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Search Results: 1 - 10 of 64 matches for " Tribolium casteneum hebrst "
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Pesticidal Activity of a Novel Coumestan Derivative Isolated from Psoralea corylifolia Linn. Against Tribolium casteneum Herbst. Adults and Larvae (Coleptera:Tenebrionidae)
N.A. Khatune,M.E. Islam,M.A.A. Rahman,M.A. Baki
Journal of Agronomy , 2002,
Abstract: The pure compound, 6-(-3-methylbut-2-enyl)-6′-7-dihydroxycoumestan (1) isolated from the chloroform extract of the seeds of Psoralea corylifolia Linn. was evaluated for the pesticidal activity against both adults and different instars of Tribolium casteneum Hebrst. under laboratory conditions. The LD50 values for the compound were 910.34, 620.47, 388.45 and 1159.87, 714.88, 404.26 and 1395.70, 740.75, 493.97 and 1605.34, 835.61, 565.83 and 1652.84, 916.79, 729.50 and 1764.32, 994.16, 784.09 and 1678.52, 992.04, 795.67 and 2350.41, 1395.70, 985.12 ppm for the 1st, 2nd, 3rd, 4th, 5th, 6th, adult male and female, respectively at 24, 48 and 72 h post exposure. These results demonstrated that the earlier instars were more sensitive to the compound than those of late instars those follow to those of individual adults.
Evaluación de la acción insecticida de la rapanona sobre Tribolium castaneum (Herbst)
Chavez Germán,Nu?ez Fernando,Calle Jairo
Acta Biológica Colombiana , 1992,
Abstract: Experiments were carried out to detect and estimate the insect-killing effect of rapanone on the flour beetle T.castaneum. Two kinds ofessays were made: by ingestion and by contacto It was proved that rapanone has insecticide activity on T. castaneum. Relatively high LD50 were determined, in comprarison with those of conventional commercial insecticides. An inverse proportionality, between doses of rapanone and the mean productivity, was also found; adose of 7000 mg rapanone per kg standard culture medium is enough to exterminate, almost completely, a population of T. castaneum in one generation. Se realizaron experimentos para detectar y cuantificar efectos insecticidas de la rapa nona sobre el escarabajo de la harina, Tribolium castaneum. Las pruebas fueron de dos clases: por ingestión y por contacto. Se comprobó que la rapanona tiene propiedades insecticidas sobre T. castaneum. Las toxicidades agudas, medidas en términos de DL50 fueron relativamente altas comparadas con insecticidas sintéticos comerciales. También se encontró una proporcionalidad inversa entre dosis de rapanona y productividad promedio; una dosis de 7000 mg de rapanona por kilo de alimento, es suficiente para exterminar casi del todo una poblaci6n de T.castaneum en una sola generación.
Differential preference of colored surface in Tribolium castaneum (Herbst)
AMS Reza,S Parween
Invertebrate Survival Journal , 2006,
Abstract: Insects show color preferences mostly to those which resembles the color of foliage, flower or even their hosts. In the present study observations were made to determine vision towards different colored surfaces in young (second instar), and advanced (fourth instar) larvae, and adults of Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae). The larva and adult beetles showed significant color preferences when given a choice between white (control) and colored surfaces at 24- and 48-h exposures. The second instar larvae were more attracted by yellow and pink than green surfaces. The fourth instar larvae did not show any significant preference between white and colored surfaces at 24-h exposure, but avoided red and pink surfaces (P>0.05) and had a marginal choice for black (P<0.05). The adults avoided green significantly at both exposure times and pink at 48-h exposure, but was moderately attracted by black (P<0.05) at both exposure times.
The Bioactivity of Eugenol Against the Red Flour Beetle Tribolium castaneum
HAN Qun-xin,HUANG Shou-shan
Journal of Chongqing Normal University , 2009,
Abstract: Eugenol is one of main constituents of medicinal material Syzygium aromaticum, and Tribolium castaneum( red flour beetle, RFB)is one of the most important stored-product insects. The bioactivity of eugenol on RFB is tested with normal bioactivity technique such as topical application and fumigant methods. The results show that treated with eugenol oil, the egg of RFB can not complete its life history. Furthermore, different developmental stages of RFB egghave different sensityvity to eugenol. Under the condition of (31±)℃ and 50%-85%, the egg at the age of about 72 h is the most sensitive to eugenol, and even at the concentration of 6uL/mL,it cancompletely inhibit the egg hatching of RFB. The eugenol has distinctively contact poison to larva and adult. The LC50 of larva and adnlt respectively are 218.999 9 uL/mL and 363.077 4 uL/mL, which mean that the larva ismore sensitive to eugenol than to adult, and the contact poison of eugenol to larva is higher than to adult. The eugenol also has apparently repellent activity to adult and fumigant poison to larva and adult. When adult is treated with concentration of 2 uL/mL eugenol for 3 h , the repellent efficacy of eugenol can reach 93.3%, which is the highest repellent grade V.
