Abstract. Martanto EA, Tanati AE, Baan S, Tata HR, Murdjoko A. 2020. Effectiveness of biological control of Trichoderma harzianum on soybean leaf rust disease and the production in West Papua Lowland, Indonesia. Biodiversitas 21: 1935-1939. This study aims to evaluate the application of Trichoderma harzianum in leaf rust disease on soybean and its production. The study was conducted for three months starting from May to July 2017, at Residential Unit 11th Sidey Subdistrict, Manokwari District, West Papua Province, Indonesia. This study was designed using Factorial Complete Randomized Design consisting of two treatment factors and repeated three times. There was no treatment of pathogen inoculation in the field. The tested varieties had a different response to plant height. Burangrang, Grobogan, Dena-1, Anjasmoro, and Detam-1 varieties were categorized as moderate resistant varieties. The Trichoderma harzianum application should be applied in the whole crops of soybean to control environmentally the leaf rust disease. Seeds weight per plot for Dena-1 variety was higher compared to other varieties. The combination of Detam-1 varieties with Trichoderma treatment 2 times resulted in increased production.

Evaluation of scab disease resistance and production on sweet potato cultivars. This study was aimed to determine the resistance of local sweet potato cultivars to scab disease in West Papua and the cultivar production. Research was carried out for 6.5 months starting in April 2014. Evaluation of resistance of local sweet potato cultivars and production was designed using a randomized complete block design (RCBD) with three replications. The treatment consists of six local cultivars, namely Mouwebsi, Kuyage-2, Bonsasarai, Inanwatan-4, Wonembai, and Abomourow. There was no inoculation treatment on the field because Papua was endemic region to the scab disease. Data analysis was performed using analysis of variance (ANOVA), followed by DMRT test at level of 95%. Cultivars tested had different responses to the long tendrils of parameters and number of branches. The intensity of the disease in Bonsasarai cultivars was 31.7% (moderately resistant), while in Mouwebsi was 13.75%, Wonembai 8.33%, Kuyage-2 0.42%, Abomourow and Inanwatan-4, 0% categorized as resistant cultivars. The tuber weight of Abomourow (4.55 ton/ha) was higher than that of Mouwebsi (3.80 ton/ha), Wonembai (3.62 ton/ha), Bonsasarai (2.28 ton/ha), and Inanwatan-4 (1.12 ton/ha).Key words: production, resistance, scab, sweet potatoes ABSTRAKEvaluasi ketahanan terhadap penyakit kudis dan produksi beberapa kultivar ubijalar. Penelitian ini bertujuan untuk mengetahui ketahanan kultivar ubijalar lokal terhadap penyakit kudis di Papua Barat dan produksinya. Penelitian dilakukan selama 6,5 bulan dimulai sejak bulan April 2014. Evaluasi ketahanan beberapa kultivar ubijalar lokal dan produksinya dirancang dengan menggunakan rancangan acak kelompok yang perlakuannya diulang tiga kali. Perlakuan terdiri dari enam kultivar ubijalar lokal antara lain Mouwebsi, Kuyage-2, Bonsasarai, Inanwatan-4, Wonembai, dan Abomourow. Tidak ada perlakuan inokulasi di lapangan karena Papua merupakan daerah endemik penyakit kudis. Data dianalisis dengan menggunakan analisis varian, jika perlakuan berbeda nyata, dilanjutkan dengan uji DMRT pada tingkat kepercayaan 95%. Penelitian menunjukkan bahwa setiap kultivar yang dicoba mempunyai tanggapan yang berbeda pada parameter panjang sulur dan jumlah cabang. Panjang sulur dan jumlah cabang meningkat hingga pengamatan ketiga, pada pengamatan keempat ada yang menurun dan ada yang meningkat. Intensitas penyakit kultivar Bonsasarai sebesar 31,7% dikategorikan kultivar agak tahan, sementara intensitas penyakit kultivar Mouwebsi 13,75%, Wonembai 8,33%, Kuyage-2 0,42%, Inanwatan-4 dan Abomourow, 0% dikategorikan kultivar tahan. Bobot umbi kultivar Abomourow 4,55 ton/ha lebih tinggi daripada kultivar Mouwebsi 3,80 ton/ ha, Wonembai 3,62 ton/ha, Bonsasarai 2,28 ton/ha dan Inanwatan-4 1,12 ton/ha. Kata kunci: ketahanan, penyakit kudis, produksi, ubijalar PENDAHULUAN Ubijalar (Ipomoea batatas (L.) Lamb.) merupakan salah satu sumber pangan yang cukup potensial dalam mengatasi ketergantungan terhadap beras (Amir, 1988). Selain itu ubijalar ju...

Organic fertilizers have been considered as environmentally friendly fertilizers in promoting sustainable agriculture, being supported by the abundant natural resources. The study was conducted to determine the effect of type and level of dosage of organic fertilizers on soybean yield. The 4-month study was carried out in West Papua Province, Indonesia, compiled using factorial randomized block design (RBD). The factors were the types of organic fertilizer and two doses of the organic fertilizer. Parameters assessed include number of grains per pod, weight of 100 grains and weight of grains per plot. Pointed out the results of the analysis of variance, the various types of organic fertilizers used (F1, F2, F3 and F4) were significantly different in almost all components of growth and production. However, the type of goat manure (F4) gave the highest yield, while the type of fertilizer that gave the lowest yield was compost (F2). Fertilizer doses were significantly different in almost all yield parameters, namely D1 (5 tons/ha) compared to D0 (without fertilizer). The interaction with the highest yield was goat manure (F4D1), while the interaction that gave the lowest yield was without the use of compost fertilizer (F2D0). Given that high soybean yield can be achieved by balanced fertilization. One way to increase soil fertility in terms of providing nutrients for plants and harmless toward land and plant is by providing organic fertilizers.

Research of soil animals affinity to several type of forest was conducted in Sarmi regency, province of Papua in 2010^th. Method were used in this research is explorative by direct observation and measured in the field. Samples were collected from Production Forest (HP2008, and HP2009), Protections Forest (HLbawah and HLatas), and Conservation Forest (Hcons). Plot of sampling animal using quadrant methods of 1 m x 1 m block squares. Data were analysed by analysis of varian in block design experiment. Advanced analysis using Duncan Multiple Range Test. Result of the research shows that Statistically no signinificanties of affinity of red ants, black ants, cockroaches, spiders, centipedes, and crickets to any of forest site. Totally� abundan of soil animals tend to concentrated on production forest compare to other type of forest. The lowest abundan of soils animal was founded on conservation forest.