ABSTRACT The aim of this research is to select and obtain isolates of rhizosphere fungi from mangosteen plants which have high antagonism activity against Phytophthora palmivora, the cause of stem base rot disease of siamese citrus plant and to identify to the genus level. The study was conducted at the Laboratory of Plant Disease, Faculty of Agriculture, University of Riau, Pekanbaru. The res…
ABSTRACT Soybean (Glycine max L.) is the main food crop after rice and corn. One of the problems faced in soybean cultivation is the attack of armyworms (Spodoptera litura). Yield losses due to pest attacks can reach 80% or even crop failure if not controlled. Papaya leaf (Carica papaya L.) botanical pesticide can be a safe alternative for controlling S. litura. This study aims to obtain an ef…
ABSTRACT The development of upland rice in Indonesia is very important as a solution for food security, especially in areas that do not have adequate access to irrigation water. Upland rice is a rice variety planted on dry land, with major challenges such as limited soil nutrient content and low productivity. Efforts that can be made to cultivate upland rice on dry land are by using organic ma…
ABSTRACT Corn (Zea mays L.) in cultivation has obstacles, namely pest attacks in the field. The main pest that often attacks corn plants is Spodoptera frugiperda J.E. Smith. Soursop plants (Annona squamosa L.) can be used as botanical pesticides to control Spodoptera frugiperda. The study aims to obtain an effective concentration of organic extract of Annona squamosa leaf flour against the mor…
ABSTRACT This study aims to determine the best chlorox sterilization in the cultivation of Dendrobium sp. orchids in vitro. lorox with a concentration of 3% and 5% is the best concentration for the growth of Dendrobium sp. orchid plantlets with a survival rate of 50%.Dendrobium sp orchid subculture should use chlorox with a concentration of 3%, this aims to prevent damage to plant tissue, in a…
ABSTRACT The purpose of study is to know the effect of Trichocompost and NPK fertilizer interaction, the main effect of Trichocompost factor and the main effect of NPK fertilizer factor, as well as to find the best combination of Trichocompost and NPK fertilizer treatments on the growth and production of soybean plants. Studies using factorial trials 4 x 4 by 3 replication, with two factors of…
ABSTRACT This study aims to determine the effect of the best concentration of the combination of BAP with tomato extract on the growth of epicotyl explants of Citrus nobilis Lour. and to support the growth of Citrus nobilis Lour. plantlets from Kampar in vitro. This research was conducted at the Biotechnology Laboratory, Faculty of Agriculture, Riau University, Pekanbaru from Desember 202…
ABSTRACT This study aims to: (1) describe the production input subsystem, (2) analyze the production subsystem, (3) describe post-harvest processing, (4) analyze marketing, and (5) analyze the avocado agribusiness support subsystem in Nagari Giri Maju, West Pasaman Regency. Using a survey method with a qualitative and quantitative approach, 36 purposively selected sample farmers provided prima…
Channa lucius or known as bujuk fish inhabits slow-flowing swamp that is inundated during the rainy season. Bujuk fish is categorized as a carnivore based on its food habits, as it predominantly consumes fish and shrimp. This study aimed to examine the food habits of C. lucius, focusing on food types, the percentage composition of each food item, and the dominant dietary components consumed by…
This study was conducted to identify the types and potential of anoxygenic photosynthetic bacteria (ABF) from Dumai waters, Riau Province as biodegradation agents of solar oil. The study was conducted from January to March 2025. Sea air samples were taken from three different stations in Dumai waters reflecting the port, estuary, and industrial areas, using a purposive sampling method. The proc…
Raising striped catfish (Pangasianodon hypophthalmus) in dark conditions with low salinity (5 ppt) can support growth but may also cause stress and affect blood health. Adding Cosmos caudatus leaves, which contain natural bioactive compounds, in fish feed could offer a natural way to help boost the immune system. This study aimed to understand the hematological response of fish toward the C.cau…
Kampar Kanan river is the habitat of gadih fish. This fish is a native fish in highland waters whose numbers and presence are decreasing in nature. This is caused by changes in environmental conditions in their natural habitat and overfishing. Food is an important factor for fish life because it can help determine the area where fish are distributed and also can be used to monitor the number of…
The Faculty of Fisheries and Marine Sciences, University of Riau reservoir gets water from the butterfly bridge and small ditches. However, in the area around the butterflybridge, manyhumanactivitiesprovide nutrientsto thewaterand asaresult affect the trophic status. To determine the trophic status based on the Trophic Index (TRIX), the study was conducted in February-March 2025. There were 3 s…
The problems in Asian Redtail Catfish farming are low growth and survival rate. Therefore, it is necessary to provide adequate feed to increase the production. One of these important nutrients is glutamine which can be obtained in the form of monosodium glutamate (MSG). This study aimed to evaluate the effectiveness of adding MSG to feed on the growth and survival rate of Asian Redtail Catfish.…
Asian redtail catfish (Hemibagrus nemurus) is a cultivated commodity that is widely cultivated in Indonesia. One of the cultivation systems used is without water replacement during the rearing period. This condition can cause ammonia from leftover feed and feces to increase in the rearing container. This study aimed to evaluate the effects of adding monosodium glutamate (MSG) on the liver perfo…
The use of physiological NaCl solution as a semen diluent was one of the breeding technologies applied in artificial spawning to increase the production value of aquaculture. This study aimed to determine the effect of different concentrations of physiological NaCl solution on the quality of spermatozoa and the hatching rate of koi fish eggs (Cyprinus rubrofuscus). The method used in this resea…
This research aims to identify the supply chain pattern of wolf herring (Chirocentrus dorap) and analyze the performance of supply chain actors in Tanjung Medang Village, North Rupat District, Bengkalis Regency. The method used in this research is a survey method, with primary data obtained through interviews with fishermen and traders in Tanjung Medang Village. The supply chain pattern analysi…
ABSTRACT Liquid waste produced by industry contains various kinds of chemical compounds that are difficult to dissolve such as lead metal from the pulp and paper industry and copper from the electroplating industry, so it is necessary to treat industrial liquid waste. The aim of this study is to obtain the optimal contact time and pH in the bioabsorption of heavy metals Pb(II) and Cu(II) by ca…
ABSTRACT Rice production in Riau Province in 2023 reached 205.97 thousand tons from 51.91 thousand hectares of land, generating a large amount of rice husk waste. When burned completely, rice husks produce ash with pozzolanic properties, which has the potential to be used as a substitute for cement in paving block production. Plastic waste, especially the polypropylene type, is elastic and…
ABSTRACT The people of Pekanbaru have a high interest in education, this can be seen from the high interest in sending their children to public and private schools. However, Pekanbaru has challenges and educational problems in terms of school facilities. School facilities in Pekanbaru at the junior high school level are experiencing a lack of facilities, this can be seen from the decrease in t…