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All Journal Jurnal Perlindungan Tanaman Indonesia Jurnal Triton Jurnal Agriment
RR. Siti Astuti
Politeknik Pembangunan Pertanian Yogyakarta Magelang
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Social Sciences Veterinary

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Respons Fungsional Burung Pentet (Lanius sp.) terhadap Belalang Kembara (Locusta migratoria manilensis) Siti Astuti; Kasumbogo Untung; F. X. Wagiman
Jurnal Perlindungan Tanaman Indonesia Vol 15, No 2 (2009)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.11771

Abstract

The functional response of predatory bird, Lanius sp. (Passeriformes: Laniidae) on migratory locust [Locusta migratoria manilensis (Orthoptera: Acrididae)] had been studied under restricted condition. The migratory locusts were reared in the green house. Second and fourth nymph instars along with adult stages of the migratory locust were used in this trial. Maximum feeding and functional response of the predatory bird against the migratory locust were determined. Research protocol used follows Holling’s model. Results showed that the maximum feeding of the predatory bird was very high i.e. against 2nd and 4th instars and adult of the locust were 2.75 preys/minute, 0.13 preys/minute, and 0.09 preys/minute; respectively. The relationship between predatory bird and migratory locust fitted with the Holling’ s type 2 functional response. The high feeding rate of the predatory bird revealed that the bird is a promising candidate of biological control agent on migratory locust.
Keefektifan Steinernema spp. terhadap Spodoptera exigua F. X. Wagiman; B. Triman; Rr. Siti Astuti
Jurnal Perlindungan Tanaman Indonesia Vol 9, No 1 (2003)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12280

Abstract

Effectiveness of entomopathogenic nematodes Steinernema spp. against mortality of larvae and pupae of Spodoptera exigua Hubner (Lepidoptera: Noctuidae) was evaluated in the Laboratory of Nematology and Biological Control at the Faculty of Agriculture, Gadjah Mada University. The most virulent isolate of the nematode was selected amongst isolates from Solo, Jombang, and Medan. The effectiveness was determined by analising mortality of the S. exigua that was treated with Steinernema spp. at concentration rates of 0, 50, 100, 200, 400 infective juvenil (IJ) per 1.5 mL aquadest. Inoculation of the nematode was done by filter paper method. Results showed that all isolates were able to infect the third instar of S. exigua. Solo and Jombang isolates caused relative similar in mortalities ca. 98 and 94%, and significantly higher than Medan isolate ca. 86. Hence, the Solo isolate was preferred for efficacy against the insect larvae and pupae. The mortality of S. exigua due to the Steinernema spp. was influenced by the insect instars. The insect mortality-rates of L1, L2, and pupae were 13,3; 6.6 - 13,3; 23,3 - 60% and lower than those of L3, L4, and L5 ca. 41,6 - 75; 46,6 - 60; and 66,6 - 90%, respectively. The nematode concentration-rates did not influenced the mortality of L1, L2, L3, L4, and pupae but it significantly influenced the L5 mortality. The concentration rate of 200 IJ per 1.5 ml aquadest caused the highest mortality.
HUBUNGAN ANTARA RESPONS PETANI DENGAN UPAYA PENGENDALIAN PENYAKIT BLAS (Pyricularia oryzae) Fitria Isnayanti; Siti Astuti; Sukadi
JURNAL TRITON Vol 10 No 1 (2019): JURNAL TRITON
Publisher : Politeknik Pembangunan Pertanian Manokwari

