Penelitian tentang Pemanfaatan tanaman bunga marigold dan kacang hias terhadap populasi arthropoda pada tanaman padi sawah untuk mengetahui populasi arthropoda pada tanaman padi sawah dengan memanfaatkan tanaman refugia sebagai tempat singgah musuh alami dan sebagai sumber pakan musuh alami. Tujuan dari penelitian ini dilakukan untuk mengetahui peranan refugia yaitu bunga marigold (Tagetes erecta L.), dan kacang hias (Arachis pintoi) sebagai mikrohabitat musuh alami, dalam upaya Pengelolaan Hama Terpadu (PHT) dalam budidaya padi. Penelitian ini dilaksanakan selama 5 bulan, yaitu mulai bulan November 2017 sampai bulan Maret 2018, bertempat di lahan Desa Antirogo, Kecamatan Sumbersari, Kabupaten Jember. Penelitian ini dilakukan dengan menggunakan tiga petak lahan penelitian berukuran 50 m2. Tiga petak lahan yaitu petak pertama perlakuan refugia  bunga Marigold, petak kedua perlakuan refugia Kacang Hias, dan petak ketiga tanpa refugia. Data hasil penelitian dianalisis secara statistik menggunakan uji t. Hasil penelitian menunjukkan bahwa pemanfaatan tanaman bunga Marigold dan Kacang Hias terhadap populasi arthropoda pada tanamana padi sawah diketahui populasi tertinggi musuh alami terdapat pada petak tanaman padi dengan refugia kacang hias sebanyak 217, dengan refugia Marigold populasi musuh alami sebanyak 156 sedangkan populasi terendah musuh alami terdapat pada petak tanaman padi tanpa refugia sebanyak 140. Penggunaan bunga marigold dan kacang hias berpengaruh terhadap populasi musuh alami.

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Shallow water depth (SWD) and intermittent irrigation are methods design to reduce water use of rice plant and maintain rice yield. The objective of this study was to characterize the rice plant growth behaviour of four different local rice varieties cultivated in continuous flooding (CF) and intermittent with shallow water depth (SWD) irrigation. Rice varieties i.e. Ciherang, IR64, Hitam, and Merah were grown in pot experiment with CF and SWD irrigation. Rice growth parameters such as plant height, number of tillers, SPAD, and steam hardness were observed during a season. Different rice varieties resulted different response to irrigation treatment, where Ciherang and Merah varieties under SWD irrigation were significantly improve number of tillers. However, IR64 and Hitam varieties were different. In addition, plant height and SPAD were not significantly different among treatment. Rice cultivation under SWD irrigation of different local rice varieties in this experiment shows that not significantly different from CF irrigation, indicated that rice varieties can be adapted in areas with limited water availability

The objective of the research concerning the application of Marigold flower and Pintoi peanuts of the natural enemies on Rice plant is to find out the role of refugia. This research was conducted at Antirogo Village, Sumbersari Sub-District, Jember Regency for 5 months. The research started in November 2017 to March 2018. This research was  conducted by using three squares of research area, sized 50 m2. The Treatment were, the first square employed marigold flower as the refugia. The second square used pintoi peanut as the refugia, while the third square was left without any refugia. The data of this research was analyzed statistically by using the t test. The result of this research revealed that through the utilization of marigold flower and pintoi peanut towards the natural enemies of the rice plant, it was founded out that the highest population of the vegetative phase seen on the square where the rice plant is given the pintoi peanut refugia, numbering 92. Meanwhile, the square which utilizes marigold flower showsed the number 50 unit as opposed to the finding which demonstrates that the square of rice plant without refugia showsed the number of natural enemies of 39 unit. The application of marigold flower and pintoi peanuts as the refugia playeds siginificant effect to the population of the natural enemies, respectively.