Efektifitas Tanaman Refugia Border Crop terhadap Serangan Hama Plutella xylostella dan Crocidolomia Binotalis pada Tanaman Kubis Bunga

<p>Pest attacks that become obstacles in cauliflower cultivation are <em>Plutella xylostella</em> and <em>Crocidolomia binotalis</em>, which can cause yield loss and crop failure. Efforts that can be used to reduce excessive use of pesticides are by controlling by the principles of integrated pest control by manipulating habitat using refugia plants grown as border crops. The plants used as refugia were <em>T. subulata</em> and <em>T. erecta</em>. The purpose of the study was to determine the effectiveness of refugia as a border crop against the intensity and attack of <em>P. xylostella</em> and<em> C. binotalis </em>pests. The design used was a Randomized Block Design (RBD) with four treatments and six replications. Observations were made eight times with an interval of one week. Parameters observed were pest population, attack intensity, and parasitization level. The population of <em>P. xylostella</em> and <em>C. binotalis</em> larvae was highest in the P0 (control) treatment. The lowest average <em>P. xylostella</em> and <em>C. binotalis</em> larvae population was in the P3 treatment (<em>T<span style="text-decoration: underline;">. subulata</span> + T. erecta</em>). The highest percentage of damage intensity every week in the control treatment (P0). Treatment P3 (T. <em>subulata + T. erecta</em>) gave a significantly different effect compared to treatment P1 (<em>T. subulata</em>) P2 (<em>T. erecta</em>) and P0 (control). No parasitoid was found that attacks <em>P. xylostella</em>, <em>Eriborusargenteopilosus</em> is a parasitoid of <em>C. binotalis</em> with a parasitation rate of 54%.</p>

EFFICACY OF JATROPHA CURCAS L. SEED EXTRACT ON MORTALITY OF CABBAGE CROP LARVAE (CROCIDOLOMIA BINOTALIS ZELLER: LEPIDOPTERA: PYRALIDAE)

Along with the awareness to obtain quality plant products, the use of plant-based insecticides is increasingly being used. One of the plants used as a plant-based insecticide is Jatropha curcas L. (Jarak pagar) because it contains toxic ingredients to kill cabbage caterpillar pests (Crocidolomia binotalis). This study aims to determine the effectiveness of Jatropha curcas L. on the mortality of Crocidolomia binotalis cabbage caterpillars. The research method used was a Completely Randomized Design (CRD) 7 × 3, consisting of seven treatment concentrations (0,000 ppm, 10,000 ppm, 20,000 ppm, 30,000 ppm, 40,000 ppm, 50,000 ppm, 60,000 ppm), with three replications. Observations were made at 24, 48, 72, 96, 120, 144 hours after application (HAA) of Jatropha. The research activities were carried out in two stages, namely 1) the extraction stage of Jatropha curcas L. seeds and the breeding of the Crocidolomia binotalis test larvae and 2) the testing stage with seven concentration levels of Jatropha curcas L. extract as a plant-based insecticide. ANOVA test showed that the treatments of Jatropha curcas L. extract gave the death effect on larvae [F-count > F-table (116.8 > 2.37)]. Dead larvae change color to black and their body shape will curve. The fastest larval death occurs 24 HAA, with a concentration of 40,000 ppm, which is 50%. At lower concentrations (30,000 ppm), which can kill larvae up to 50%, occurs 120 HAA. With a concentration of 50,000 ppm, 90% of larvae can be killed occurring 96 HAA.

PENGARUH KONSENTRASI MINYAK KEMIRI SUNAN (Reutealis trisperma (Blanco) Airy Shaw) TERHADAP LARVA Crocidolomia binotalis Zell. (Lepidoptera; Pyralidae) HAMA PADA TANAMAN SAWI (Brassica juncea L.)

ABSTRAKKemiri sunan (Reutealis trisperma (Blanco) Airy Shaw) dikenal sebagai tumbuhan yang berperan sebagai pestisida nabati yang belum banyak diketahui keampuhannya, sehingga perlu dilakukan pengujian untuk memperoleh informasi tentang keampuhan dari tumbuhan ini. Pengujian efektivitasnya dilakukan terhadap larva Crocidolomia binotalis Zell. penyebab kerusakan pada tanaman sawi. Percobaan dilaksanakan di Laboratorium Vertebrata, Departemen Hama dan Penyakit Tumbuhan, Fakultas Pertanian, Universitas Padjadjaran, Jatinangor, berlangsung dari Maret sampai Mei 2019. Percobaan menggunakan Rancangan Acak Lengkap (RAL) dengan 5 perlakuan dan 5 ulangan. Perlakuan meliputi minyak kemiri sunan dengan konsentrasi 10%, 5%, 2.5%, 1.25% dan kontrol. Hasil penelitian menunjukkan minyak kemiri sunan berpengaruh terhadap larva Crocidolomia binotalis. Konsentrasi 10% dapat mengakibatkan mortalitas paling tinggi sebesar 100% pada 7 HSA. Selain toksik, minyak kemiri sunan juga dapat memperpanjang lama perkembangan larva, menghambat aktivitas makan (antifeedant), serta menurunkan berat kering larva dibandingkan dengan kontrol. Minyak kemiri sunan berpotensi sebagai alternatif pengendali hama yang ramah lingkungan karena dapat berperan sebagai pestisida nabatiKata kunci: Kemiri sunan, Crocidolomia binotalis, Pestisida nabatiABSTRACTReutealis trisperma (Blanco) Airy Shaw is know as a plant that acts as a vegetable pesticide that is not yet widely known for its efficacy, so testing is needed to obtain information about the efficacy of this plant. Effectiveness testing is carried out on Crocidolomia binotalis Zell. larvae causing damage to oil palm plants. The experiment was carried out in the vertebrate laboratory, the deparment of pest and plant diseases, the faculty of agriculture, the university Padjadjaran, taking place from March-May 2019. The experiment used the randomized design complete with 5 treatments and 5 replication. The treatments included oil Reutealis trisperma (Blanco) Airy Shaw with a concentration 10%, 5%, 2.5%, 1.25% and control. The result hazelnut oil affected the larva Crocidolomia binotalis Zell. 10% concentration can cause the highest mortality of 100% at 7 HAS. In addition to toxic, hazelnut oil prolong the development of larvae, inhibit feeding activity, and reduce the dry weight of larvae compared to controls. Hazelnut oil has potential as an alternative as an a alternative pest control that is environmentally friendly because it can act as a botanical pesticide.Keywords : Reutealis trisperma, Crocidolomia binotalis, Botanical pesticide

