• Korean journal of applied entomology
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• v.25 no.4 s.69
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• pp.209-213
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• 1986

Dominant aphid species and seasonal fluctuations of the colonizing aphids on apple tree, peach tree, and pear tree were examined without insecticide treatment during $1982{\sim}1984$ in Suweon. The dominant species among the colonizing aphids in each fruit tree were Myzus malisuctus in April-June and Aphis citricola in Aug.-Oct. on apple tree; Myzus persicae in early springtime and Hyalopterus pruni in May-Oct. on peach tree; Sappaphis piri in April-June, Oct. and Aphis citricola in July-Sept. on pear tree. M. malisuctus and A. citricola on apple tree showed 3 peaks a year; the former was early June, late Aug. and early Oct., the latter early June, middle Aug. and late Sept. M. persicae on peach tree showed peak on late May to early June, and H. pruni on middle June and middle Oct. S. piri and A. citricola on pear tree showed 2 peaks a year; the former was late May and late Oct., the latter early June and early Sept.

• Korean journal of applied entomology
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• v.34 no.2
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• pp.89-94
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• 1995

Resistance mechanism of organophosphorus insecticides (OPs) in the spiraea aphid, whose populations were originated from several apple orchards where various OPs were frequently sprayed, was investigated. For Wonju population to which insecticides were not sprayed, resistance ratios (BRs) for pirimicarb, phosphamidon, and demeton S-methyl re 49, 31, and 5, respectively. However, for Yesan population to which OPs were sprayed 5 times, RRs for pirimicarb, phosphamidn, and dementon were 830, 536, and 204, respectively. The esterase activities of Wonju and Yesean populations increased by 44.5 and 92.0% compare to that of Kwagju population. R/S a values (S clone Kwangju population; R clone: Iechon opulation) for acetylcholinesterase (AChE) inhibition (${I}_{50}$) by pirimicarb and phosphamidon were 299.2 and 186.0, respectively. Our results indicate that increase of esterase activity and reduction of AChE sensitivity seemed to contribute insecticide resistance of the spiraea aphid.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.8 no.3
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• pp.110-123
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• 1987

• Korean journal of applied entomology
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• v.32 no.3
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• pp.259-264
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• 1993

The experiment was carried out to investigate Insecticide susceptibility of the spiraea aphid (Aphis citricola) in apple orchards In Korea, using dipping method. Although insecticIde susceptibility vaned with local and seasonal populations, the susceptibility to demeLon S-rnethyl and phosphamidons was different from that Lo the other insecticides. The LCso values were 10 ppm for deltamethrin and chloropyrifos, 103 ~ 629 ppm for demeton S-methy1, acephate, phosphamidon, monocrotophos and vamldothion, 12,200 ppm for EPN, and 1,745 ppm for pirimicarb. 'When Insecticide susceptibility was compared between the S-clone selected from a population on the host plant spiraea and the R-clone selected from a population on the apple tree, the resistance ratio as expressed by RIS ratio of $LC_{50}$ was 78 for phosphamidon and 546 for pirimicarb. Esterase zymogram determined by the agar gel electrophoresIs revealed a significant difference between the clones. The activity of the E2, E5, E6 and E7 of the R-clone was higher than that of the S-clone, It is suggesLed that the Increased esterase activity may be involved in the mechanism of insecticide resistance in the spiraea aphid, although the involvement of other factor(s) may not be ruled out.

• The Korean Journal of Pesticide Science
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• v.5 no.1
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• pp.55-60
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• 2001

The efficacy of petroleum spray oil (PSO; D-C Tron $Plus^{(R)}$) against spirea aphid (Aphis citricola) and two scales (lcerya purchasi and Planococcus cryptus) on citrus was tested in Jeju, Korea. The control value of 0.33% PSO against spirea aphid was over 90% at 3 and 6 days after treatment (DAT), and then decreased to about 80% at 9 and 14 DAT. Spraying of PSO (0.33, 0.66, 1%) against cottony-cushion scale showed a much lower control value (less than 50%) during the investigation period compared to that of the conventional pesticide (Methion). When used against tile scale, Planococcus cryptus, the control value of 1% PSO was 95%, but that of 0.33% and 0.66% PSO only ranged from 50 to 80%, lower than the conventional pesticide. The results of this study, as with a previous study, suggest that spraying of 0.33% and 0.5% PSO not only controls the spirea aphid, but also reduces the density of two scales (lcerya purchasi and Planococcus cryptus) on citrus tree in Jeju, without phytotoxic damage.

