Micrometeorological Method in Determining Plant Capacity to Absorb Pollutant: Oil Palm Case Study

The vegetation canopy's height and characteristics directly affect the turbulence that controls the exchange of mass and energy between the vegetation and the surrounding atmosphere. Turbulence also controls the momentum transfer towards the mass-carrying plant canopy and the accompanying atmospheric properties so that vegetation can contribute to pollutant deposition. This study aims to estimate the canopy capacity of oil palms to absorb pollutants based on their momentum transfer, the influence of atmospheric stability dynamics, and rainy and dry periods upon absorbed pollutants from PTPN VI in Jambi province for the period of January to December 2015 used micrometeorological observation data. The results showed that the dry deposition capacity value at the stable, neutral, and unstable atmospheric conditions were 2.06 x 10-3 kg/m2, 3.50 x 10-3 kg/m2, and 4.35 x 10-3 kg/m2, respectively.  The stable or unstable conditions affected the momentum transfer through decreasing or increasing turbulence. In stable conditions, the cooling of the atmosphere impacts the turbulence to be restrained. The result also showed that the dry deposition capacity during the dry and rainy periods were 4.5 x 10-3 kg/m2 and 2.9 x 10-3 kg/m2, respectively. Further, atmospheric conditions tended to be unstable during the dry period, while the rainy period tended to be stable. This research showed that the momentum transfer method can estimate gas type pollutants by vegetation

Pengenalan dan Pengendalian Hama Ulat Grayak Frugiperda (Spodoptera frugiperda) di Desa Bonjor, Kabupaten Rembang

Indonesian farmers are now facing a new challenge of a recently emerging pest problem. Early in 2019, farmers in Indonesia were threaten by a massive attack of fall armyworm that caused severe damage to their corn crops. According to students of Thematic Student Study Service (KKN-T) 2021 assigned in Bonjor Village, Rembang Regency, fall armyworms have been making their presence known in that area. Farmers did not recognized fall armyworm before, but they had suspected a pest was the one causing damage to their crops. Introducing the fall armyworm to farmers and their management using natural enemies are the core purposes of this study. The study was carried out by conducting a pre-test on farmers in advance, webinar and training then proceeded with a post-test. The tests were run on 21 farmers in Bonjor Village, Rembang Regency. The majority of farmers in Bonjor have less than 5 years of farming experience, a farm less than 2 ha, and crop production below 5 tons/ha. All farmers claimed that their crops were damaged by UGF attacks. Farmers' knowledge of UGF before the training was only 5% while after the training increased to 43%. Farmers became more familiar with Spodoptera frugiperda pests and other pests. Farmers' understanding of egg groups is still low. Farmers know how to control armyworm frugiperda by utilizing parasitoids and the role of parasitoid roofs.Indonesian farmers are now facing a new challenge of a recently emerging pest problem. Early in 2019, farmers in Indonesia were threaten by a massive attack of fall armyworm that caused severe damage to their corn crops. According to students of Thematic Student Study Service (KKN-T) 2021 assigned in Bonjor Village, Rembang Regency, fall armyworms have been making their presence known in that area. Farmers did not recognized fall armyworm before, but they had suspected a pest was the one causing damage to their crops. Introducing the fall armyworm to farmers and their management using natural enemies are the core purposes of this study. The study was carried out by conducting a pre-test on farmers in advance, webinar and training then proceeded with a post-test. The tests were run on 21 farmers in Bonjor Village, Rembang Regency. The majority of farmers in Bonjor have less than 5 years of farming experience, a farm less than 2 ha, and crop production below 5 tons/ha. All farmers claimed that their crops were damaged by UGF attacks. Farmers' knowledge of UGF before the training was only 5% while after the training increased to 43%. Farmers became more familiar with Spodoptera frugiperda pests and other pests. Farmers' understanding of egg groups is still low. Farmers know how to control armyworm frugiperda by utilizing parasitoids and the role of parasitoid roofs