Study on the Efficacy of Vacuum Treatment for Disinfesting Silophilus zeamais
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บทคัดย่อ
The objective of this research was to study the effects of exposure time, pressure and surrounding temperature on the mortality of eggs and adults of Sitophilus zeamais. Eggs (0 – 2 d) and adults (> 7 d) of S. zeamais were exposed to different combinations of four pressures (50±10, 100±10, 300±10 and 500±10 mmHg) and three temperatures (20, 30 and 40°C). The LT99 (lethal exposure time at 99% mortality) of eggs and adults were in ranges of and 15.29 – 198.97 1.22 – 130.86h, respectively. At the same pressure and temperature, eggs were more tolerant to vacuum than adults stage. Decreasing pressure and/or increasing temperature led to a higher efficacy of the vacuum treatment. In order to compare the efficacy of vacuum treatment against carbon dioxide fumigation, trials were conducted in PVC enclosures containing 150 kg of paddy at room temperature. Vacuum treatment at 100±10 mmHg for 8 d yielded higher insect mortality rates comparable to those of carbon dioxide fumigation. Considering the findings in the present study and those established by other researchers, exposure time of at least 8 d at pressure lower than 100±10 mmHg is recommended for disinfesting S. zeamias.
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สมาคมวิศวกรรมเกษตรแห่งประเทศไทย
Thai Socities of Agricultural Engineering
References
Bell, C.H., Wilson, S.M., 1995. Phosphine tolerance
and resistance in Trogoderma granarium everts
(Coleoptera:Dermestidae). Journal of Stored
Products Research 31, 199-205.
Bell, C.H., Wilson, S.M., Banks, H.J., 1984. Studies
on the toxicity of phosphine to tolerant stages
of Trogoderma granarium everts (Coleoptera:
Dermestidae). Journal of Stored Products
Research 20, 111-117.
Calderon, M., Navarro, S., Donahaye, E., 1966. The
effect of low pressures on the mortality of six
stored-product insect species. Journal of Stored
Products Research 2, 135-140.
Collins, P.J., Daglish, G.J., Pavic, H., Kopittke, R.A., 2005.
Response of mixed-age cultures of phosphineresistant
and susceptible strains of Lesser Grain
Borer, Rhyzopertha dominica, to phosphine at a
range of concentrations and exposure periods.
Journal of Stored Products Research 41, 373–385.
Emekci, M., Navarro, S., Donahaye, E., Rindner, M.,
Azrieli, A., 2002. Respiration of Tribolium castaneum
(Herbst) at reduced oxygen concentrations. Journal
of Stored Products Research 38, 413-425.
Emekci, M., Navarro, S., Donahaye, E., Rindner, M.,
Azrieli, A., 2004. Respiration of Rhyzopertha
dominica (F.) at reduced oxygen concentrations.
Journal of Stored Products Research 40, 27-38.
Finkelman, S., Navarro, S., Isikber, A., Dias, R., Azrieli, A.,
Rindner, M., Lotan, Y., Debruin, T., 2002. Application of
vacuum to sealed flexible containers: A viable
alternative to disinfestation of durable commodities
with methyl bromide. In: Batchelor, T.A., Bolivar,
J.M. (Eds), Proceedings of the International
Conference on Alternatives to Methyl Bromide, 5-8
March 2002, Sevilla, Spain, pp. 145-149.
Finkelman, S., Navarro, S., Lotan, Y., Debruin, T., Isikber,
A.A., Rindner, M., Dias, R., Azrieli, A., 2003a. Insect
control of cocoa pests using a novel vacuum
approach. In: Credland, P.F. et al. (Eds), Proceedings
of the Eighth International Working Conference on
Stored Product Protection, 22-26 July 2002, York,
UK, CAB International, Wallingford, UK, pp. 579-582.
Finkelman, S., Navarro, S., Rindner, M., Dias, R., Azrieli,
A., 2003b. The use of portable systems to control
insect pests by low pressures. In: Navarro, S. et al.
