• Korean journal of applied entomology
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• v.36 no.3
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• pp.270-276
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• 1997

Bait formulations containing 50% micro-capsuled fenitrothion, 2.0% hydramethylnon or 0.8% chlorpyrifos were evaluated in an 8 week field experiment against German cockroach, Blattella germanica(L). In German cockroach infested 15 restaurants, micro-capsuled fenitrothion (avg. 82.8%) was more effective at reducing adult German cockroach populations than chlorpyrifos (avg. 68.4%), but was about equally as effective as hydramethylnon(avg. 86.1%). The baits of micro-capsuled fenitrothion (avg. 76.5%), hydramethylnon (avg. 82.8%) and chlorpyrifos (avg. 74.9%) almost equally reduced nymphal German cockroach populations in the field. Most baits remained in the bait stations at the heavily infested restaurants after the 8 week treatments. However, the contents of hydramethylnon baits had been subject to significantly greatest consumption (0.72g) and the remaining bait was on the average of 57% by German cockroaches. It was assumed that the previous phenomenon of extra consumption of bait was explained by the infesting cockroaches continuously taking these baits because of the mode of action, the bait food material and the population densities of German cockroaches.

• Korean journal of applied entomology
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• v.32 no.1
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• pp.24-29
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• 1993

Experiments were conducted to study effects of different bioassay methods on toxicity to the German cockroach (Blattella germanica L.) ith six insecticides. For male adults, by dry film method, the {TEX}$LC_{50}${/TEX} value of chlorpyrifos. fenvalerate, propoxur, permethin, DDVP, and hydramethylnon was 1.79, 1.87, 3.04, 4.37, 32.72, and 270.81 ppm, respectively and the same tendency was shown in the female. For male adults, by topical micro-application method, the {TEX}$LD_{50}${/TEX} value of DDVP and fenvalerate, chlorpyrifls, permethrin, propoxur, hydramethylnon was 2.63, 3.79, 4.51, 6.73, 44.99 $\mu\textrm{g}$/g, respectively and the same tendency was shown in the female. From the diet toxicity method against male adults, the CT value (Concentration%$\times${TEX}$LT_{50}${/TEX}) showed that chlorpyrifos was rapid effective and hydramethylnon was residual effective.

• Korean journal of applied entomology
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• v.43 no.3 s.136
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• pp.241-247
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• 2004

Susceptibility of Blattella germanica male adults to 61 commercial insecticides was evaluated by diet dipping method. Among them three insecticides of dichlorvos, fenitrothion, and fipronil showed over $90\%$ mortality. The insect was more susceptible to dichlorvos and fenitrothion in filter paper contact method than in diet dipping one, but fipronil was vice versa. Toxicities of the three chemicals were evaluated by application parts of the such as head, thorax, abdomen, and legs. Dichlorvos and fenitrothion were more toxic when applied to head, and flpronil was thorax. $LT_{50}$ values by diet dipping method showed that fenitrothion and fipronil acted more rapidly than boric acid and hydramethylnon. The values of the former two were 1.05 and 0.98 days, and those of the latter two were 3.92 and 2.26 days, respectively.

• The Korean Journal of Pesticide Science
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• v.10 no.3
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• pp.218-224
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• 2006

Toxicities of 34 agricultural insecticides was tested against Monomorium pharaonis workers by diet dipping method. Ten insecticides among them, bifenthrin, chlorpyrifos, chlorpyrifos-methyl, cypermethrin, dichlorvos, fenthion, fenitrothion, methidathion, pirimifos-methyl, and phenthoate showed 100% rapid mortality. $LC_{50}$ (ppm) values of selected insecticides were appeared on the order of pirimifos-methyl (0.33), chlorpyrifos-methyl (0.76), phenthoate (1.70), bifenthrin (1.78), dichlorvos (2.50), cypermethrin (9.92), chlorpyrifos (22.21), fenitrothion (36.58), fenthion (40.96), and methidathion (64.34). $LT_{50}$ (day) values by diet dipping method showed that dichlorvos, benfuracarb and cypermethrin acted more rapid than boric acid and hydramethylnon. The values of the former three were 0.25, 0.38 and 0.27 days, and those of the latter two were 3.4 and 2.6 days, respectively. In persistance effect tests, chlorpyrifos-methyl, fenthion and methidathion showed over 90% insecticidal activity for 13 days.

