Efektivitas Nanoemulsi Minyak Serai Wangi Terhadap Phytophthora palmivora Butl. Patogen Busuk Buah Kakao

Nanoemulsion is a form of nano pesticide that has been widely developed as a pesticide. Several reports state that the main compound contained in Eucalyptus essential oil, namely 1,8 cineol (C10H18O) or Eucalyptol can inhibit the growth of bacteria and fungi. The objective of this study was to assess the effectiveness of two types of Eucalyptus oil formulations with nano scale on the growth of the fungus Phytophthora capsici in vitro. This study was conducted in the plant pathology laboratory, at Indonesian Spices and Medicinal Crops Research Institute (ISMCRI), from January 2021 to June 2022. Chemical analysis of eucalyptus oil formulations with nano scale using Gas Chromatography and Mass Spectroscopy methods. The antifungal assay was carried out by adding a formulation with a specific concentration on Potato Dextrose Agar (PDA) medium and measuring its effect on the growth of P. capsici. The result showed that the particle size of the two eucalyptus oil formulations with nano scale range between 139.87-150.4 nm. The main chemical components of Nano E. urophylla West Java (NE-JB) are alpha-Pinene (13.92%), Eucalyptol (29.17%), p-Cymene (6.03%), and glycerin (20.45%). In contrast, Nano E. grandis North Sumatra (NE-SU) consisted of (1R)-2,6,6-Trimethylbicyclo [3.1.1]hept-2-ene (17.80%), Eucalyptol (10.90%), p-Cymene (6.50%), L-alpha Terpineol (6.69%), and glycerin (39.67%). The NE-SU formulation showed the ability to inhibit the growth of P. capsici better than NE-JB. The percentage inhibition of NE-SU at the 1.5% concentration was 91.47% while NE-JB was only 33.5%.

Section: Effect Of Eucalyptus Oil Nanoemulsion Formulation On the Gro...mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 97%

Effectiveness of Eucalyptus Nano Formulation against Phytophthora capsici the Causal of Foot Rot Disease on Black Pepper

Noveriza¹,

Manohara²

2023

“…Using citronella essential oil to control plant pathogenic fungi is proven to suppress fungal growth, but several weaknesses exist. Citronella essential oil has a volatile and unstable weakness, so its effectiveness decreases [9].…”

Section: Introductionmentioning

confidence: 99%

Fungicidal activity nanoemulsions of citronella oils (Cymbopogon nardus L.) against rice seed-borne pathogenic fungi

Harahap

MARTINIUS

Darnetty

2023

Rice seed-borne pathogenic fungi are one of the causes of decreased rice productivity. Nanoemulsion of citronella oil is an alternative control for seed-borne pathogenic fungi carried by rice seeds and is effective and environmentally friendly. The research aimed to determine the effective concentration of nanoemulsions of citronella oil in controlling rice seed-borne pathogenic fungi. The study was conducted in two stages: 1. In the laboratory using a completely randomized design (CRD) with seven treatments and four replications. 2. Greenhouse uses the same design and treatment in stage one. The treatments used were control (soaking using sterile distilled water), nanoemulsion of citronella oil concentrations of 0.40%, 0.45%, 0.50%, 0.55%, 0.60%, and synthetic fungicide with propineb active site (70 WP) at a 2 g/l. The data obtained were analyzed using variance with the advanced test of Least Significance Different (LSD) at the 5% level. The parameters observed were the percentage of rice seeds that were attacked by fungi, identification of seed-borne pathogenic fungi, percentage of rice seeds that were attacked by each fungus, percentage of seedlings that appeared in the field, percentage of seedlings attacked by fungi, percentage of dead seedlings, seedling height, fresh and dry weight of seedlings. The result showed that nanoemulsion with a concentration of 0.50% was the most effective in controlling rice seed-borne pathogenic fungi, with the effectiveness of seeds being attacked suppressed by fungus, seedlings appearing in the field, seedlings being attacked by fungus, dead seedlings, seedling height, fresh and dry weight seeds were 75.00%, 60.00%, 100.00%, 100.00%, 60.83%, 141.55%, 366,67% respectively.

“…Endophytic bacteria are used as biological agents because they can control pathogens, increase plant growth, and induce plant resistance [13][14][15]. The use of endophytic bacteria to control nematodes in coffee plants is reported by [16], results showed that endophytic bacteria can suppress P. coffeae and increase plant growth. Furthermore, [2] reported that endophytic bacteria can suppress the number of gall and the nematode population of Meloidogyne spp.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of organic fertilizer, biofertilizer and endophytic bacteria to control nematodes in robusta coffee

Harni

Saefudin

Sasmita

et al. 2023

Coffee is a plantation crop that has high economic value. One of the obstacles in the cultivation of coffee plants is the attack of plant parasitic nematodes, including Pratylenchus coffeae, Radopholus similis, and Meloidogyne spp. The reported nematode control technologies are the implementation of organic fertilizers, botanical pesticides, and biological agents. This study aimed to determine the effect of organic fertilizer, biofertilizer, and endophytic bacteria to control nematodes on Robusta coffee plants. The research conducted on a farmers’ coffee plantation infested by parasitic nematodes in Sidomulyo village, Lampung, Indonesia. The study used a randomized block design with 6 treatments: organic fertilizer, organic fertilizer + biofertilizer, organic fertilizer + endophytic bacteria, biofertilizer + endophytic bacteria, organic fertilizer + biofertilizer + endophytic bacteria, and control (farmer’s technology). Biofertilizers were applied together with organic fertilizers at the beginning of the rainy season, 25 g/tree and 3 kg/tree, respectively. Endophytic bacteria were applied 100 ml/tree a month after organic and biofertilizer. The observations were performed on the nematode population, growth, and production of robusta coffee. The results showed the application of organic fertilizers, biofertilizers, and endophytic bacteria could suppress the nematode population in Robusta coffee plants of 50.56-70.71%. The application of organic fertilizers, biofertilizers, and endophytic bacteria also increases the growth and productivity of Robusta coffee plants.