1.TITLE Daily activity pattern and population dynamic of fruit fly Bactrocera dorsalis complex on citrus plantation at Karo Highland district-North Sumatera Province

2.AUTHOR Binari Manurung Puji Prastowo Emmi Ebrina Tarigan

3.TIME J. HPT Tropika. ISSN 1411 7525 Vol. 12, No. 2 : 103 110, September 2012

4.SITE In Karo Highland district of North Sumatera Province

5.SCOPE Diversity of species Bactrocera dorsalis and the effect of methyl eugenol in the control of fruit fly Bactrocera dorsalis populations that attack citrus plants in karo highland district.

6.VARIABEL In the daily activity patterns, research variable is the number of fruit fly Bactrocera dorsalis complex are caught in a trap per two hours and is expressed in the proportion (%). To determine the significance of differences in time fruit fly activity in the morning, afternoon and evening used the Kruskal-Wallis test. In abundance and population dynamics, research variable is the number of Bactrocera dorsalis complex is trapped by four days for 17 weeks of the study. With these data the population dynamics of Bactrocera dorsalis complex during the 17 weeks of observation can be known, as well as the timing of the peak population. The significance of differences in the abundance of fruit flies in two citrus crops tested using the t test, whereas differences in population dynamics with correlation analysis of governance levels. Climate data such as temperature, rainfall and number of days of rainfall from the Meteorology and Geophysics Agency (BMG) local (Bluebird Kuta station) is used to determine its influence on the abundance and population dynamics of fruit flies. In this case the test is done by using multiple regression test phases.

7.METHOD In the Daily Activity Patterns, trapping fruit fly is done by using a type of Steiner traps that have been modified, in the form of bottles of mineral water 1500 ml size that of onethe edges modified such that it can serve as an entrance for fruit flies On the wires contained in thethe bottle is hung cotton for the thumb and a few drops of methyl eugenol decoy substance four drops. Traps were hung on citrus trees at aheight of 1.5 meters from the ground. The number of traps used as many as 20 pieces. Trapping takes place from 06.00 until 18.00. Trapping is donea once week from April to May 2011, so that in total do eight repetitions. The identification of fruit flies in the laboratory is done with the aid of a binocular stereo microscope brand Olympus SZ 51. In Abundance and Population Dynamics, the research approach is based on a modification of the method steiner trap. In this case, each of the two citrus crops installed 20 traps in the form of a bottle of mineral water mark. In cotton hanging the trap spilled four drops of methyl eugenol that acts as a decoy agent for fruit flies. Furthermore traps placed at a height of 1.5 m from the ground. After four days, the fruit flies are trapped captured and taken to the laboratory for further sorted, identified and counted the numbers. Fruit fly trapping is done on a weekly basis first and third week of March to November 2011, bringing the total number of sampling 17 times. During the period of trapping of fruit flies, citrus fruit maturity level in the field is also observed and recorded. Identification and counting fruit flies made as to the method of daily activity patterns over.

8.RESULTSDaily activity patterns according liou & chen yen and the threshold temperature 18 degrees celsius. About a fruit flys body according to the meteorological and geophysics agency (BMG) local average temperature in the morning in the highland district karo in april and may (when research is conducted) was 16,9 to 17,3 during the day from 22,9 to 23,5 degrees celsius and in the afternoon from 19,1 to 19,4 degrees celsius.Abundance and population dynamics based on field observations there seems to be a relationship between the number of fruit flies are caught with a phase of growth and development of citrus plants or in other words the degree of ripeness citrus fruits. The highest abundance was abtained along with citrus fruit size of a baseball and a yellowish green color while the lowest abundance occurs when a small amount of citrus fruits of a marble and still greenish.

9.CONCLUSION Bactrocera dorsalis complex of fruit flies on citrus crops in the karo highland district North Sumatera Province active in the morning at 10:00 to 12:00 pm. Population abundance peak occurred in june until the month of july in conjunction with the occurrence of citrus fruit ripening period and the relatively small number of rainy days and rainfall. Population dynamics of fruit fly Bactrocera dorsalis complex in two locations were investigated citrus crop showed relatively similar pattern. The number of rainy days and local rainfall together negatively correlated to the abundance and population dynamics of fruit flies.

10.SUGGESTION In this research should determine the pattern of daily activity, abundance and population dynamics of fruit flies in conjunction with the maturity level of citrus fruits and know the relationship of environmental factors.

Artikel Review Entomology

Daily activity pattern and population dynamic of fruit fly Bactrocera dorsalis complex on citrus plantation at Karo Highland district-North Sumatera Province

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NAMA: SARI YULIANA SIHOMBINGNIM : 4133141072KELAS: BIOLOGI DIK A 2013MATA KULIAH: ENTOMOLOGI

FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAMUNIVERSITAS NEGERI MEDAN2015