Verification of atmospheric plasma irradiation as an alternative control method for <i>Tribolium castaneum</i> (Herbst)

Hassan, A. M.; Sileem, T. M.; Hassan, R. S.

doi:10.1590/1519-6984.222662

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Brazilian Journal of Biology

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Original Article • Braz. J. Biol. 80 (3) • Jul-Sep 2020 • https://doi.org/10.1590/1519-6984.222662 copy

Verification of atmospheric plasma irradiation as an alternative control method for Tribolium castaneum (Herbst)

Verificação da irradiação plasmática atmosférica como método alternativo de controle para Tribolium castaneum (Herbst)

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Radio frequency plasma, RF plasma, has been applied to a number of industrial applications. Laboratory experiments were conducted to determine the RF plasma potential in Tribolium castaneum (Herbst) control. Three treatment variables: (1) helium or argon plasmas; (2) two power levels (50 and 100 watt); and (3) different RF plasma exposure times (0, 20, 40, 60 and 90 seconds) were examined in this study. The susceptibility of T. castaneum to treatment varies as gas, power level, and the exposure time varies. A positive correlation was found between insect mortality percent in treating larvae as well as treated pupae and exposure time to RF plasma and also the power level of irradiation. The results revealed that no live insects were found after a 90 second, 100 watt helium RF plasma treatment. The survival percents of the adults were developed from treated larvae and treated pupae were significantly reduced by increasing of the exposure time or power level. Obtained data indicated that the treatment with RF plasma might be considered as an environmentally compatible or alternative supplement to the other control methods for stored product-pests management.

Keywords:
RF plasma; irradiation treatment; Tribolium castaneum; mortality; latent effect

Gas type	Power level	Exposure times	% Of pupation	% Of larval mortality	% Of adult emergence	% Of survival from larvae to adulthood
Helium	50watt	0s	96.3 ± 0.41 ^A*	3.7 ± 0.45 ^P	92.8 ± 0.59 ^A	88.8 ± 0.38 ^A
		20s	86.7 ± 0.36 ^D	13.3 ± 0.46 ^O	92.3 ± 0.59 ^B	82.5 ± 0.38 ^AB
		40s	80.5 ± 0.35 ^F	19.5 ± 0.46 ^K	88.4 ± 0.57 ^D	63.3 ± 0.36 ^E
		60s	77.4 ± 0.35 ^G	22.6 ± 0.45 ^J	68.2 ± 0.56 ^L	32.0 ± 0.35 ^FG
		90s	33.4 ± 0.32 ^N	66.6 ± 0.48 ^C	60.0 ± 0.55 ^O	22.0 ± 0.35 ^G
	100watt	0s	96.3 ± 0.41 ^A	3.7 ± 0.45 ^P	92.8 ± 0.59 ^A	88.8 ± 0.38 ^A
		20s	87.6 ± 0.37 ^C	12.4±.046 ^M	78.9 ± 0.57 ^J	62.9 ± 0.36 ^DE
		40s	77.4 ± 0.35 ^G	22.6 ± 0.46 ^J	70.6 ±.057 ^K	57.6 ± 0.36 ^E
		60s	28.6 ± 0.21 ^O	71.4 ± 0.47 ^B	64.7 ± 0.56 ^N	21.7 ± 0.35 ^G
		90s	0.0 ± 0.0 ^P	100.0 ± 0.00^A	0.0 ± 0.0^P	0.0 ± 0.0 ^P
Argon	50watt	0s	96.3 ± 0.41 ^A	3.7 ± 0.45 ^P	92.8 ± 0.59 ^A	88.8 ± 0.38 ^A
		20s	93.0 ± 0.38 ^B	7.0 ± 0.45 ^N	92.3 ± 0.59 ^B	76.7 ± 0.37 ^BC
		40s	84.7 ± 0.31 ^E	15.3 ± 0.46 ^L	85.8 ± 0.58 ^F	75.4 ± 0.37 ^BC
		60s	71.8 ± 0.34 ^{I I}	28.2 ± 0.46 ^H	83.1 ± 0.57 ^H	57.6 ± 0.36 ^E
		90s	53.3 ± 0.33 ^L	46.7 ± 0.49 ^E	82.2 ± 0.57 ^I	36.7 ± 0.35 ^F
	100watt	0s	96.3 ± 0.41 ^A	3.7 ± 0.45 ^P	92.8 ± 0.59 ^A	88.8 ± 0.038 ^A
		20s	76.6 ± 0.35 ^H	23.4 ± 0.46 ^I	91.7 ± 0.59 ^C	84.0 ± 0.038 ^AB
		40s	68.3 ± 0.34 ^J	31.7 ± 0.47 ^G	87.0 ± 0.58 ^E	71.1 ± 0.037 ^CD
		60s	60.6 ± 0.33 ^K	39.4 ± 0.48 ^F	85.0 ± 0.58 ^G	52.3 ± 0.036 ^E
		90s	35.8 ± 0.32 ^M	64.2 ± 0.48 ^D	66.7 ± 0.56 ^M	28.8 ± 0.035 ^FG

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