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Abstract

Kajian ini bertujuan untuk mengetahui hubungan antara respons petani dengan upaya pengendalian penyakit blas (Pyricularia oryzae). Kajian dilaksanakan pada bulan Februari – Juli 2019 di Desa Sumberharjo, Kecamatan Prambanan, Kabupaten Sleman. Kajian bersifat deskriptif dengan teknik survei dan pengambilan sampel secara propotional random sampling pada petani yang pernah mengikuti kegiatan SL-PHT. Analisis data menggunakan korelasi Rank Spearman. Hasil kajian menunjukkan bahwa respons petani pada komponen kognitif, afektif, dan konatif semua termasuk kategori tinggi, sedangkan upaya pengendalian termasuk kategori sedang. Hasil uji korelasi Rank Spearman untuk respons kognitif, afektif, dan konatif masing-masing sebesar 0,387, 0,333, dan 0,447 signifikan pada taraf kepercayaan 0,05 dan 0,01. Artinya bahwa petani sangat respons dengan upaya pengendalian penyakit blas tetapi belum maksimal dalam penerapannya. Upaya yang dilakukan agar penerapan blas pengendalian dilakukan secara optimal adalah dengan pemberdayaan petani dalam pencegahan munculnya penyakit salah satunya dengan pemupukan sesuai rekomendasi.
THE EFFECT OF MYOPIC DERIVATIVES OF ESTABLISHED HYBRID RICE SEEDS P 05 AND CEMETI INBRED RICE SEEDS AT VARIOUS PLANTING DISTANCES ON PLANT PHENOTYPE Novita Restiani Novita; RR. Siti Astuti; Suharno Suharno
JURNAL AGRIMENT Vol 7 No 2 (2022): Desember 2022
Publisher : Politeknik Pertanian Negeri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51967/jurnalagriment.v7i2.1363

Abstract

This study aims to determine the effect of ratoon derivatives of hybrid rice seeds (Mapan P-05) and Inbred rice seeds (Cemeti) at various spacings on the diversity of plant phenotypes. This research was carried out in Sumberharjo Prambanan Village, Sleman Yogyakarta. The method used was a factorial complete randomized block design with three replications, the first factor being the established variety P-05 (V1) the cemeti variety (V2), the second factor being the spacing between 20x20 cm, 25x25. cm, 30x30 cm. Parameters observed included plant height, number of productive tillers, panicle length, weight of dry grain harvested/clump, weight of dry grain stored per clump, weight of dry grain harvested/plot, weight of stored dry grain per plot, weight of 1000 grains of grain. Data analysis using ANOVA if it has a significant effect, then it is followed by a significant difference test (DMRT) with a level of 5%. The results showed that the treatment of varietal-derived ratoons had a significant effect on phenotypic diversity. Spacing treatment had no significant effect on phenotype diversity. The combination of varietal treatment and plant spacing had no significant effect on phenotype diversity, varietal treatment with plant spacing factor had no significant interaction with the combination of ratoon ratoon ratoon hybrid seed with a spacing of 30x30 cm.
Test Of Hundreds Established Hybrid Rice Seed Derivatives P-05 And Quantity Of Cemeti Inbrid Rice Derivatives On Product Quality And Quantity Irfanji Fanji; Suharno Suharno; RR. Siti Astuti
JURNAL AGRIMENT Vol 7 No 2 (2022): Desember 2022
Publisher : Politeknik Pertanian Negeri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51967/jurnalagriment.v7i2.1386

Abstract

This study aims to determine the combination of treatment of ratoon derived from F1 rice seeds (Hybrid) of Mapan P-05 and ratoon derived from rice seeds (Inbred) whip with various spacings on the quality and quantity of which yield is the best and to know the interaction factors of ratoon derived from Mapan hybrid rice seeds. P-05 and whip inbred rice were the best in terms of yield quality and quantity. Held from December 2021 to June 2022. And planting of ratoons was carried out on November 14, 2021-March 31, 2022. This research was carried out in Sumberharjo Village, Prambanan District, Sleman Regency, Special Region of Yogyakarta. This study used a Completely Randomized Block Design (RAKL) factorial. The first factor is ratoon rice with two varieties and the second factor is the treatment of various spacings of 20x20;25x25;30x30 cm. Data analysis used ANOVA with a level of 5% and 1%, if it had a significant effect, it was followed by a significant difference test (DMRT) with a level of 5%. The results showed that the hybrid variety treatment always showed higher yield quality and quantity than the whip inbred with spacing treatment. 20x20 cm and followed by a spacing of 25x25 cm and 30x30 cm from the Inbred cemeti variety. The combination of hybrid varieties treatment with 20x20 cm spacing gave the heaviest results on the average weight of dry grain harvested per plot, weight of dry grain storage per plot, weight of 1000 grains of grain, weight of dry grain harvested.
Co-Authors B. Triman Evi Fania Ribka Dua Asa F. X. Wagiman Fitria Isnayanti Fransiscus Xaverius Wagiman Gunawan Yulianto Irfanji Fanji Kasumbogo Untung Miftakhul Arifin Novita Restiani Novita Shelva Aprilia Suharno Suharno Sukadi Totok Sevenek Munanto Totok Sevenek Munanto Yosua Kon Putra Yulianti Astuti