Efeitos da radia??o gama do Cobalto-60 em ovos de Tribolium castaneum (Herbst., 1797) (Coleoptera: Tenebrionidae)
Fontes, L. S.;Arthur, V.;
Scientia Agricola , 1994, DOI: 10.1590/S0103-90161994000300004
Abstract: the objective of this research was to verify the effects of gamma radiation of a cobalt-60 source on eggs of the red flour beetle tribolium castaneum (herbst., 1797). the used dose rate was 1.28 kgy per hour, and the irradiated insects were kept under controlled environment condition: 25 ± 2°c and 70 ± 5% relative humidity. for eggs the sterilizing and lethal dose were respectively, 20 and 30 gy.
Effects of the Gamma Radiations and Malathion on Confused Flour Beetle, Tribolium confusum J. du Val
Abdurrahman Ayvaz,Fatma Ozturk,Kadir Yaray,Eray Karahacio lu
Pakistan Journal of Biological Sciences , 2002,
Abstract: In this study, effects of gamma radiations and malathion on the flour beetle, Tribolium confusum were studied. Survival of adults after irradiation was decreased with increasing dos of both irradiation and malathion treatment. In adult irradiation LD50 and LD99 values were estimated as 94.62 and 198.87 Gy, respectively. In malathion treatment LD50 and LD99 values were determined as 0.012 mg/cm2 and 0.131 mg/cm2 for adults.
Antixenosis Test on Red Flour Beetle Tribolium castaneum Herbst. (Coleoptera; Tenebrionidae) Against Different Stored Product Commodities under Lab. Conditions
Ibrar-ul-Hassan Akhtar,Muhammad Aslam
Pakistan Journal of Biological Sciences , 2003,
Abstract: Research was conducted to determine the preference and non-preference behaviour of red flour beetle against wheat, rice, paddy and sunflower crushed grains under laboratory conditions in university of Arid Agriculture Rawalpindi, Pakistan during 2000. In the antixenosis experiment, the red flour beetles were observed at 24 h interval. Red flour beetle had shown highest preference to rice crushed grains with mean 9.2500+1.8875, medium preference to paddy crushed grains with mean value 5.2500+2.7500 and least preference to wheat and sunflower with mean value 1.5000+0.5000 and 1.5000+0.8660 respectively.
Antifeedant Diterpenoids against Tribolium castaneum from the Stems and Twigs of Ceriops tagal (Rhizophoraceae)
Shu Shan Du,Cheng Fang Wang,Jing Li,Hai Ming Zhang,Qi Zhi Liu,Zhi Long Liu,Zhi Wei Deng
Molecules , 2011, DOI: 10.3390/molecules16076060
Abstract: The screening of several Chinese mangrove plants for insecticidal principles showed that ethanol extract of Ceriops tagal stems and twigs possessed significant feeding deterrent activity against the red flour beetle, Tribolium castaneum (Family: Rhizophoraceae). From the ethanol extract, three feeding deterrent diterpenoids were isolated by bioassay-guided fractionation. The compounds were identified as tagalsin A, B, and H on the basis of their phytochemical and spectral data. Tagalsin A, B, and H exhibited strong feeding deterrent activity against T. castaneum adults with EC50 values of 375.3 ppm, 277.3 ppm, and 285.45 ppm, respectively.
Experimental study of the efficiency of a reduced index in Tribolium
José Campo, Herminio Turrado
Genetics Selection Evolution , 2000, DOI: 10.1186/1297-9686-32-5-501
Abstract: (To access the full article, please see PDF)
Diatomaceous earth effects on weevils with different susceptibility standard to phosphine
Concei??o, Patrícia M. da;Faroni, Lêda R. A.;Sousa, Adalberto H.;Pimentel, Marco A. G.;Freitas, Romenique S.;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2012, DOI: 10.1590/S1415-43662012000300012
Abstract: the aim of this study was to evaluate the insecticide activity of diatomaceous earth (de), at different temperatures, on two populations of tribolium castaneum and rhyzopertha dominica previously diagnosed as resistant and susceptible to phosphine. the efficiency of de in the control of the insects was evaluated at temperatures of 20, 25, 30, 35 and 40 ± 2 oc. the experiments were accomplished in petri dishes containing 35 g of whole-wheat grain treated with de in the dose of 1.0 kg t-1. the control was constituted by untreated wheat grain. each petri dish was infested with 30 adult insects. insect mortality was registered seven days after the beginning of the bioassays. the experiment was conducted in a completely randomized design with three replications. the populations of t. castaneum and r. dominica, respectively, resistant and susceptible to phosphine have similar susceptibility patterns. the mortality of two populations of t. castaneum increased with increasing temperature. for r. dominica, the mortality did not change with the temperature.
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