blends to improve the penetration of two insect growth regulators (IGRs; hydroprene and R-20458) into wheat kernels was investigated. It was found that formulation of IGRs with a surfactant, Tween-85 (polyoxyethylene trioleate), increased mortality and/or effectiveness of the IGRs. Formulation of hydroprene with a blend of Span-80 (sorbitan monooleate) with Tween-80 (polyoxyethylene monooleate) produced results comparable to those by hydroprene with Tween-85. However, formulations of IGRs with surfactants with high or low hydrophile-lipophile balance (HLB), failed to provide suitable control of the weevil, probably due to the type of emulsions formed. The same results were obtained with hydroprene formulations with blends of Spans and Tweens, even though their HLBs were close to that of Tween-85. Residual half-life for hydroprene was about three months; formulations with Tween-85 or a blend of Span-80 did not enhance the residual activity for hydroprene in wheat.

Keywords

Insect growth regulatorsurfactantstabilityeffectivenesspenetrabilitymortalityrice weevilSitophilus oryzae
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 6 , Issue 2 , April 1985 , pp. 183 - 186
Copyright
Copyright © ICIPE 1985

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Amos, T. B. and Williams, P. (1977) Insect growth regulators: effects of methoprene and hydroprene on productivity of several stored grain insects. Aust. J. Zool. 25, 201–206.CrossRefGoogle Scholar
Anonymous (1979) Alias Surfactants. ICI Americas Inc., Wilmington, Delaware.Google Scholar
Gupta, A. P. and Mkhize, J. N. (1983) Developmental and morphogenetic effect of two insect growth regulators (hydroprene and R-20458) on the female rice weevil, Sitophilus oryzae (S.) (Coleoptera: Curculionidae). Appl. Ent. Zool. 18, 11–21.CrossRefGoogle Scholar
Hoppe, T. (1976) Microplot trials with epoxy phenyl ether (insect growth regulator) against several pests of stored grains. J. stored Prod. Res. 12, 205–209.CrossRefGoogle Scholar
Hurste, H. (1940) Permeability of insect cuticle. Nature, Lond. 145, 462–63.Google Scholar
Hurste, H. (1943) Permeability and molecular constitution as factors in drug action. Nature, Lond. 152, 292–296.Google Scholar
Kramer, K. J. and McGregor, H. F. (1978) Activity of pyridyl and phenyl ether analogues of juvenile hormone against Coleoptera in stored grain. J. econ. Ent. 71, 132–134.Google Scholar
Loschiavo, S. R. (1976) Effects of synthetic insect growth regulators methoprene and hydroprene on survival, development or reproduction of six species of stored products insects. J. econ. Ent. 69, 395–399.CrossRefGoogle Scholar
Matsumura, F. (1975) Toxicology of Insecticides. Plenum Press, New York.Google Scholar
McGregor, H. F. and Kramer, K. J. (1976) Activity of Dimilin (TH6040) against Coleoptera in stored wheat and corn. J. econ. Ent. 69, 479–480.CrossRefGoogle Scholar
Mkhize, J. N. and Gupta, A. P. (1980) Comparative effects of some insect growth regulators on the development, morphogenesis and reproduction of the rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae). Jl N.Y. ent. Soc. 88, 62–63.Google Scholar
Richards, A. G. and Korde, F. H. (1948) Studies on Arthropod cuticle. II Electron microscope studies of extracted cuticle. Biol. Bull., Woods Hole 94, 212–235.CrossRefGoogle Scholar
Rowlands, D. G. (1976) The uptake and metabolism by stored wheat grains of an insect juvenile hormone and two insect hormone mimics. J. stored Prod. Res. 12, 35–41.Google Scholar
Staal, G. B. (1975) Insect growth regulators with juvenile hormone activity. A. Rev. Ent. 20, 417–460.CrossRefGoogle ScholarPubMed
Strong, R. G. and Diekman, J. (1973) Comparative effectiveness of fifteen insect growth regulators against several pests of stored products. J. econ. Ent. 66, 1167–1173.Google Scholar