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Honeybee (Apis cerana) Collapse in Korea by Sacbrood Virus
Yong Soo Choi,Ha Sik Sim,Hye Kyung Kim,Gyu Ho Byuon,Tran van Toan,Myeong Lyeol Lee 한국응용곤충학회 2014 한국응용곤충학회 학술대회논문집 Vol.2014 No.10
South Korea has over 38 millions of managed honey bee (Apis cerana) colonies before 2009 years ago, which produce the highest quantity of honey in the Korea; however, almost colony (99%) were collapsed by Korean Sacbrood Virus (KSBV) in South Korea. Korean Sacbrood Virus (KSBV) is the pathogen of A. cerana Sacbrood disease, which poses a serious threat to honeybee A. cerana, and tends to cause bee colony and even the whole apiary collapse. Colony collapse of A. cerana was first reported on the Pyeong-Chang of the South Korea in 2009. Symptoms of KSBV include the rapid transmission of larval stage honeybees (A. cerana), many dead larvae found in the bottom of hive and comb. Honeybees (A. cerana) are a very important species because they provide a number of pollination services for various ecosystems in some provinces (ex. jeon-nam, jeon-buk province). They are also extremely important organisms within human society, both agriculturally and economically. The fact that a direct cause has been determined suggests that colony collapse is a complex problem with a combination of natural and anthropogenic factors. Possible instigators of colony collapse include: wax moth, viral and fungal diseases, increased population, decreased genetic diversity, climate changing and a variety of other factors. The interaction among these potential causes may be resulting in immunity loss for honeybees and the increased likelihood of collapse.
Measurement for Biological Controlling of Sacbrood virus on Honey Bee (Apis cerana)
Tran Van Toan,Myeong Lyeol Lee,Ha Sik Sim,Hye Kyung Kim,Gyu Ho Byuon,Yong Soo Choi 한국응용곤충학회 2014 한국응용곤충학회 학술대회논문집 Vol.2014 No.10
Sacbrood disease is a viral disease on honey bee larvae Apis cerana. Diseased larvae fail to pupae and to be dead at old larvae and pre-pupae stage. Currently, there is no remedy to control sacbrood disease. In this study we conducted to observe sacbrood disease on Apis cerana colonies from June to September, 2014 at the A. cerana apiary of NAAS, and using biological measure to treat this disease. Our study results were showed that sacbrood disease infected A. cerana colonies in all months of observation. The percentage of infected colonies was from 33.3% up to 100%. Controlling sacbrood disease by requeen measure, the percentage of recovered colonies was 57.1 % while of this by cage queen measure was only 28.6 %.