Electronic Theses and Dissertation

Kutu loncat lamtoro (heteropsylla cubana) merupakan hama utama pada tanaman lamtoro (leucaena leucocephala) yang banyak digunakan sebagai tanaman penaung pada perkebunan kopi robusta. salah satu alternatif pengendalian yang ramah lingkungan adalah pemanfaatan predator curinus coeruleus sebagai agen pengendalian hayati. namun, informasi mengenai keberadaan dan penyebaran predator tersebut pada perkebunan kopi robusta di kabupaten aceh jaya masih sangat terbatas. oleh karena itu, penelitian ini bertujuan untuk mengetahui keberadaan populasi predator curinus coeruleus dan penyebarannya pada perkebunan kopi robusta di kabupaten aceh jaya. penelitian menggunakan metode survei dengan penentuan lokasi secara purposive sampling. pengamatan dilakukan pada sembilan sub-plot berukuran 10 m × 10 m. populasi curinus coeruleus diamati menggunakan metode hand collection, sweeping net, dan perangkap eugenol, sedangkan populasi heteropsylla cubana diamati menggunakan metode hand collection dan sweeping net. parameter yang diamati meliputi penyebaran dan kepadatan populasi curinus coeruleus, populasi heteropsylla cubana, intensitas serangan kutu loncat lamtoro, serta hubungan antara populasi predator curinus coeruleus dengan populasi heteropsylla cubana dan intensitas serangan hama. data dianalisis menggunakan analisis ragam (anova), uji beda nyata terkecil (bnt) pada taraf 5%, dan analisis korelasi. hasil penelitian menunjukkan bahwa curinus coeruleus ditemukan pada seluruh lokasi penelitian. populasi tertinggi ditemukan di desa sabet, diikuti desa pante cermin, dan terendah di desa sango. intensitas serangan heteropsylla cubana, tidak berbeda nyata antar lokasi penelitian. intensitas serangan kutu loncat lamtoro tergolong ringan dengan kisaran 3,76–7,29%. hasil analisis korelasi menunjukkan bahwa hubungan antara populasi curinus coeruleus dengan populasi heteropsylla cubana bersifat sangat lemah dan tidak signifikan, sedangkan hubungan antara populasi curinus coeruleus dengan intensitas serangan heteropsylla cubana bersifat positif dan signifikan. hasil penelitian ini menunjukkan bahwa curinus coeruleus telah tersebar dan beradaptasi pada perkebunan kopi robusta di kecamatan jaya, kabupaten aceh jaya, namun keberadaannya belum mampu menekan populasi heteropsylla cubana secara nyata.

The psyllid (Heteropsylla cubana) is a major pest of lamtoro (Leucaena leucocephala), which is widely used as a shade tree in robusta coffee plantations. One environmentally friendly control alternative is the use of the predator Curinus coeruleus as a biological control agent. However, information on the presence and distribution of this predator in robusta coffee plantations in Aceh Jaya Regency is still very limited. Therefore, this study aimed to determine the presence and distribution of the predator Curinus coeruleus population in robusta coffee plantations in Aceh Jaya Regency. The study used a survey method with purposive sampling. Observations were conducted in nine subplots measuring 10 m × 10 m. The Curinus coeruleus population was observed using hand collection, sweeping nets, and eugenol traps, while the Heteropsylla cubana population was observed using hand collection and sweeping nets. Observed parameters included the distribution and density of Curinus coeruleus and Heteropsylla cubana populations, the intensity of leucaena psyllid infestations, and the relationship between the Curinus coeruleus predator population and the Heteropsylla cubana population and the intensity of pest infestations. Data were analyzed using analysis of variance (ANOVA), the Least Significant Difference (LSD) test at the 5% level, and correlation analysis. The results showed that Curinus coeruleus was found in all study locations. The highest population was found in Sabet Village, followed by Pante Cermin Village, and the lowest in Sango Village. The intensity of Heteropsylla cubana infestations did not differ significantly between study locations. Leucaena psyllid infestations were classified as mild, ranging from 3.76–7.29%. The correlation analysis showed that the relationship between Curinus coeruleus and Heteropsylla cubana populations was very weak and insignificant, while the relationship between Curinus coeruleus and Heteropsylla cubana infestations was positive and significant. The results of this study indicate that Curinus coeruleus has spread and adapted to robusta coffee plantations in Jaya District, Aceh Jaya Regency, but its presence has not been able to significantly suppress the population of Heteropsylla cubana.