For the setting of control timing, the number of overwintering eggs on host plants and population density of Metcalfa pruinosa nymphs and adults was surveyed in a sesame fields. According to a survey of the overwintering eggs density of M. pruinosa on host plants, they were many in the order of Mugunghwa trees, Oak trees, and Acacia trees. Examined sesame branches within the 50cm was not found population densities of M. pruinosa nymphs and adults, and it was also very low in the sticky trap. The peak density of the adult was highest at 0.13 per trap on 11 after being first investigated on July 3 in a string wrap survey, and then decreased. In a sesame fields, it is judged that the control of the M. pruinosa is due to be 35 days after the end of the insect hatching, and that distribution of host plants is more important in the outside region than inside region.

For the setting of control timing, the number of overwintering eggs on host plants and population density of Metcalfa pruinosa nymphs and adults was surveyed in the three peach orchards. According to a survey of the overwintering eggs density (∅2~3㎝, 20㎝ branches) of M. pruinosa on host plants, 221.8 in Mugunghwa trees, 189.3 Oak trees, and 152.7 Acacia trees, and 57.0 Peach showed the number of eggs laid. Examined peach branches within the 50cm (∅1~5cm) was not found population densities of M. pruinosa nymphs and adults, and it was also very low in the sticky trap. The peak density of the adult was highest at 5.4 per trap on August 7 after being first investigated on July 16 in a string wrap survey, and then decreased. In the peach orchard, it is judged that the control of the M. pruinosa is due to be 20 days after the end of the insect hatching, and that distribution of host plants is more important in the outside region than inside region.

미국선녀벌레(Metcalfa pruinosa)는 외래 침입해충으로 조사가 시작된 2009년 이후 발생지역과 발생면적이 계속 증가하여 2018년에는 123개 시군구의 21,154ha에서 발생이 보고되고 있다. 미국선녀벌레는 농경지와 그 주변 산림지에서 활동하기 때문에 정부와 지자체간 협업을 통해 농림지 동시방제를 5월하순경(부화약충 대상)과 7월 중순경(성충 대상) 2회 실시하고 있다. 농촌진흥청에서는 미국선녀벌레의 기생천적인 선녀벌레집게벌(Neodryinus typhlocybae)의 안정적인 도입과 미국선녀벌레에 대한 생물적 방제원으로서 국내 정착을 위해 이탈리아 파도바대학과 국제협력사업을 2017년부터 수행하고 있다. 선녀벌레집게벌은 완주에서 월동이 가능하였으며 6월 초에 50%이상 우화를 하였다. 2018년도에 온실(완주)과 야외(수원, 태안)에서 증식하여 1,000여 개체 이상을 확보하였으며 도입천적의 안정적인 국내 정착과 확산 및 활용 방안에 대해 논의하고자 한다.

This study was performed to establish the control strategies effectively using Eco-friendly agricultural materials (EFAM) and natural enemy when cultivating autumn-type leaf perilla and to investigate the population densities of seasonal major pests such as Tetranychus urticae (two-spotted spider mite, TSSM), Broad mite (Polyphagotarsonemus latus), Aphis egomae, and Pyrausta panopealis. TSSM showed the occurrence in the seedling stage from August to the end of September and controlled using EFAM in the nursery. Broad mites had a low occurrence in October, December, and the following year showed the density of two or more leaves per leaf from February. Aphis egomae was locally prevented around the area of occurrence, and it showed more than five per leaf in October. Pyrausta panopealis seemed to occur from August to September. Aphis egomae is control using high-toxic EFAM before the overwintering and prevents it from using banker plants planted barley in the winter. Pyrausta panopealis is protected by biological pesticides in August registered in the leaf perilla.

Eighty kinds of pesticides registered in the peach and leaf perilla were assessed the efficacy against the 4th nymph stage of citrus flatid planthopper. Plant of Sharon, host plant preferred by citrus flatid planthopper, was cut from 5 to 7 cm and dipped 10 seconds into recommended concentrations of pesticides, respectively, and then dried naturally for the 30 minutes. New shoot of Plant of sharon treated pesticides and 10 to 15 final nymphs of citrus flatid planthopper put together in the 50㎖ tube and the number of live nymphs was investigated after 48 hours. Pesticides showing mortality over 90% were seven, namely, bifenthrin EW, Rhamda-cyhalothrin EC, Clothianidin SC, Benfuracarb SG, Chloropyrifos WP, Bifenthrin+methoxypenozide SC, Chloropyrifos+imidacloprid WP. When the forest surrounding the peach and leaf perilla was occurred and damaged by citrus flatid planthopper, the use of these pesticides is judged to be effective in the control of this pest.

