Solation and Selection of Potential Endophytic Fungi as Growth Inhibitors of PathogenicFusarium oxysporumColonies on Black Pepper

Ropalia Ropalia, Bonny Poernomo Wahyu Soekarno, ABdul Munif — Thu, 08 Feb 2024 00:00:00 +0000

ellow disease in black pepper (Piper nigrumL.) is caused by plant parasitic nematodes and F. oxysporum. Wounds caused by parasitic nematodes create necrotic tissue in the roots, which facilitates infection by F.oxysporum. The use of endophytic microbes is an environment-friendly method that supports sustainable agriculture. This study aimed to identify potential endophytic isolates as biocontrol agents for F. oxysporum. Endophytes were isolated from the roots of black pepper plants of the Merapin and Lampung Daun Lebar (LDL) varieties at different cultivation sites. Endophytic fungi isolates were screened using the dual culture assayagainst the pathogenic fungus F. oxysporum. In this study, 98 endophytic fungal isolates were obtained, of which 13 isolates were found to have the potency to inhibit the growth of F. oxysporummycelia by 7.78-50% on dual culture screening. The endophytic fungus Gliocladiumsp. CMS8 can inhibit F. oxysporummycelia by up to 50 %, making it a promising candidate for biological control of F. oxysporumin black pepper.

Condition Factor of Mystus nemurus and Correlation of Physic-Chemical Parameters in Barumun Watersheed Labuhanbatu Regency

Niki Windasari, Sri Jayanthi — Thu, 08 Feb 2024 00:00:00 +0000

his study aims to analyze the factors of the condition of fish (Mystus nemurus) and the correlation of physical and chemical parameters of the Barumun watersheed. This study was conducted in March-May 2020. This research uses Purposive Sampling method. The results showed that the value of baung fish condition factors ranged from 1.21 to 1.26. The correlation results showed that the value of lead and pH were positively correlated to the population density male of Mystus nemurus, for the value of temperature, oil & fat, zinc, BOD, copper, water brightness, cadmium, current velocity, and COD were negatively correlated. While in female baung fish the values of BOD, copper, COD and pH are positively correlated to population density, for the values of cadmium, zinc, temperature, lead, current speed, brightness of water, oil & fat are negatively correlated.

Plasma Science League

Solation and Selection of Potential Endophytic Fungi as Growth Inhibitors of PathogenicFusarium oxysporumColonies on Black Pepper

Condition Factor of Mystus nemurus and Correlation of Physic-Chemical Parameters in Barumun Watersheed Labuhanbatu Regency