Climate change affects agriculture in some ways including changes in average temperatures, rainfall, and climate extremes with an important impact on pests and diseases. Several types of pests that arise as a result of the climate change and attacked corn plant is Spodoptera frungiperda. This study aims to analyze the relationship between various climate factors with the area affected by Spodoptera frugiperda in the Karo District, North Sumatera. The area used in this study is Karo District, North Sumatera because this is the area with the widest area affected by FAW on maize cropping. The highest area affected on maize in Karo District occurred in April of 1.533 ha. The analysis used in this research is multiple linear regression. Climate factor data are used as independent variables and area affected data as dependent variables. Based on data analysis with multiple linear regression owned by all factors influence on the area affected with a coefficient of determination (R2) of 0.882. Climate factors that have a significant influence on the area affected are rainfall.
Maize is the second most important cereal crop in the world after wheat, contributing substantially to the total cereal grain production in the world economy as a trade, food, feed, and industrial grain crop. The presence of S. frugiperda or Fall Armyworm (FAW) and climate change has affected the corn productivity in North Sumatra. The objective is to determine the distribution and impact of FAW on maize production in North Sumatra. The method used was a survey, observation, and interview farmers and extensions, also secondary data of the FAW attacked from the North Sumatra Food Crops and Horticulture Protection unit (January to August 2019). Sampling was done by simple random sampling with 30 respondents. Analysis data in the form of agronomic advantages and FAW distribution were mapped by overlaying the district administration map with the corn area that was attacked using ArcView GIS. The results showed that the heaviest attack in Karo District was 1,729.9 ha started at 25 days after planting until flowering. The effect of FAW is an increase in production costs by 4.2%, reduction production by 26.6% wherein labour is the highest cost production. Rainfall and wind speed factors have a positive and negative influence on the development of FAW in North Sumatra, early anticipation at the beginning of the plant growth period can reduce the impact on corn production and cost.
Vibrio hctru,yd merupakan ancaman serius pada usaha perbenihan udang windu (Penaeus monodon.) vang menyebabkan kematian massal larva. Cara umum untuk pengendalian penyakit ini biasanya dengan penggunaan bahan kimia maupun antibiotik tetapi kurang efektif karena tingkat keberhasilanya masih sangat rendah.
Senjangnya hasil produk tanaman jagung antara produksi aktual dan potensi hasil khususnya di area dengan lahan jagung potensial—Sumatra Utara—membuat seluruh upaya dan program yang telah digalakkan, termasuk oleh pemerintah, perlu dikaji ulang. Kondisi ini menyiratkan fakta bahwa program-program dari pemerintah belum sepenuhnya diadopsi dengan baik oleh petani. Proses kaji ulang tersebut, salah satunya, tertuang dalam buku ini. Buku di tangan Anda ini merupakan perpanjangan tangan dari pelaksanaan serangkaian program terkait kegiatan pertanian dan pemanfaatan teknologi untuk mendukung keberhasilan dan peningkatan kualitas mutu budi daya tanaman jagung. Buku ini diharapkan mampu menjadi pedoman bagi petani, penyuluh, mahasiswa, praktisi pertanian, maupun pemerintah daerah dalam mengembangkan usaha tani jagung di Sumatra Utara.
Suatu penelitian pemanfaatan bakteri sebagai kontrol biologi dalam mengendalikan populasi Vibrio harveyi pada batas aman telah dilakukan di Laboratorium Penyakit Loka Penelitian Perikanan Pantai Gondol, Bali. Penelitian telah menghasilkan dua isolat bakteri penghambat GSB-95030 dan GSB-95033 vang mempunyai daya hambat dan mampu menekan perkembangan populasi V
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