Kersen (Muntingia calabura L.) leaves has a potential as antidibetes herbal tea. The aim of this research was identification chemical compound Kersen (muntingia calabura) leaf  from Jember regency using GCMS methode. This research was conducted at Biosains Laboratory, State Polytechnic of Jember from Mei to December 2020. Gas Chromatograpy–Mass Spectroscopy used column oven temperature of 80-250 °C, pressure at 60 kPa, total flow 6.0 mL/min, column flow 0.94 ml/min. The result shown that major chemichal compound from kersen leaves was Eicosamethyl Cyclodecasiloxane (33.59%), Tetracosamethyl Cyclododecasiloxane (18.23%) dan Octadecamethyl Cyclononasiloxane (17.18%).

Kersen trees (Muntingia calabura L.) are included in the Elaeocarpaceae family and are mostly used as a protective tree. The kersen leaves were an environmental waste (trash) and still lacks implementation in food processing. This study was aimed to determine the chemical characteristics and antioxidant activity of kersen leaves at different altitudes and their potential as an herbal tea. The difference in the height of the place to grow will be used as a factor to be studied so that this study uses a completely randomized design with a one factor pattern (height the place of growings). Kersen leaves were taken from three districts, namely Jember (83 amsl/above mean sea level), Situbondo (5 amsl), and Bondowoso (255 amsl). The results showed that the chemical characteristics of kersen leaves consisting of moisture content, ash content, fat content, and carbohydrate content were not significantly different between regions, while protein content and antioxidant activity levels were significantly different between regions. Keywords: antioxidant activities, kersen leaves

The purpose of this study was to help farmers predict the spread of rice planthopper pests by utilizing Autonomous Drone Mapping technology with Ground Sampling Area. The object under study was rice farming land with an area of ​​64.5 m2 which often experienced disturbances in productivity and quality of rice. Autonomous Drone Mapping Technology with Ground Sampling Area integration. This technology is used to detect the spread of leafhoppers on agricultural land through mapping of the affected land through a map of conditions resulting from shooting and imagery produced by drones flown over agricultural land. This technology can help rice farmers to predict pest attack from an early age by handling and preventive measures so that the level of productivity and quality of rice is not compromised. Prediction analysis can take advantage of remote imaging photos from the use of Autonomous Drone Mapping with Ground Sampling Area by analyzing the spread prediction data with Tren Forecasting Prediction. Based on the analysis of the predictions from the photo of the spread of planthopper pests, the distribution formula is y = 25.396 ln(x) -34.948  with the maximum spread of leafhoppers occurring on the 49th day so that serious handling is needed by farmers.

Propagation of chrysanthemum through tissue culture can produce superior plants in large and uniform quantities and sterile cultures (motherstock) can be obtained so that they can be used as material for further propagation. This research was carried out at Tissue Culture Laboratory, Jember State Polytechnic from April to November 2022. The research design used was a Factorial Completely Randomized Design (CRD). The first factor is the variety which consists of 3 cultivar (Maruta Agrihort, Pinka Pinki and Suciono). The second factor was in vitro culture media consisting of 5 levels (control, MS+BA media 2.0 mg/L and IAA 1.0 mg/L, MS+BA 1.0 mg/L and IAA 1.0 mg/L media, MS+ banana extract media, MS+ coconut water media). So there were 15 treatment combinations with 3 replications for a total of 45 experimental units. Parameters observed included plant height, the day the shoots appear, the day the roots appear, number of leaves and number of roots. The conclusion this research is addition of organic matter to MS media was able to increase the growth of explants compared to MS media with the addition of synthetic PGR and the combination of MS media + coconut water had an average optimal growth yield on all parameters.

Muntingia calabura has the vertiue from the fruits and the leaves. As long time the leaves just become the trash. The place where Muntingia calabura trees grow up may affect the bioactive components of kersen’s leaves produced. This study aims to determine the characteristics of the bioactive components of kersen leaves at different heights, as well as their potential as kersen leaf tea. The total phenol and flavonoid content also analyzed to support the potential of kersen leaf tea as an herbal tea. The research method used a completely randomized design with one factor, namely the difference in the height of the growing places of the Muntingia calabura (kersen) trees taken from Jember, Bondowoso and Situbondo Regency. The bioactive compounds found in Muntingia calabura leaves analysed using FTIR were confirmed as functional groups at wavelengths 3362.48, 2920.96, 2850.30, 1623.51, 1447.40, 1214.17, 1101.28 dan 680.77 cm−1 that was alcohol OH bond, C-H bond, aldehyde group, alkene group, aromatic group, eter, C-O bond, C-H bond and C-N bond. The results showed that the Muntingia calabura leaves from grow up of the height different consist of total phenolic content between 4.066,10 – 5.914,92 mg/100 GAE and total flavonoid content between 22,34 – 31,44 mg/g.