• Agrochemical news magazine
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• v.15 no.1 s.118
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• pp.52-57
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• 1994

• The Korean Journal of Pesticide Science
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• v.17 no.4
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• pp.448-453
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• 2013

We investigated the occurrence of major pests, 4 species of moths (Grapholita dimorpha Busck, Carposina sasakii Matsumura, Archips breviplicanus Walsingham, Adoxophyes orana Fischer von Roslerstamm), apple aphid (Aphis spiraecola Patch), two spotted spider mite (Tetranychus urticae Koch) and parasitoids in pear orchard with hairy vetch and cutting weeds in Yesan, Chungnam province during the flowering season and summer depression season of hairy vetch, in 2012 and 2013. The occurrence of 4 species of moths in hairy vetch plot and cutting weeds (major is finger grass, Digitaria sanguinalis, 80%) were little different but in case of apple aphid, the density in hairy vetch plot was just 95 aphids per stem at 20th June but low after then. The density of two spotted spider mite on pear leaf in hairy vetch plot was lower than in cutting weeds plot significantly. The number of parasitoids collected in hairy vetch plot during flowering season (May and June) were 398 and 798 in 2012 and 2013, respectively. The number of parasitoids collected in hairy vetch plot during summer depression season (July and August) were 114 and 172, respectively. But in cutting weeds plot, 9 and 22 in May and June, 8 and 5 in July and August. We didn't know either hairy vetch in pear orchard affected the occurrence of 4 species of moths, apple aphid and two spotted spider mite or not but was acted to be favorable for wasps, the natural enemies on the contrary. The improvement of chemical control systems through the selection of low chemicals to natural enemies with cover and green manure plants would turn effective pest management into a possibility.

• Korean journal of applied entomology
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• v.39 no.4
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• pp.267-274
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• 2000

As the pest of the citrus in Cheju, 69 insect species and 5 animal species were investigated during 1996 to 1998. Of these, Panonychus citri, Phyllocnistis citrella, Aphis citricola, Aphis gossypii and Frankliniella occidentalis are major pests. Especially, F. occidentalis and Peridroma saucia are very important species because of increasing damage. The number of pests species injuring leaf, branch, fruit and flower of the citrus are 36, 16, 41 and 2 species respectively. The rate of damaged fruits by pests is 20.5% in 1997 and 18.6% in 1998 and the rate of bad quality fruits is 6.4% and 6.7% respectively.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.6 no.11
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• pp.2-11
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• 1985

과수농사를 짓는데 있어서 어느 해이던 간에 병해충의 발생이 없는 해는 없다. 올해 역시 예년과 마찬가지로 각종 병해충이 발생되었던 한해였다. ''70년도부터 ''85년도까지의 주요 병해충 발생양상을 보면, 점차 증가하고 있는 병해로 사과반점낙엽병과 부패병이 있는데, 이들 병은 ''70년대초에는 거의 무시할 정도의 발생을 보인 병들로 ''78년이후 급증하는 병이며, 해충은 점박이응애, 사과굴나방, 조팝나무진딧물, 포도호랑하늘소 같은 것들로 이들 해충은 현재 농약만으로의 방제가 어려운 상태에 있다. 이와는 반대로 점차 그 발생이 감소하고 있는 병해충은 ''70년초 심하였던 배나무적성병, 복숭아축엽병으로 ''75$\~$''80년도에 와서 거의 미미한 발생을 보이고 있다. 반면 예나 지금이나 지속적인 발생으로 과수재배농가에 피해를 주고 있는 것으로 사과부란병, 복숭아세균성천공병, 심식충류, 잎말이나방류, 깍지벌레류 등이 있다. 이들중 올해 가장 문제가 되었던 것은 사과탄저병으로 금년도의 기상조건이 발병에 좋은 조건이었고, 방제시기에 일기가 불순하여 충실한 방제를 하지 못한 관계로 더욱 심하였다.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2003.07a
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• pp.440-446
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• 2003

농산물의 품질 향상과 생산성 증대를 위해 농약의 적절한 사용이 필요하다. 그러나 농약을 적절히 사용해도 수확 농산물의 표면이나 내부에는 농약이 잔류할 가능성이 항상 있다. 농약의 과다한 잔류는 국민 보건상 커다란 문제가 될 수 있으므로 농약의 잔류량을 신속히 측정할 수 있는 분석법이 절실히 요구되고 있다(박, 2003). 살충제 Imidacloprid는 유기인계 살충제로 해충에 전신마비, 이완, 활동성 저하 등을 일으켜 박멸한다. 국내에서는 귤굴나방, 조팝나무 진딧물, 벼멸구, 굼벵이 류 등의 방제를 위해 감귤, 사과, 고추, 배, 장미, 복숭아 및 벼농사에 광범위하게 사용되고 있다(Bayer CropScience-Korea, 2002). (중략)