Effect of Noni Fruit Extract (Morinda citrifolia L.) And Application Time To Control Crocidolomia binotalis Zell. On Cabbage Plant

Crocidolomia binotalis Zell is an important pest in Brassicaceae vegetable crops. Vegetable insecticide is one potential alternative to controlling the pest. This study aims to determine the application time of noni fruit extract and to determine the effective concentration of noni fruit extract as a vegetable insecticide in controlling C. binotalis larva on cabbage plants in the field. this study used a Completely Randomized Design (RAL) consisting of two treatment factors and four replications. The first factor is the concentration of extract (5 ppm, 10 ppm, 15 ppm and 20 ppm) and the second factor is the time of application of vegetable pesticide before the pest is invested (W1) and after the pest is invested (W2). So there are 32 units of experiments and 4 units of experiments added as control. The results showed, noni fruit extract had no significant effect on mortality of C. binotalis larvae. The highest mortality rate is at 100% K2 (10ppm) concentration at the time of application before the pest is invested (W1). The interaction had significant effect on the wet weight of the plant canopy but had no significant effect on the mortality of the pest, the intensity of the attack, the percentage of pupa formed, and the present percentage of imago.

UJI EFIKASI EKSTRAK DAUN MIMBA, DAUN MENGKUDU dan BABADOTAN TERHADAP MORTALITAS LARVA Crocidolomia binotalis Zell. DI LABORATORIUM

Kubis (Brassica oleracea) merupakan salah satu jenis tanaman sayuran penting yang mempunyai nilai gizi yang tinggi.Serangan organisme pengganggu tanaman (OPT) merupakan salah satu faktor pembatas hasil dan produksi sayuran kubis. Serangga Crocidolomia binotalis Zell. (Lepidoptera:Pyralidae) merupakan hama tanaman kubis karena dapat merusak sehingga menyebabkan gagal panen. Tujuan penelitian ini adalahuntuk mengetahui pengaruh ekstrak daun mimba, daun mengkudu dan babadotan terhadap mortalitas larva C. binotalis. Penelitian ini disusun dalam Rancangan Acak Kelompok (RAK) dengan Perlakuan kontrol (A1), mimba 2,5% (Mi1), mimba 5% (Mi2), mengkudu 2,5% (Me1), mengkudu 5% (Me2), babadotan 2,5% (Ba1) dan babadotan 5% (Ba2). Hasil penelitian menunjukkan bahwa aplikasi insektisida botani (daun mimba, daun mengkudu dan babadotan) mampu menyebabkan kematianlarva C. binotalis pada semua perlakuan yang diuji. Lebih lanjut, semua perlakuan berpengaruh sangat nyata terhadap mortalitas larva C. binotalisZell.

EFIKASI EKSTRAK DAUN MENGKUDU TERHADAP MORTALITAS LARVA Crocidolomia binotalis Zell

Kubis (Brassica oleracea L.) merupakan salah satu jenis tanaman sayuran yang mempunyai nilai gizi yang tinggi dan mengandung beberapa zat yang sangat bermanfaat bagi tubuh. Serangan hama merupakan salah satu kendala dalam budidaya tanaman kubis. Hama penting tanaman kubis adalah Crocidolomia binotalis. Tujuan penelitian ini adalah untuk mengetahui pengaruh ekstrak daun mengkudu terhadap mortalitas larva C. binotalis dan mengetahui tingkat toksisitas ekstrak daun mengkududalam membunuh larva C. binotalis. Penelitian ini disusun dalam Rancangan Acak Kelompok (RAK) dengan perlakuan konsentrasi ekstrak 1%, 2%, 3%, 4% dan 5%. Insektisida nabati yang digunakan adalah ekstrak daun mengkudu. Hasil penelitian menunjukkan bahwa ekstrak daun mengkudu mampu membunuh larva C. binotalis. Ekstrak daun mengkudu konsentrasi 1%, 2%, 3%, 4% dan 5% berpengaruh nyata terhadap mortalitas Crocidolomia binotalis. Toksisitas daun mengkudu yang dinyatakan dengan LC 50 pada 36 jam setelah aplikasi adalah 0,98%, sedangkan toksisitas daun mengkudu yang dinyatakan dalam LT 50 pada konsentrasi 1% adalah 38,89 jam, 2% adalah 24,03 jam, 3% adalah 16,64 jam, 4% adalah 19,11 jam dan 5% adalah 11,84 jam setelah aplikasi.