Uji preferensi Adalia Bipunctata terhadap tiga spesies guima air beserta kombinasinya berdasarkan bau

ABSTRAK

Penelitian ini bertujuan untuk mengetahui tingkat preferensi Adalia bipunctata terhadap tiga spesies gulma air beserta kombinasinya. Penelitian ini dilaksanakan mulai bulan Oktober sampai Desember 2001 di Laboratorium Ekologi dan Diversitas Hewan, Jurusan Biologi dan Ilmu Pengetahuan Alam, Universitas Brawijaya Malang.

Uji preferensi dilakukan dengan menggunakan serangga Adalia bipunctata yang ditangkap langsung dari alam, tiga spesies gulma air {Ipomoea aquatika F., Marsilea crenata F., Pistia statiotes L. ) yang diuji dengan rangkaian alat: olfactometer 4 lengan. Persentase ketertarikan dan waktu orientasi Adalia bipunctata terhadap tanaman dicatat. Penelitian ini merupakan jenis penelitian deskriptif.

Hasil uji preferensi dilakukan dengan 20 kali ulangan menunjukkan bahwa Adalia bipunctata tertarik pada Ipomoea aquatika F. sebanyak 5 % dan waktu orientasi 2 menit 8 detik. Preferensi Adalia bipunctata terhadap Marsilea crenata p. sebanyak 65 % dan waktu orientasi 1 menit 27 detik. Preferensi Adalia bipunctata terhadap Pistia stratiotes L. sebanyak 10 % dan waktu orientasi 2 menit 34 detik. Preferensi Adalia bipunctata terhadap perlakuan kontrol sebanyak 5 % dan waktu orientasi 2 menit 16 detik. Preferensi Adalia bipunctata untuk tidak memilih terhadap spesies tanaman gulma air sebanyak 15 %. Uji preferensi dengan menggunakan kombinasi spesies gulma air diperoleh persentase ketertarikan Adalia bipunctata terhadap Ipomoea aquatica F. dan Marsilea crenata p. sebanyak 10 % dan waktu orientasi 1 menit 18 detik. Preferensi Adalia bipunctata terhadap M. crenata p. dan M. crenata sebanyak 50 % dan waktu orientasi ا menit 26 detik. Preferensi Adalia bipunctata terhadap p. stratiotes dan M. crenata sebanyak 15 % dan waktu orientasi ا menit 10 detik. Preferensi Adalia bipunctata terhadap kontrol sebanyak 15 % dan waktu orientasi 1 menit 25 detik. Preferensi Adalia bipunctata untuk tidak memilih spesies tanaman gulma air sebanyak 15 ٠ /٥.

ABSTRACT

The aim this research is to know the preferencies of Adalia bipunctata towards three species water weeds and their combinations. This research was begun on October till December 2001 in Ecologi and Animal Diversity’s Laboraatories, Biology Departement, Mathematics and Sciences Faculty, Brawijaya University of Malang.

The preferency test were conducted by using Adalia bipunctata that had been cought directly from field, three species water weeds (.Ipomoea aquatica F., Marsilea crenata p., Pistia stratiotes L.) that were tests with 4 - armed olfaktometer. The presentase of Adalia bipunctata and its orientation duration to these plants were be noted. This research is descriptive ones.

The result of preferencies with 20 times repeations showed that Adalia bipunctata was attracted to Ipomoea aquatica F. as 5 % and its orientations duration 2 minutes and 8 second. The preferency of Marsilea crenata p. was 65 % and orientations duration 1 minute and 27 second. The preferency of Pistia stratiotes L. was 10 % and orientations duration 2 minute and 34 second. The preferency of control treatment was 5 % and orientations duration 2 minutes and 16 second. The preferency of Adalia bipunctata to not choose anything (the species of weter weeds) was 15 %. The preferency tests that was done by species combinations of weter weeds had gotten presentase of attractuly of Adalia bipunctata on Ipomoea aquatica F. and Marsilea crenata p. were 10 % and its orientations duration 1 minute and 18 seconds. The preferency of Marsilea crenata p. and Marsilea crenata p. were 50%0 and its orientations duration 1 minute and 26 seconds. The preferency of Pistia stratiotes L. and Marsilea crenata p. were 15 % and its orientations 1 minute and 10 seconds. The preferency of Adalia bipunctata with control treatment was 15 % and its orientations duration 1 minute and 25 seconds. The preferency of Adalia bipunctata to not choose anything (species of weter weeds) was 15 %.