• Korean journal of applied entomology
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• v.60 no.2
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• pp.185-191
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• 2021

A Quarantine Pest Research Facility (QPRF) had been build in Animal and Plant Quarantine Agency and designed to ensure alien pests are safety contained inside the laboratory. Functions of QPRF including insect rearing, research, and physical containment facility were verified to check suitability as a research laboratory using the beet armyworm, Spodoptera exigua. As insect rearing and laboratory facility, S. exigua completed its development for 32.2 days at 25℃. Egg hatching, pupation, and adult eclosion showed 80, 86.6, and 90%. Two pesticides, fluxametamide and hydramethylnon showed high susceptibility against S. exigua larvae by spraying and dipping methods. As physical containment facility, male adults, which were artificially released from laboratory, did not capture in delta trap installed sex pheromone lure during winter season. Based on these results, QPRF will be used for study on alien insect species.

• Journal of environmental and Sanitary engineering
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• v.7 no.2
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• pp.129-140
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• 1992

Rats and Cockroaches are the most problematic pests of our living environment, Rats generally fall under three categories, namely, the Norway rats, the roof rats and the mouses, Among these three types, the roof rats are increasing rapidly in number and their habitats are spreading quickly in the city area, where as the Norway rats are decreasing both in number and habitat. There are numerous damages that these pests create in our society, The rat induce damages to computers and other information processing equipments, sometimes cause light-out, and other financial losses and other sanitary problems. The cockroaches, apart from inducing serious sanitary problems, is an insect that creates insectophobia. decently, it has been revealed that cockroaches are also the main carriers of allergic diseases. Among the pesticides employed against rats in Korea, Beta - fluoro acetate(1080) was initially used after the National Liberalization. Later, the Korean government imported anticoagulant rodenticide for its control. This was followed by a brief, unsuccessful utilization of Zinc Phosphide. Since the begin of 1980s, with the advent of pest control companies, first generation anticoagulant rodenticide were developed in Korea and recently followed by a widespread use of pesticide that utilizes second generation anticoagulant material, the "Brodifacoum" . Among insecticides employed against cockroaches, "Fenitrothion" "Dusban" "DDVP" "Diazinon" and others have been used. They were gradually being replaced by the use of synthesised pyrethroid insecticides until recently. Today there is a wide spread use of bait poisons, the "hydramethylnon" Nevertheless, full prevention and control can not be realized with the sole use of the pesticides. In the future, hygine and proofing, combined with affective pest management, must be incorporated in order to bring about more satisfactory and fruitful preventive measures.

• The Korean Journal of Pesticide Science
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• v.8 no.3
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• pp.210-219
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• 2004

Susceptibility of Periplaneta americana male adults to 61 commercial insecticides was evaluated by diet dipping method. Among them eight insecticides of dichlorvos, benfuracarb, cypermethrin, deltamethrin, fenpropathrin, $\zeta$-cypermethrin, $\lambda$-cyhalothrin and fipronil showed 100% mortality. The insect was more susceptible to dichlorvos and fenpropathrin in filter paper contact method than in diet dipping one, but benfuracarb was vice versa. Toxicities of the seven chemicals were evaluated by application parts of the such as head, thorax, abdomen, and legs. Dichlorvos, benfuracarb and $\lambda$-cyhalothrin were more toxic when applied to head, and deltamethrin, fenpropathrin and cypermethrin were abdomen. $LT_{50}$ values by diet dipping method showed that dichlorvos, benfuracarb and $\lambda$-cyhalothrin acted more rapidly than boric acid and hydramethylnon. The values of the former three were 0.10, 0.29 and 0.12 days, and those of the latter two were 6.2 and 4.8 days, respectively.

• Korean journal of applied entomology
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• v.59 no.1
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• pp.5-13
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• 2020

Cockroaches are a not only nuisance insects but also have medical importance as they mechanically propagate various pathogens. To date, baits have been widely suggested for use in cockroach control. In this study, we investigated the insecticidal effects of three Korean baits-Korea Combat Ultra Slim (K-CUS), Korea Combat Power (K-CP), and Korea Zaps Dual Bait (K-ZDB)-and three US baits-US Combat Source Kill Max (US-CSKM), US Hot Shot MaxAttrax Roach Bait (US-HSM), and US Raid Double Control Small Roach Bait (US-RDC)-on the German cockroach (Blattella germanica). Among the six baits, three (K-CUS, K-CP, and US-CSKM), the main active ingredients of fipronil, showed rapid and strong insecticidal efficacy. In addition, we compared the persistence of the insecticidal effects of K-CUS and K-CP 6 months and 12 months after initial opening. Insecticidal effects of both baits decreased over time, but the mortality rates of cockroaches exposed to 6-month- and 12-month-aged baits were over 90%, suggesting that these baits can maintain their insecticidal effect for at least one year after indoor installation.