scholarly journals Keanekaragaman Artropoda Predator di Agroekosistem Sawah pada Berbagai Galur Padi Politeknik Negeri Lampung

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Lina Budiarti ◽  
Jaenudin Kartahadimadja ◽  
Miranda Ferwita Sari ◽  
Destieka Ahyuni ◽  
Dulbari Dulbari
Keyword(s):  
Pardosa Pseudoannulata ◽  
Farm Program

Artropoda predator dapat dioptimalkan perannya di ekosistem sawah untuk menekan populasi hama. Tujuan dari penelitian ini adalah untuk menganalisis nilai indeks keanekaragaman artropoda predator pada galur padi rakitan Politeknik Negeri Lampung. Penelitian ini telah dilaksanakan pada bulan Agustus-Desember 2020. Penelitian dilaksanakan di lahan Seed Teaching Farm Program Studi Teknologi Perbenihan, Politeknik Negeri Lampung dengan galur padi Pandan Wangi (PW), Ciherang (CH), B1, B2, B3, B4, B7, D2, D3, F3, F4, H1, H4, K, dan L2 dengan 2 varietas unggul pembanding yaitu Ciherang (CH) dan Gilirang (Gil). Pengamatan artropoda dilakukan menggunakan metode jaring dilakukan sebanyak 3 ayunan ganda. Pengambilan sampel serangga dilakukan pada pukul 06.00- 09.00 WIB. Identifikasi menggunakan makroskop binokuler di Laboratorium tanaman pangan II. Data hasil identifikasi serangga kemudian dihitung nilai indeks keanekaragaman spesies Shannon (H’), indeks dominasi spesies Berger-Parker (d) dan indeks kemerataan spesies dari Pielou (E). Hasil pengamatan menunjukkan bahwa artropoda predator yang ditemukan adalah laba-laba predator seperti Oxyopes javanus, Tetragnatha javana, T. virescens, T. maxilosa, Pardosa pseudoannulata, Athypena sp., dan serangga predator seperti Microvelia douglasi, Agriocnemis pygmaea, A. femina, A. pieris, dan Verania lineata, Menochillus sexmachulatus, Hispella atra, dan Paederus fuscipes. Nilai indeks keanekaragaman pada setiap galur padi fluktuatif dan berkisar dari rendah ke sedang.

Characterization of cadmium-responsive transcription factors in wolf spider Pardosa pseudoannulata

Chemosphere ◽  
2021 ◽  
Vol 268 ◽  
pp. 129239
Author(s):  
Juan Wang ◽  
Yuan He ◽  
Xianjin Peng ◽  
Bo lv ◽  
Zhi Wang ◽  
...  
Keyword(s):  
Transcription Factors ◽  
Wolf Spider ◽  
Pardosa Pseudoannulata

scholarly journals Community structure of arboreal and soil-dwelling arthropods in three different rice planting indexes in freshwater swamps of South Sumatra, Indonesia

2020 ◽  
Vol 21 (10) ◽  
Author(s):  
Tili Karenina ◽  
Siti Herlinda ◽  
Chandra Irsan ◽  
Yulia Pujiastuti ◽  
Hasbi Hasbi ◽  
...  
Keyword(s):  
Community Structure ◽  
Species Diversity ◽  
Rice Fields ◽  
Herbivorous Insects ◽  
Arthropod Community ◽  
Pitfall Traps ◽  
Sogatella Furcifera ◽  
Pardosa Pseudoannulata ◽  
Arthropod Species ◽  
Predatory Arthropods

Abstract. Karenina T, Herlinda S,  Irsan C, Pujiastuti Y, Hasbi, Suparman, Lakitan B, Hamidson H, Umayah A. 2020. Community structure of arboreal and soil-dwelling arthropods in three different rice planting indexes in freshwater swamps of South Sumatra, Indonesia. Biodiversitas 21: 4839-4849.  Differences in the index of rice planting can cause differences in the structure of the arthropod community. This study aimed to characterize the community structure of the arboreal and soil-dwelling arthropods in the three different rice planting indexes (PI) in the freshwater swamps of South Sumatra.  Sampling of the arthropods using D-vac and pitfall traps was conducted in the three different rice planting, namely one (PI-100), two (PI-200), and three (PI-300) planting indexes of the rice. The results of the study showed that the dominant predatory arthropod species in the rice fields were Pardosa pseudoannulata, Tetragnatha javana, Tetragnatha virescens, Pheropsophus occipitalis, Paederus fuscipes, and the dominant herbivorous insects were Leptocorisa acuta, Nilavarpata lugens, and Sogatella furcifera. The abundance of arboreal predatory arthropods was the highest in the PI-300 rice and the lowest in the PI-100 rice.    The abundance of soil-dwelling arthropods was the highest in the rice PI-100, and low in the rice PI-200 and PI-300, but the rice PI-100 had the highest abundance of the herbivorous insects. The rice PI-300 was the most ideal habitats to maintain the abundance and the species diversity of the arboreal predatory arthropods. Thus, the rice cultivation throughout the year was profitable in conserving and maintaining the abundance and species diversity of the predatory arthropods.

