This paper presents sequential sampling plans for evaluating the pest density based on complete counts from probe in a rice storage warehouse. Both maize weevil and Indian meal moth population showed negative binomial dispersion patterns in brown rice storage. For cost-effective monitoring and action decision making system, sequential sampling plans by using the sequential probability ratio test (SPRT) were developed for the maize weevil and Indian meal moth in warehouses with 0.8 M/T storage bags. The action threshold for the two insect pests was estimated to 5 insects per ㎏, which was projected by a matrix model. The results show that, using SPRT methods, managers can make decisions using only 20 probe with a minimum risk of incorrect assessment.

This study was conducted to develope the observing methods for density of stink bugs in soybean reproductive stage. The adults and nymphs of bean bug, Riptortus clavatus, red-banded shield bug, Piezodorus hybneri, green stink bug, Nezara antennata, Sole bug, Dolycoris baccarum, and brown marmorated stink bug, Halyomorpha halys were observed by three observing methods such as beating, sweeping net, and visual counting methods in the full bloom (R2), full pod (R4) and beginning maturity (R7) of soybean. As a result, total number of stink bugs observed was the highest with 5,214.2 by beating method, and then was 2,581.8 by visual counting method, and was the lowest with 103.1 by sweeping net method. Total number of stink bugs observed by the beating and visual counting methods was P. hybneri, followed by N. antennata, H. halys, R. clavatus and D. baccarum with clear difference in observed number of each stink bugs while total number of stink bugs observed by sweeping net method was very low in the range of 18 to 23. Accordingly, the observed density of stink bugs exception of R. clavatus adult by beating method was generally high. However, the number of R. clavatus adult was more observed by flushing method than that by beating method from the beginning bloom (R1) to full maturity (R8), and was more observed at morning time than that at afternoon time. Therefore, two observation methods that flushing method for R. clavatus and beating method for the other stink bugs were recommended for the occurring density of stink bugs in soybean because both bean bug and pentatomidae stink bugs have distinct behavior characteristics such as flying and dropping.

청동방아벌레의 발생소장과 생태적 특성을 야외의 망실(670m, 3개동)과 사육실(, RH, L16/DB)내에서 조사하였다. 월동성충은 5월 상순에 발생하기 시작하여 6월 상순에 가장 많이 발생하였으며 6월 하순 이후에는 성충의 발생은 보이지 않았다. 총 마리수에 대한 발생비율은 6월 상순과 5월 하순이 각각 를 차지하여 이 시기에 대부분의 성충이 발생하는 것으로 조사되었다. 산란은 6월 중순부터 시작하였고, 부화는 7월 상순에 시작하였다. 7월 중순에 용화가 시작되어 약 한 달 후인 8월 중순에 성충으로 우화하기 시작하였다. 난기는 23일, 용기는 21일이었으며, 성충의 산란전기는 약 10개월, 유충기는 약 30개월로 추정되었다. 유충은 토양깊이 10-15cm 사이에서 (1997)- (1998)가 분포하였다. 감자포장내 방아벌레 유충의 밀도조사를 위해 6가지 유인미끼(감자조각, 당근조각, 고구마조각, 통밀, 옥수수 알갱이, 밀가루 반죽)를 토양깊이 15 cm에 묻고 5일, 10일 후에 각 미끼별 유인된 마리수를 조사한 결과, 방아벌레 유충을 가장 많이 유인한 미끼재료는 감자조각으로 10일째 회수 시에 개당 평균 1.8마리가 조사되었고, 통밀, 고구마 조각이 각각 1.6, 1.4마리였다. 따라서 감자포장내의 방아벌레 유충의 밀도조사법으로, 파종을 위한 경운 전에 감자조각을 땅속 15cm 깊이에 묻고, 10일 후 회수하여 감자 조각에 유인된 유충의 마리 수를 조사하는 것이 효과적이었다