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Journal : Cropsaver : Journal of Plant Protection

Assessment of Sarocladium oryzae Growth Inhibition, the Causal Agent of Rice Sheath Rot Disease, Using Methanol Extract of Binahong Leaves Endah Yulia; Silviya Rahma Dhiya Syafira; Fitri Widiantini; Wawan Kurniawan
CROPSAVER Vol 2, No 1 (2019)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (433.6 KB) | DOI: 10.24198/cs.v2i1.22301

Abstract

Sheath rot disease caused by Sarocladium oryzae is an important disease on rice. The pathogen that infects uppermost leaf sheath enclosing to the young panicles can cause yield losses up to 85%. Though the disease is commonly controlled using synthetic fungicides, the use of natural products that safer to the environment have been enormously explored. The research aimed to test growth inhibition of S. oryzae colony using methanol leaf extract of binahong (Anredera cordifolia). The research was carried out from June until December 2017 at the Laboratory of Biotechnology Plant Protection, Department of Plant Pest and Diseases, Faculty of Agriculture, Universitas Padjadjaran. The method used was Randomized Complete Design consisted of six treatments and four replications. The treatments were five concentrations of binahong leaf extract of 0.125%, 0.25%, 0.5%, 1%, 2% and one control treatment. The result showed that binahong leaf extract did not inhibit the growth of S. oryzae. The highest inhibition percentage of 4.55% at 0.25% concentration was considered to be a low inhibition category. Although the colony growth of S. oryzae was not significantly inhibited, the extract caused hyphal abnormalities. This actually shows the antifungal potency of the binahong leaf extract that needed further examination with more adequate methods.Keywords : Anredera cordifolia, botanical pesticide, rice sheath rot
Potency of Rhodotorula minuta as Plant Growth Promoter on Red Chili Plant Infected by Colletotrichum acutatum Sri Hartati; Linda Tarina; Endah Yulia; Luciana Djaya
CROPSAVER Vol 2, No 2 (2019)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (465.413 KB) | DOI: 10.24198/cropsaver.v2i2.22542

Abstract

Some yeast species were reported to have the ability to promote plant growth. Rhodotorula minuta is a yeast species that has the potency as biocontrol agent. This research was objected to evaluate the potency of R. minuta in promoting the growth of red chilli infected by Colletotrichum acutatum. The experiment was carried out at the Laboratory of Plant Protection Biotechnology and Green House of Ciparanje Experiment Station, Faculty of Agriculture, Universitas Padjadjaran. The experiment was arranged in the randomized completely block design with 9 treatments and 5 replications. The treatments were infestation of R. minuta and inoculation of C. acutatum on 5, 7, and 10 days after replanting, and a positive control with no R. minuta infestation but inoculated with the pathogen and a negative control without R. minuta infestation nor pathogen inoculation. Results of the experiment showed that the effectiveness of the treatments with R. minuta on the increase of the chilli plant height was 3.78-17.90%, leaf number was 4.09-15.19%, and dry weight of the biomass was 0.14-0.58%. This results indicated that treatments with R. minuta were able to promote the growth of chilli plants.
The Effect of Neem, Citronella, Castor Oil, and Their Mixtures against Crocidolomia pavonana F. (Lepidoptera: Crambidae) Leni Maryani; Danar Dono; Endah Yulia
CROPSAVER Vol 2, No 2 (2019)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (573.009 KB) | DOI: 10.24198/cropsaver.v2i2.24063

Abstract

Cabbage-heart caterpillar, Crocidolomia pavonana F. (Lepidoptera: Crambidae), is one of the important pests in Brassicaceae family. Alternative control for cabbage-heart caterpillar that can be used is insecticide made from plant extracts. Neem, cirtonella and jatropha oil are reported to have an insecticidal properties. This study aimed to determine the effect of singgle or combination of neem, citronella, and castor oil to against C. pavonana larvae and to obtain the most effective ratio and concentration of oil combinations. The experimental method used in this research was Randomized Block Design with 41 treatments, i.e. control, single neem, citronella, castor oil and its combination each tested at concentration of 1%; 0,5%; 0,25%; and 0,1%. Each treatment was replicated 3 times. The results of this experiment showed that single oil or combination of neem, citronella and castor oil at consentration of 1% and 0,5% caused 100% larvae mortality, 1:3:2 ratio at 1% concentration was able to reduce food consumption, 3:2:1 ratio at 0,25% concentration was inhibit larvae development and reduce the weight of pupae, and 3:1:2 ratio at 0,5% concentration can reduce the weight of larvae.