Impact of triflumuron on reproduction and development of red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) (original) (raw)
Related papers
2011
Confused flour beetle, Tribolium confusum du Val (Col.: Tenebrionidae) is one of the most important stored product pests of flour in Iran. In this research the effects of insect growth regulators (IGRs): teflubenzuron, hexaflumuron and pyriproxyfen on oviposition rate, emergence of adults, repellency effects of 17 days-larvae and adults of confused flour beetle have been studied. The results showed that, the highest and lowest of inhibitory reproduction were observed in teflubenzuron (88.5%) and pyriproxyfen (77.4%), respectively. All IGRs significantly were reduced the oviposition rate of T. confusum.The maximum and minimum of inhibitory emergences of adults were observed in Teflubenzuron (86.26%) and pyriproxyfen (75.73%), respectively. Results showed that, reproduction and adult emergences inhibitories were directly correlated with the IGRs concentrations. Repellency effects of IGRs on adults indicated that, the highest and lowest were recorded for teflubenzuron (48.12%) and pyri...
Journal of Economic Entomology, 2015
Laboratory and field studies were conducted to determine if accumulation of a flour food source or milling debris affected residual efficacy of beta-cyfluthrin for control of Tribolium castaneum (Herbst), the red flour beetle. In the laboratory study, the high label rate of 20 mg active ingredient (AI)/ m 2 gave effective control for 8 wks, regardless of whether or not the concrete was sealed prior to application or the presence of flour contamination. However, with the low label rate of 10 mg AI/m 2 , the flour apparently absorbed the insecticide residues from the treated surface, and sealing the concrete did not have a beneficial effect on efficacy. Two field studies with the low label rate were conducted during autumn of 2012 and 2013 and summer of 2013, using only unsealed concrete. Accumulated milling debris caused a reduction in efficacy in the autumn studies, as shown by increased time to 100% knockdown, decreased mortality, and decreased residual efficacy. There was no such corresponding decrease in residual efficacy in the summer study. Overall, results of both studies show that accumulated food and milling debris can absorb residue of beta-cyfluthrin from a treated surface and have a negative impact on residual efficacy, particularly with the low label rate of 10 mg AI/m 2 .
The efficacy of three fungal pathogens, Isaria fumosorosea, Nomuraea rileyi and Verticillium lecanii alone and their combination with natural diatomaceous earth (DE) and silicagel-O-500 and silica-O-750 evaluated against Tribolium castaneum and Tribolium confusum. Results showed that modified diatoms with Calcium hydroxide (Ca-DE) and modified diatoms with Sodium hydroxide (Na-DE) were the most effective treatments against the two tested insects and achieved the highest mortality percentages. T. castaneum achieved the highest tolerant to tested DEs. Cab-O-Sil-750 gave highest mortality against T. castaneum reached to 89, 50 and 12% at concentrations 1, 0.5 and 0.25 g/kg wheat, respectively. The fungus I. fumosorosea was the most effective alone against T. castaneum. Ca-DE and Na-DE treatments strongly enhanced the potency of the tested fungi I. fumosorosea and N. rileyi. Results showed that T. castaneum was susceptible to N. rileyi. Larvae of T. castaneum were more tolerant to V. lecanii alone. In most cases, DE combinations with tested fungi had synergistic effects, while in T. castaneum modified diatoms with aluminium hydroxide (Al-DE) decreased the efficacy of V. lecanii. Both silica gel and diatoms protected wheat better. The egg production was highly suppressed by combination of Ca-DE followed by Na-DE with tested fungi in comparison to untreated control. The combination of Ca-DE/I. fumosorosea strongly suppressed the number of deposited eggs of T. castaneum (87.5 ± 9.6 eggs/female) in comparison to untreated control (277.0 ± 5.9 eggs/female). The most effective DEs modifications were Ca-DE and Na-DE with insecticidal, repellency or ovicidal effects against T. castaneum and had synergistic effects on the potency of tested fungi.
Journal of Plant Protection and Pathology (Print), 2016
Effects of triflumuron (Baycidal 25%) on newly fifth larval instars of Sopdoptera littoralis were studied by a topical bioassay for the doses of 0.01, 0.1, 1, 5 and 10 µl/larva. The growth inhibition percentages were calculated during the experiment until 72 hours from the treatment, and were ranged between 8.7 to 58.53 %. Larval mortality percentages ranged between 40 and 82.5 %, while it was 2.5% in the control. The results showed reduction in the pupae weight values of S.littoralis, these values were between 239.25 to 178.28 mg while it weighed 250.8 mg in the control. Inhibition of adult formation percentages were calculated from larval stage until the adult formation, were ranged between 57.5, 92.5%, while it was 5% in the control. The histological studies illustrated heavily destruction of the reproductive tract of male when triflumuron were applied. Sex ratio of male (SR) was affected and ranged between 47.3 to 100%. Also, on the other hand, the lethal dose of triflumuron (LD 50 =0.006 µl/Larva) on chitin formation caused inhibition in the larval growth of the cotton leafworm. The chitin formation ratio value displayed 44.96 mg/gm for the control, while it was 15.38 mg/gm with LD 50 =0.006 µl/Larva.
