Sengon has become one of the preferred tree because it has many advantages over other commercial tree species. It was widely cultivated with a monoculture system, like agricultural cultivation. The consequence of monoculture planting system was the unstable microclimate environment, so the ecosystem was susceptible to the pest and disease explosion. As happens at the Ciater plantation site, sengon plants were attacked by pests and diseases. The purpose of research were to study the extent data and intensity of boktor pests and tumor rust disease, boktor pest and bioecological behavior causing tumor rust on sengon as a protective and shade plant. The percentage and intensity of attacks caused by boktor pests and tumor rust disease was relatively high. The lowest percentage of boktor attacks was 40% and the highest was 90%. It could be categorized as serious severity, even dead plants. The percentage and intensity of the attacks indicated that the pests living on sengon could thrive in suitable food sources. Likewise with the percentage and intensity of attacks caused by rust disease has reached 100%, so it could be categorized as the level of damage was high.Keywords: boktor pests, intensity of attack, percentage, sengon, tumor rust disease . ABSTRAK Sengon salah satu pohon yang memiliki banyak keunggulan dibandingkan jenis pohon lainnya dan banyak dibudidayakan secara luas dengan sistem monokultur seperti budidaya pertanian. Konsekuensi sistem tanam monokultur adalah lingkungan mikroklimat yang tidak stabil, sehingga ekosistemnya rentan terhadap hama dan penyakit. Tujuan dari penelitian ini, untuk memperoleh data luas dan intensitas serangan hama boktor dan penyakit karat tumor, perilaku hama boktor dan bioekologi penyebab penyakit karat tumor pada sengon. Metode yang digunakan adalah pengamatan visual setiap tegakan yang terserang oleh hama boktor dan penyakit karat tumor. Persentase dan intensitas serangan akibat hama dan penyakit ini relatif tinggi, untuk hama boktor persentase dan intensitas terendah 40% yang tertinggi 90%, sehingga dapat dikategorikan tingkat keparahan berat, bahkan ada tanaman yang mati. Persentase dan intensitas serangan tersebut menunjukkan bahwa hama yang hidup pada tegakan sengon berkembang dengan sumber makanan yang cocok. Begitu juga dengan persentase dan intensitas serangan akibat penyakit karat tumor sudah mencapai 100%, sehingga dapat dikategorikan tingkat keparahan yang tergolong berat. Kata Kunci : boktor, intensitas serangan, karat tumor, persentase serangan, sengon.
Stem borers at Kaliandra Nursery In PT Usaha Tani Lestari, Sumba Barat NTT. Pest attack is the major problem in the cultivation of energy-producing wood plants, one of which is a stem borer that attacks Kaliandra (Calliandra callothyrsus) plant. The information regarding the level of stem borer attack is needed as a material consideration in the management of the energy-producing timber plant. The purpose of this study is to assess the incidence, calculate the percentage and intensity of attacks and identify the stem borer. This research was conducted at Kaliandra Nursery PT. Sustainable Farming in West Sumba, NTT. The results showed that the identification of stem borer pests of the Xyleborus sp (Scolytidae: Coleoptera) species. 7-month-old seedlings have been attacked with an average stem diameter of 1.21 cm and a stem height of 63.7 cm. The holes produced by the pest Xyleborus sp by 2 mm with the highest number of hole holes 30 points per seed. the distance of the first drill hole from the base is 3.01 cm and the final distance of the drill hole is 56.96 cm. The results of the percentage of attacks reached 90% with the category of severe attacks, the incidence of stem borer pests are also driven by very extreme weather factors/heat.Keywords: Stem Borer, Kaliandra, Percentage, And Intensity of The AttackABSTRAK Serangan hama merupakan masalah utama yang dihadapi dalam budidaya tanaman penghasil kayu energi, salah satunya adalah hama penggerek batang yang banyak menyerang tanaman kaliandra (Calliandra callothyrsus). Informasi mengenai tingkat serangan hama penggerek batang diperlukan sebagai bahan pertimbangan dalam pengelolaan tanaman penghasil kayu energi tersebut. Tujuan penelitian ini adalah mengkaji insidensi, menghitung persentase dan intensitas serangan serta mengidentifikasi hama penggerek batang tersebut. Penelitian ini dilaksanakan di persemaian kaliandra PT. Usaha Tani Lestari Sumba Barat, NTT. Hasil penelitian menunjukkan bahwa identifikasi hama penggerek batang adalah dari jenis Xyleborus sp (Scolytidae : Coleoptera). Bibit umur 7 bulan sudah terserang dengan rata-rata diameter batang 1,21 cm dan tinggi batang 63,7 cm. Lubang gerek yang dihasilkan hama Xyleborus sp sebesar 2 mm dengan jumlah lubang gerek terbanyak 30 titik per bibit. Jarak lubang gerek pertama dari pangkal bawah 3,01 cm dan jarak terakhir lubang gerek sepanjang 56,96 cm. Hasil persentase serangan mencapai 90% dengan kategori serangan yang berat, insidensi hama penggerek batang tersebut juga dipacu oleh faktor cuaca yang sangat ekstrem /panas.Kata Kunci : Hama penggerek batang, kaliandra, persentase, dan intensitas serangan
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