The Diversity And Abundance Of Leafaud Planthopper (Auchenorrhyncha: Hemiptera) Along With Weeds In Rice Field Ecosystem In South Rantau Of Labuhan Batu Regency

ABSTRACT: The  aim  of  this  research  is  to  find  out  the  diversity,  abundance,  and  dominance  of  leafaud  planthopper (Auchenorrhyncha:  Hemiptera)  along  with  the  types  of  weeds  grow  in  rice  field  ecosystem  in  South Rantau of Labuhan Batu  regency. This research was conducted by using purposive random sampling by using insect net. The collection of hopper was done by swinging the insect net for 50 times that took place in north, south, middle, east and south so that the amount of the sampli ng was 250 swings. The result of this research showed that there were 6 types of rice pests in vegetation period until stublade field in south Rantau  of  Labuhan  Batu  regency.  They were  :  Nilaparvata  lugens,  Nephotettix  sp,  Cofana  spectra,  Recilia dorsalis, Thaia sp, Cicadulina bipunctata. The highest abundance was found in Nilaparvata lugens with 407 individuals, Nephotettix sp with 32 individuals, Cofana spectra with 38 individuals, Recilia dorsalis with 26 individuals,  Thaia  sp  with  19  individuals,   and  Cicadulina  bipunctata  with  only  1  individual,  with  low diversity index, it was 0,1075. While the weeds found in south Rantau of Labuhan Batu regency were 5 types,  they  were  Cyperus  iria  ,Cyperus  rotundus,Papalum  distichum,  Alternanthera  philoxeroides,  Cyperus pilosus. The highest density was found in Cyperus iria weed, with total 25%, whilw the lowest density was found  in  Papalum  distichum  with  total  only  10%.  The  highest  presence  frequency  was  found in  Cyperus iria, Cyperus rotundus,  Papalum distichum, Alternanthera philoxeroides  with total 20%, while  the  lowest presence  frequency  was  found  in  Cyperus  pilosus  with  total  16%.  The  highest  dominance  was  found  in Cyperus rotundus  with total 23.34%, while the lowest dominance was found in  Cyperus pilosus  with total 15.83%, and the highest important value index was found in  Cyperus rotundus  with total 64.24%, while the lowest important value index was found in Papalum distichum with total 52.69%.
Keywords: Diversity, abundance, dominance, leafaud planthopper
Penulis: NIRWANA FAZRI HARAHAP
Kode Jurnal: jpbiologidd150353

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