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Cropsaver : Journal of Plant Protection
Published by Universitas Padjadjaran
ISSN : -     EISSN : 26215756     DOI : -
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology
The objective of the CROPSAVER Journal is to present articles containing interesting and strategic issues. This journal discusses the discussion of articles with discussion rooms in the fields of plant pests and diseases, technology for pest control, taxonomy, insect physiology, biological insects, toxicology of pesticides, settlement pests that help research, research and research.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 7, No 2 (2024)" : 5 Documents clear
The Ability of Three Species of Yeast in Inhibiting the in vitro Growth of Sclerotium rolfsii Sacc., the cause of damping off on soybean plants (Glycine max L.) Hartati, Sri; Setiani, Cahya; Meliansyah, Rika; Yulia, Endah; Mayanti, Tri
CROPSAVER Vol 7, No 2 (2024)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cropsaver.v7i2.58059

Abstract

Damping off disease caused by Sclerotium rolfsii is one of the important diseases of soybean plants. Biocontrol is considered as more environmentally friendly control method. Yeast is one of the biocontrol agents that can be used to control plant pathogens. This study was objected to test the potential of three species of yeast in inhibiting the growth of S. rolfsii. The experiment was arranged in the completely randomized design. The treatments were dual culture of the pathogen vs the yeasts on PDA and double dishes of S. rolfsii against three yeast isolates i.e. Rhodotorula minuta Dmg 16 BEP, Candida tropicalis Lm 13 BE, Aureobasidium pullulans Dmg 11 DEP, and a control. The results of the dual culture antagonism test showed that the three tested yeasts could inhibit the colony diameter of S. rolfsii by 23.30% – 40.00%, and the sclerotia formation by 46,33% – 98,05%. The results of the double dishes antagonism test showed that the three tested yeast isolates could inhibit the colony diameter of S. rolfsii by 19.60% – 28.20% and could inhibit 100% of sclerotia formation. The treatment of A. pullulans Dmg 11 DEP produced the highest inhibition in both the dual culture and double dishes antagonism tests.
Inventory and Disease Incidence in 38 Accessions of Taro Plants (Colocasia esculenta L.) in Jatinangor, Sumedang Regency, West Java Yulia, Endah; Yunira, Alma; Hidayat, Syarif; Djaya, Luciana; Widiantini, Fitri; Suganda, Tarkus; Karuniawan, Agung
CROPSAVER Vol 7, No 2 (2024)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cropsaver.v7i2.58942

Abstract

Taro is an important agricultural commodity with considerable prospects for international market competition. However, its cultivation faces several challenges, particularly pathogen infections that can lead to substantial yield losses. Conducting a disease inventory in taro plants is essential for effective disease management and serves as a preliminary step in developing resistant taro varieties. This study aimed to document diseases affecting 38 accessions of taro plants. The research was conducted from August to October 2021 at the Ciparanje Jatinangor Experimental Field and the Phytopathology Laboratory within the Department of Plant Pests and Diseases at the Faculty of Agriculture, Universitas Padjadjaran, located in Sumedang Regency. The methodology employed both qualitative and quantitative descriptive approaches. Data collection involved observing the incidence and severity of diseases, as well as identifying the pathogens responsible for the diseases. A total of 292 taro plants were examined during this study. The diseases identified included brown leaf spot (Cladosporium colocasiae), shot hole (Phoma sp.), orange leaf spot (Neojohnstonia colocasiae), white leaf spot (putative Pseudocercospora colocasiae), and leaf blight (Phytophthora colocasiae), along with other symptoms suspected to be caused by root pathogens and viruses.The most prevalent disease observed at the experimental site was brown spot disease, while leaf blight was identified as the most damaging. The incidence of leaf spot and leaf blight reached 100% across nearly all accessions of taro planted at the research site, with the highest severity of disease recorded at 49.65%.
The Ability of Nano Chitosan and Bacillus subtilis (Ehrenberg) Cohn to Suppress the Growth of Alternaria porri (Ellis) Ciferri Al Farisy, Muhammad Restu; Meliansyah, Rika; Susanto, Agus; Hersanti, Hersanti
CROPSAVER Vol 7, No 2 (2024)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cropsaver.v7i2.58185

