감귤의 조팝나무 진딧물 및 깍지벌레류에 대한 Petroleum Spray Oil의 방제효과 Efficacy of a petroleum spray oil for the control of citrus pests, spirea aphid (Aphis citricola) and two scales (lcerya purchasi and Planococcus cryptus) in Jeju island원문보기
인축독성 및 잔효성이 낮아 환경친화적인 Petroleum spray oil (PSO, D-C-Tron $Plus^{(R)}$, Caltex Oil Co.) 를 감귤나무에 살포하여 조팝나무진딧물, 이세리아깍지벌레 및 귤애가루깍지벌레에 대한 약효를 검토하였다. 0.33% PSO 의 조팝나무진딧물에 대한 방제가는 처리후 6 일까지는 90% 이상이었으나, 처리 9 일 및 14 일후에는 80% 정도로 대조약제 (furathiocarb, thiamethoxam) 보다 낮았다. PSO (0.33, 0.66, 1 %) 살포후 5 주까지의 이세리아깍지벌레에 대한 방제가는 50% 미만으로 대조약제 (메치온) 보다 크게 낮았으나, 귤애가루깍지벌레에 대한 방제가는 1% PSO 살포시는 95% 로 높았고 0.33% 및 0.66% 살포시에도 $50{\sim}80%$ 를 보였다. 이러한 결과는 약해를 고려하여 0.5% 이하의 농도를 살포할 경우, PSO 는 조팝나무진딧물의 방제는 물론 이세리아 및 애가루깍지벌레의 밀도경감 효과를 얻을 수 있을 것으로 보인다.
인축독성 및 잔효성이 낮아 환경친화적인 Petroleum spray oil (PSO, D-C-Tron $Plus^{(R)}$, Caltex Oil Co.) 를 감귤나무에 살포하여 조팝나무진딧물, 이세리아깍지벌레 및 귤애가루깍지벌레에 대한 약효를 검토하였다. 0.33% PSO 의 조팝나무진딧물에 대한 방제가는 처리후 6 일까지는 90% 이상이었으나, 처리 9 일 및 14 일후에는 80% 정도로 대조약제 (furathiocarb, thiamethoxam) 보다 낮았다. PSO (0.33, 0.66, 1 %) 살포후 5 주까지의 이세리아깍지벌레에 대한 방제가는 50% 미만으로 대조약제 (메치온) 보다 크게 낮았으나, 귤애가루깍지벌레에 대한 방제가는 1% PSO 살포시는 95% 로 높았고 0.33% 및 0.66% 살포시에도 $50{\sim}80%$ 를 보였다. 이러한 결과는 약해를 고려하여 0.5% 이하의 농도를 살포할 경우, PSO 는 조팝나무진딧물의 방제는 물론 이세리아 및 애가루깍지벌레의 밀도경감 효과를 얻을 수 있을 것으로 보인다.
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 trea...
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.
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.
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가설 설정
b)Mean±standard deviation (n=5) followed by the same letters are not significantly different at 5% level by DMRT.
b) Mean±standard deviation flowed by the same letters are not significantly different at 5% level by DMRT.
제안 방법
Spraying was done until run off using a hand-held sprayer. Number of living scales were counted at one day before treatment, 7, 14, 21, 28 and 35 DAT, respectively.
Miyakawa-wase) were used in the study. The treatments were set up with three concentrations of PSO (0.33%, 0.66% and 1.0%), 1, 000 times diluted methion 1000 (check chemical), and water spray (control). These four treatments were randomly allocated to the trees with tliree replicates of one tree each.
대상 데이터
in 2000. Potted 4-year-old citrus trees (man darin, cv. Miyakawa-wase) were used in the study. The treatments were set up with three concentrations of PSO (0.
The PSO tested in this study was nC24 (where n represents normal, C carbon and 24 the number of median equivalent carbon atoms) D-C-Tron Plus® (Caltex Oil Co.) with 50% distillation temperature of 392℃ and C24 paraffinic oil of 98%. The tested PSO contained 0.
성능/효과
Spraying of 0.33% 〜1% PSO (D-C-Tron Plus®) against two scales in this study showed low control value against cottony cushion scale, ranging from 30 to 45%, but high control value against Pianococcus cryptus. In particular, spraying of 1% PSO showed nearly 100% control value similar to the conventional pesticide (methion).
The living rates of cottony-cushion scale in all PSO spraying concentration were significantly lower than the water-sprayed control, but the degree of living rate was much higher than the commercial pesticide, tliiamethoxam, showing nearly 0% (Table 2). Mean while, the control values of all spraying concentration of PSO showed less than 50% and were much lower than thiamethoxam spray throughout the experiment (Fig.
33% PSO significantly suppressed spirea aphid in citrus, although the efficacy of PSO was slightly lower than that of the two conventional pesticides (furathiocab, thiamethoxam). The results of studying suggest that spraying of 0.33 ~ 1.0% PSO not only controls the spirea aphid, but also reduces the density of the two scales (Icerya purchasi and Pianococcus cryptus) on citrus tree in Jeju. Because the efficacy of PSO in the control of the two scales was not high, spraying of PSO as a main control pesticide may not be appropriate.
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