scholarly journals Melatih Anggota Keltan Rambutan dan Keltan Sakato Kota Padang untuk Mengendalikan Wereng Batang Coklat (WBC) dengan Joint Predator

2019 ◽  
Vol 26 (4.a) ◽  
pp. 222-228
Author(s):  
Sandra Desiska ◽  
My Syahrawati ◽  
Arneti Arneti ◽  
Zurai Resti ◽  
Martinius Martinius ◽  
...  
Keyword(s):  
Nilaparvata Lugens ◽  
Pardosa Pseudoannulata

Serangan wereng batang coklat atau WBC (Nilaparvata lugens) di Sumatra Barat telah tercatat sejak tahun 2012, dan terus mengalami peningkatan sepanjang tahun 2015-2017. Laba-laba serigala (Pardosa pseudoannulata) dan kumbang bemo (Verania lineata) adalah dua jenis predator yang dapat dimanfaatkan untuk menjadi pengendali alami. Beberapa laporan penelitian menyebutkan bahwa laba-laba serigala mampu memangsa WBC sebanyak 5-15 ekor per hari sedangkan kumbang bemo memangsa sebanyak 1-11 ekor. Keberadaan keduanya secara bersamaan (joint predator) dapat menekan populasi WBC mencapai 80%. Pelatihan ini telah dilaksanakan di Keltan Rambutan, Kel. Bungus Barat dan Keltan Sakato Kel. Lambung Bukit Kota Padang. Tujuannya adalah memperlihatkan kepada petani kemampuan memangsa kedua jenis predator selama 1 jam terhadap 10 ekor WBC yang disediakan. Perlakuannya berupa kemampuan memangsa dua jenis predator (1 ekor laba-laba serigala, 1 ekor kumbang bemo, 1:3 joint predator) dalam 3 ulangan. Seluruh hewan uji (laba-laba serigala, kumbang bemo dan WBC) yang digunakan dikoleksi dari lahan persawahan Kecamatan Pauh. Hasil pengujian di Keltan Rambutan menunjukkan bahwa joint predator mampu memangsa 53% WBC yang disediakan, sedangkan di Keltan Sakato mampu memangsa 43% WBC dalam waktu satu jam. Diperlukan upaya dari petani untuk melindungi keberadaan predator tersebut sehingga mereka dapat berperan sebagai predator alami WBC di lapangan.

Transforming farm‐program incentives to preserve tropical forests

2019 ◽  
Vol 34 (3) ◽  
pp. 762-765 ◽  
Author(s):  
Clayton Ogg
Keyword(s):  
Tropical Forests ◽  
Farm Program

Japanese Beef Tariffs: Beef Quality, Farm Programs, and Producer Compensation

2019 ◽  
Vol 17 (2) ◽  
Author(s):  
Andrew Schmitz ◽  
James L. Seale ◽  
Claudine Chegini
Keyword(s):  
Complete Removal ◽  
Tariff Reduction ◽  
Farm Policy ◽  
Welfare Gains ◽  
Price Supports ◽  
Farm Programs ◽  
Partnership Agreement ◽  
The Impact ◽  
Tariff Reductions ◽  
Farm Program

Abstract Beef is a highly protected commodity in Japan and the number of studies on the impact of beef import tariff reduction has increased in light of the controversy over the Trans-Pacific Partnership Agreement (TPPA), in which the gains from freer trade in beef was a major point of discussion. We estimate that an 11% tariff reduction for Japanese imports of both Australian and U.S. beef can generate a net welfare gain to Japan of between US$92 million and US$915 million. These results are not overly sensitive to whether beef is treated as homogeneous or heterogeneous. A more significant determinant of welfare gains is the extent to which farm policy would be decoupled along with tariff reductions. Under a decoupled farm program, producer welfare can remain unchanged while the net gain from freer trade is identical to that of complete removal of price supports with no compensation to producers. Therefore, negotiators for U.S. and Australian beef interests should lobby for both lowered tariffs and a decoupling of domestic farm policy within the importing country. This seems to have been the case as Japan was willing to move toward a more decoupled farm program under the TPPA.

Mul-tiomics analysis of cadmium stress on the ovarian function of the wolf spider Pardosa pseudoannulata

Chemosphere ◽  
2020 ◽  
Vol 248 ◽  
pp. 125904 ◽  
Author(s):  
Juan Wang ◽  
Xianjin Peng ◽  
Huilin Yang ◽  
Bo Lv ◽  
Zhi Wang ◽  
...  
Keyword(s):  
Ovarian Function ◽  
Wolf Spider ◽  
Cadmium Stress ◽  
Pardosa Pseudoannulata
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