Journal of emerging technologies and innovative research, 2018
Toxicity of insecticides viz. lufenuron 5 EC; flubendiamide 480 SC respectively was tested on different larval stages of Tribolium castenium in lab. In this study , the concentrations of flubendiamide and lufenuron were 5, 10, and 20 μg/ml in Petri dish with 12 sets of treatment and 3 replication of each. Lufenuron and flubendiamide on the various developmental stages of red flour beetle Tribolium castenium was determined by exposing them to different sub-lethal concentration (LC5 , LC10, LC20, LC40) of flubendiamide through diet for 12 hrs, 24 hrs, 48hrs respectively. The observations on mortality of different stages of T. castenium larvae were recorded after 3, 6, 12, 24 and 48 hours of application. The application of lufenuron proved to be comparatively safer with 8 to 16 percent mortality of different larval stage of T.castenium at all intervals. Flubendiamide was found as intermediately toxic in all post treatment intervals. Hatching capacity of flubendiamide and even at sub-lethal concentration shows good larvicidal and ovidicidal activity in case of lufenuron also larvicidal and ovicidal activity was good.
2020
W heat flour represents a significant worldwide food. In many Asian and African countries including Egypt, big quantities of the flour are stored in open shounas and/or shades. Under such conditions, flour is subjected to attack by various biological factors including insects. The tenebrionid beetles such as Tribolium confusum represents an important species of the insect pests of wheat flour. Therefore, the present study aims to investigate the chemical and toxicological properties of wheat flour as affected by flour beetles (Tribolium castaneum) infestation as well as its validity for human consumption. Twenty seven jars, 1 kilogram, of flour (extraction 82%) were used filled with wheat flour 82 % extraction. A100 larvae of Tribolium confusum were put into each jar and 15 jars, not infested, were kept as control. The samples were kept for the trial duration (2, 4, 6, and 8 weeks) at 25 0 C and 60% of relative humidity. At the end of this period, all samples were sieved to recover ...
Journal of entomology and zoology studies, 2017
The evaluation of the efficacy of plant powders on red flour beetle Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) was carried out in Mubi. The plant products were the powders of Khaya ivorensis and Annona senegalensis. Permethrin 0.60% was used as positive control. 1.0g, 2.0g and 3.0g were constituted into four replicates for each of the treatment on 20.0g of sorghum, maize and millet flours. Thereafter, 10 newly emerged adult Tribolium castaneum were added. The effects were noted for their toxicity and suppression of development. The results revealed that the plant products tested were effective when compared with the control, since they significantly recorded higher mortality and also suppressed larval and F1 progeny emergence on different grain flours. Khaya ivorensis performed significantly (P>0.05) better than Annona senegalensis. Therefore, sustainable use of these plant products in the control of weevils on stored foods is recommended especially Khaya ivorensis ...
AFRICAN JOURNAL OF AGRICULTURAL RESEEARCH, 2012
The persistence and insecticidal activity of a commercial biological insecticide Spinosad, based on fermentation product of Actinomycetales bacterium, Saccharopolyspora spinosa (Actinomycetales: Actinomycetaceae) and two plant extracts, namely Neem (Azadirchta indica) and Kanair (Nerium oleander) were evaluated against Tribolium castaneum (Hbst) on stored wheat grains. Five concentrations, namely 0.5, 1.0, 1.5, 2.0 and 2.5% of each insecticide were used at different exposure times, that is, 24, 48, 72 and 168 h. Filter paper dip method was used. Results revealed that Spinosad (Tracer 240 SC) was the best against target pest, with maximum mortality, that is, 55% at 2.5% dose in 168 h exposure time and minimum 16.66% with 0.5% concentration at 24 h exposure time. Neem showed 45% mortality at 168 h exposure time with 2.5% concentration and 16.67% at 0.5% dose at 24 h exposure time followed by Kanair with 38% mortality at maximum application rate and exposure time, that is, 2.5% and 168 h and minimum 15% at minimum application rate, that is, 0.5% at 24 h exposure time. LC 50 values were also calculated using Probit analysis technique. LC 50 values of Neem, Knair and Spinosad after 24, 48, 72 and 168 h interval were determined. LT 50 values of these bioinsecticides interval were also calculated at 2.5% concentration. Results revealed that bio-pesticides are better ways to manage Red flour beetle infestation in stored wheat grains.