• Korean journal of applied entomology
• /
• v.44 no.3 s.140
• /
• pp.231-235
• /
• 2005

This study was conducted to obtain the optimal spray time for Pseudaulacaspis prunicota (Maskell) (Homoptera: Diaspididae) in early seaon in Jeju. Oviposition time of overwintered females and activity of hatched nymphs of P. prunicola were monitored, and the phenology data were compared with the outputs estimated by a degree-days model of P. pentagona (Targioni-Tozzetti)). Overwintered females of P. prunicola began to lay eggs from mid to late April, and the eggs started to hatch from early May followed by the active migration of the hatched nymphs during mid May. The phenological events of P. prunicola in early season were likely comparable with those of P. pentagona reported in southern Korea and in central Japan. A degree-day model, which predicts the proportion of >50% hatched egg batches of P. pentagona (y=1[exp(-(-a+bx))]; y, proportion; x, degree-days based on $10.5^{\circ}C$ from 1 January; a=-18.80 and b=0.073), accurately described the migration time of P. prunicola hatched nymphs. Thus, it is considered that the degree-day model can be used for predicting the optimal spray time for P. prunicola in early season.

• Landscaping Tree
• /
• v.79 no.3_4
• /
• pp.27-30
• /
• 2004

봄이면 우리의 가슴을 설레게 하는 벚꽃의 연분홍색 자태는 4월을 알리는 봄의 전령으로 우리를 기쁘게 하지만 이를해치는 해충의 종류는 한국수목해충목록집에 424종이 등재되어 있어 인간이 벚꽃을 사랑하는 만큼이나 곤충들도 벚나무류를 무척 좋아 하는가봅니다. 1990년 이후 각 도시의 가로수, 정원수로서 경쟁적으로 식재 관리하고 있는 벚나무류에 대한 주요해충으로 복숭아혹진딧물, 뿔밑깍지벌레, 뽕나무깍지벌레, 공깍지벌레, 벚나무응애 등 흡증성해충을 중심으로 이들 해충에 대하여 생리·생태 및 방제법을 간략하게 소개하고자 한다.