(Eds), the IOBC WPRS Working Group “Integrated
Protection in Stored Products”, 16-19 September
, Kusadasi, Turkey, pp. 233–239.
Finkelman, S., Navarro, S., Rindner, M., Dias, R., Azrieli,
A., 2004. Effect of low pressures on the survival of
three cocoa pests at 30°C.Journal of Stored
Products Research 40, 499-506.
Food and Fertilizer Technology Center, 2015. Carbon
dioxide fumigation technique to control insect
pests in stored products. Available at:
http://www.agnet.org/htmlarea_file/library/2011071
/pt2004015.pdf. Accessed 30 August 2015.
Mbata, G.N., Johnson, M., Phillips, T.W., Payton, M.,
Mortality of life stages of Cowpea Weevil
(Coleoptera: Bruchidae) exposed to low pressure at
different temperatures. Journal of Economic
Entomology 98, 1070–1075.
Mbata, G.N., Phillips, T.W., 2001a. Prospects of low
pressure for use in the disinfestation of storedproducts.
In: Donahaye, E.J. et al. (Eds), Proceedings
of an International Conference on Controlled
Atmosphere and Fumigation in Stored Products,
Fresno, CA, Executive Printing Services, Clovis, CA,
pp. 285-295.
Mbata, G.N., Phillips, T.W., 2001b. Effects of
temperature and exposure time on mortality of
stored-product insects exposed to low pressure.
Journal of Economic Entomology 94, 1302-1307.
Mbata, G.N., Phillips, T.W., Payton, M., 2004. Mortality
of eggs of stored-product insects held under
vacuum: effects of pressure, temperature, and
exposure time. Journal of Economic Entomology
, 695-702.
Navarro, S., 2006. Modified atmospheres for the
control of stored-product insects and mites. In
Insect Management for Food Storage and
Processing, 105–146. St. Paul: AACC International.
Navarro, S., Calderon, M., 1972. Exposure of Ephestia
cautella (Wlk.) (Lepidoptera, Phycitidae) to low
pressures: Effects on adults. Journal of Stored
Products Research 8, 209-212.
Navarro, S., Calderon, M., 1979. Mode of action of low
atmospheric pressures on Ephestia cautella (Wlk.)
pupae. Separatum EXPERIENTIA 35, 2.
Navarro, S., Donahaye, J.E., Dias, R., Azrieli, A., Rindner,
M., Phillips, T., Noyes, R., Villers, P., Debruin, T.,
Truby, R., Rodriguez, R., 2001. Application of
vacuum in a transportable system for insect
control. In: Donahaye, E.J. et al. (Eds), Proceedings
of an International Conference on Controlled
Atmosphere and Fumigation in Stored Products, 29
October - 3 November 2000, Fresno, CA, Executive
Printing Services, Clovis, CA, pp. 307-315.
Navarro, S., Finkelman, S., Donahaye, E., Dias, R.,
Rindner, M., Azrieli, A., 2002. Integrated storage pest
control methods using vacuum or CO2 in
transportable systems. In: Adler, C. et al. (Eds),
Proceedings of the IOBC WPRS Working Group
“Integrated Protection in Stored Products”, 3-5
September 2001, Lisbon, Portugal, IOBC/WPRS, pp.
-214.
Steuerwald, R., Dierks-Lange, H., Schmitt, S., 2006.
Rapid bioassay for determining the phosphine
tolerance. In: Lorini, I. et al. (Eds), Proceedings of
the Ninth International Working Conference on
Stored Product Protection, 15-18 October 2006,
Campinas, São Paulo, Brazil, Brazilian Post-harvest
Association, Passo Fundo, RS, Brazil, pp. 306-311.
UNEP, 2000. The Montreal protocol on substances that
deplete the ozone layer. Available at:
http://ozone.unep.org/en/treaties-anddecisions/
montreal-protocol-substances-depleteozone-
layer. Accessed 12 August 2015.
Vincent, K., 2015. Probit analysis. Available at:
http://userwww.sfsu.edu/~efc/classes/biol710/prob
it/ProbitAnalysis.pdf. Accessed 17 August 2015.