This study was performed to apply and to utilize the digital forecasting information for Integrated Pest Management at pepper field in Chungbuk province. Chemical spray according to the forecasting prediction using FarmIPM and NCPMS were compare to the that of no control and conventional control. Pests such as Oriental tobacco budworm, Western flower thrips, and Cotton aphids were investigated the control effect by the forecasting modeling information at three pepper plots. Damaged fruit ratio (%) of Oriental tobacco budworm was ordered into no treatment (30) > forecasting (20) > conventional (12), but damages by other pest was insignificant. The frequency of forecasting control was ordered into NCPMS (31) > conventional control (17) > FarmIPM (8). Damaged fruit ratio (%) of Oriental tobacco budworm was ordered into no treatment (35.5) > NCPMS (26.1) > FarmIPM (24.6) > conventional (13.9). Density of western flower thrips was higher but had no problematic by the chemical control when it is hard to analyze the damage by cotton aphid occurrence. Damage by cotton aphids has no prediction of forecasting but done with 6th chemical spray, and their damage ratio (%) was ordered into no treatment (67.7) > FarmIPM (16.2) > NCPMS (11.3) > conventional treatment (4.8). At an analysis of economic value, gross profit was highest in FarmIPM and next to NCPMS > conventional control.

The cotton aphid, Aphis gossypii Glover is an important sap-sucking pest of many pant, including cucumber and pepper. The objective of the present study was to determine the effects of sublethal concentrations of two insecticides (imidacloprid and flonicamid) and the action mechanisms on the feeding behavior of A. gossypii. The median lethal concentrations (LC50) of imidacloprid and flonicamid for adult A. gossypii were 2.01 and 1.92 ppm, respectively. The sublethal concentrations of imidacloprid were 0.22 ppm (LC10) and 0.82 ppm (LC30), and those of flonicamid were 0.094 ppm (LC10) and 0.56 ppm (LC30). The developmental period of A. gossypii nymphs at LC30 was 3.6 days for both insecticide which shorter than controls (4.2 days). Adult longevities at LC10 and LC30 of imidacloprid were 15.2 and 13.6 days, respectively. Adult longevity at LC10 and LC30 of flonicamid was 11.1 and 9.9 days, respectively. Control adult longevity was 15.5 days. Total fecundity was decreased at both sublethal concentration of two insecticides. Feeding behavior analysis using an electrical penetration graph showed that sublethal doses of imidacloprid and flonicamid had significant effects on the duration of phloem ingestion. However, higher doses of flonicamid induced starvation by inhibition of phloem ingestion and higher doses of imidacloprid induced contact toxicity rather than inhibition of feeding behavior.

Insecticidal susceptibilities of 16 registered insecticides on each developmental stages of Phthorimaea operculella were investigated and further examined the contact, oral and residual toxicities after chosen from insecticides showing good effect. Mortality, longevity and effect on reproduction of 16 insecticides to P. operculella adults were also investigated. To the eggs and pupae, only spinosad showed 71.1% inhibition rate of egg hatch and 66.7% inhibition rate of emergence. To the 3rd nymphs, fenitrothion (LC50 336.6 ppm), esfenvalerate (LC50 8.6 ppm), ethofenprox (LC50 35.7 ppm), and emamectin benzoate (LC50 0.05 ppm) showed oral toxicity over 90% and esfenvalerate (LC50 0.87 ppm), ethofenprox (LC50 16.5 ppm), emamectin benzoate (LC50 0.53 ppm), and spinosad (LC50 2.48 ppm) showed the contact toxicity over 90%. To the adults, mortalities of insecticides were showed as below: deltamethrin and spinosad showed perfect mortality 48 h after treatment; esfenvalerate, ethofenprox, and thiamethoxam showed 40 - 60% mortalities; but the others are not showed any effect. Fecundities of female adults were inhibited by esfenvalerate, emamectin benzoate, and dinotefuran, compare to that of the control, but there were no statistical differences to that of ethofenprox, benfuracarb, thiamethoxam, clothianidin, and diflubenzuron. Adult longevity was showed no difference compare to that of the control. Residual effect of emamectin benzoate showed perfect insecticidal activity at 14 days after treatment and the next ethofenprox showed over 90% at 7 days after treatment.

The occurrence and rapid range expansion of a fulgorid, Lycorma delicatula(White), has recently been reported in korea. It was previously known to occur in China, Japan, Vietnam and India. The first occurrence fo L. delicatula was reported in 2004 in the Cheonan. It has one generation per year and overwinters as egg masses on the bark of host trees. The number of egg per egg mass was 32.69±6.49. The cumulative ratio of hatchability at different temperature was the highest at 25℃ and the lowest at 10, 30℃. The egg hatchability was investigated in different regions in Chung-buk. Since L. delicatula eggs has been stored in -20±1, 0±1, 5±1℃ conditions for 1 ∼60 days, the cumulative ratio of hatchability was 2% stored in -20±1℃ for 3days, But hatchability was 52, 48% stored in 0±1℃ for 3, 14days and 82, 68% stored in 5±1℃ for 3, 14days. And hatchability was 0% for 60days. By straight regression equation(the growth ratio/treatment degree) the growth zero degree of L. delicatula was 10.4℃. The hatchability of L. delicatula in Cheongwon-gun, Okcheon-gun, Cheongju-city where’s winter lowest temperature was over -19℃ was over 79%. But The hatchability of L. delicatula in Jincheon-gun where’s winter lowest temperature was less than -19℃(continuos two days) was 35%.