Abstract

Purple blotch disease, caused by the fungus Alternaria porri (Ellis) Ciferri, poses a significant threat to shallot crops. Environmentally friendly control methods, such as applying nano-sized chitosan and Bacillus subtilis (Ehrenberg) Cohn, offer promising alternatives. This study aims to determine the effective concentrations of nano chitosan and B. subtilis, individually and in combination, to suppress the growth of A. porri in-vitro. The research was conducted from March to June 2024 at the Phytopathology Laboratory and Plant Protection Biotechnology Laboratory, Department of Pests and Plant Diseases, Faculty of Agriculture, Universitas Padjadjaran. A completely randomized design was employed, consisting of nine treatments with three replications each: a control treatment, B. subtilis 107 CFU/ml, 50 ppm nano chitosan, 100 ppm nano chitosan, 200 ppm nano chitosan, B. subtilis 107 CFU/ml + 50 ppm nano chitosan, B. subtilis 107 CFU/ml + 100 ppm nano chitosan, B. subtilis 107 CFU/ml + 200 ppm nano chitosan, and 80% mancozeb. The results indicated that nano chitosan at a concentration of 100 ppm was the most effective single treatment which could suppress the growth of A. porri colonies by 94% and inhibit conidia germination by 95%. Meanwhile, B. subtilis 107 CFU/ml + 100 ppm nano chitosan is the most effective mixed treatment which could suppress the growth of A. porri colonies by 84% and inhibit conidia germination by 90%.
Toxicity Effect of A Mixture Spiked Pepper (Piper aduncum L.) And Castor Bean (Ricinus communis L.) Against Crocidolomia pavonana F. Narendra, Nathanael Dimas; Dono, Danar; Meliansyah, Rika
CROPSAVER Vol 7, No 2 (2024)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cropsaver.v7i2.58910

Abstract

Crocidolomia pavonana is a cabbage crops pest that cause huge losses for farmers. Spiked pepper (Piper aduncum L.) and castor bean (Ricinus communis L.) extracts are known to be used as botanical insecticides because they have toxic compounds. This study aims to evaluate the toxic effects of a mixture of spiked pepper extract and castor oil as plant based insecticides against C. pavonana larvae and assess the index combination. The study consists of toxicity tests using experimental methods with a Randomized Complete Block Design with six treatments and four replications which were analyzed using analysis of probit regression and followed by an analysis of the mixture properties. Toxicity tests were conducted using a single spiked pepper extract, a single castor oil, and a mixture of spiked pepper extract and castor oil. The concentration of single spiked pepper extract used was 0.15%; 0.27%; 0.51%; 0.94%; 1.75%; and control, then the concentration of castor oil was 0.15%; 0.25%; 0.43%; 0.73%; 1.25%; and control, then the concentration of mixture of spiked pepper extract with castor oil was 0.30%; 0.41%; 0.57%; 0.79%; 1.1%; and control with a ratio 1:1. The results of the toxicity test showed that the mixture of spiked pepper extract with castor oil was toxic with LC50 and LC95 of 0.468% and 1.364% respectively at 10 days after treatment. The results of the mixture properties analysis showed that the mixture between spiked pepper and castor oil was additive at LC50 with a Combination Index value of 0.975 and was weakly synergistic at LC95 with a Combination Index value of 0.524.
Filtrate Culture of Trichoderma, Gliocladium, Penicilium and Aspergillus flavus as Inhibitor on Downy Mildew on Maize Ilmi, Nur; Sogandi, Sogandi; Hikmahwati, Hikmahwati
CROPSAVER Vol 7, No 2 (2024)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cropsaver.v7i2.57771

Abstract

Controlling downy mildew caused by Perenosclerospora philipinensis in maize plants is currently dependent on the use of synthetic pesticides; therefore, it is necessary to develop biocontrol agents as a sustainable alternative control. Filtrate cultures of biocontrol agent fungi consist of antibiotics, enzymes, and secondary metabolites that are antimicrobial in nature. We conducted the research from July to August 2024 at the Plant Disease Laboratory of the Department of Protection, Faculty of Agriculture, and the Biochemistry Laboratory of the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Hasanuddin University. This study had four parts: (1) identifying the morphology of biocontrol agent isolates and pathogenic fungi; (2) measuring growth diameter of antagonist fungi;(3) testing filtrate cultures for their ability to inhibit pathogens; and (4) testing filtrate cultures for their ability in vigor of sprouting on corn seeds. Based on morphological identification, the four biocontrol agent isolates are Trichoderma, Gliocladium, Penicillium, and Aspergillus flavus, with the best growth diameter on the Trichoderma, which is 8.5 cm on seven days. The filtrate cultures performed the best in the inhibition test on P. philipinensis, exhibiting spore damage percentages of 70-74%. The vigor test performed best on    Trichoderma and Aspergillus flavus, with growth potential (GP) of 100% and 63%, respectively. Filtrate culture with biological agents has good potential for P. philipinensis spore inhibition and corn seed germination.

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