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All Journal Pelita Perkebunan Research Journal of Life Science
Indah Anita Sari
Indonesian Coffee and Cocoa Research Institute
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Medicine & Pharmacology

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Effect of Weather Conditions to Vascular Streak Dieback Disease Severity on Some Cocoa Clones with Different Resistant Levels Aini, Febrilia Nur; Aini, Luqman Qurata; Syibli, Muhammad Akhi; Sari, Indah Anita; Susilo, Agung Wahyu; Setyawan, Bayu; Malik, Abdul; Budiman, Aris
Research Journal of Life Science Vol 10, No 2 (2023)
Publisher : Direktorat Riset dan Pengabdian Masyarakat, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rjls.2023.010.02.2

Abstract

Vascular streak dieback is a major disease in cocoa trees that affects at in various stages, and effect in significant yield losses. This study aimed to identify the area under the disease progress curve (AUDPC), infection rate (r), and the influence of weather factors on the development of vascular streak dieback disease caused by Ceratobasidium theobromae in some cocoa clones with different resistant levels. The research used a randomized complete block design consisted six clones as treatment and each treatment consisted of three replications. Disease severity was observed on six different cocoa clones and observations were conducted monthly. The observation of disease severity was observed monthly for 12 months and then used to analyze AUDPC and infection rate. Monthly data on the weather conditions were taken from the climatology station of the Indonesian Coffee and Cocoa Research Center, East Java. The results showed that Sulawesi 01 and ICCRI 09, categorized as resistant clones, showed low AUDPC values, 0.02 and 2.85 respectively. The cocoa clones Sulawesi 02 and MCC 02, categorized as tolerant clones, had higher AUDPC values, 19.87 and 34.27 respectively. The cocoa clones BCL and BL 50 showed the highest AUDPC values, 277.05 and 265.70 respectively. Path analysis on resistant clones indicated that rainfall is the most influential weather factor in increasing the severity of vascular streak dieback, followed by temperature. Higher relative humidity can significantly reduce disease severity, while sunlight and wind speed have smaller effects. In contrast, path analysis on susceptible clones showed that temperature, rainfall, relative humidity, and wind speed all positively influence the severity of vascular streak dieback. At the same time, sunlight has a mitigating effect.
Flush characteristics of several cocoa genotypes different in resistant to vascular streak dieback Sari, Indah Anita; Setyawan, Bayu; Wahyu Susilo, Agung; Fitri Isnaini, Nurhadini; Paputpungan, Samsul; Nur’aini, Febrilia; Solecha Ruseani, Nur
Pelita Perkebunan (a Coffee and Cocoa Research Journal) Vol. 38 No. 2 (2022)
Publisher : Indonesian Coffee and Cocoa Research Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iccri.jur.pelitaperkebunan.v38i2.518

Abstract

Vascular streak dieback (VSD) is one of the main diseases on cocoa that can cause a decrease in production and even death on susceptible plants. The use of selection criteria is very important in the selection process at the seedling phase, young plants and even mature plants in order to support the breeding process of resistant varieties. The aim of the study was to determine the characteristics of flush including flush color, stomata characters and duration of flush color change to green or towards mature leaves as one of the selection indicators for VSD resistance in cocoa. The research was conducted at Kaliwining Experimental Station, Indonesian Coffee and Cocoa Research Institute, Jember, Indonesia. Study of flush color and stomata characters was conducted using a randomized complete block design consisting of four cocoa genotypes with different levels of resistance, classified as resistant to VSD disease (Sulawesi 1, PNT 16) and as susceptible (BCL and BL 50). Each clone was repeated three times and each replication consisted of three plant samples. Flush color duration study was carried out on six cocoa genotypes as treatments, three genotypes with resistant to VSD (PNT 16, Scavina 12, Sulawesi 1) and three genotypes as susceptible to VSD (BL 50, BCL, Criollo 22). Each treatment was repeated three times and each replication consisted of three plant samples. The results showed that the resistant genotypes showed a tendency to have lower chlorophyll and anthocyanin content than the susceptible ones. The stomata character in the resistant genotypes was not different than the susceptible ones, however, the resistant genotype showed that the stomata density at flush tended to be lower. The duration of flush color change to mature leaves (green) in resistant genotypes was significantly faster than susceptible genotypes.
Insect Community Status in Different Field Conditions and Clones in Kaliwining Cocoa Experimental Station, East Java, Indonesia: Sisko Budianto, Wiwin Windriyanti, Sri Wiyatiningsih, Indah Anitasari Budianto, Sisko; Windriyanti, Wiwin; Wiyatiningsih, Sri; Sari, Indah Anita
Pelita Perkebunan (a Coffee and Cocoa Research Journal) Vol. 41 No. 2 (2025)
Publisher : Indonesian Coffee and Cocoa Research Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iccri.jur.pelitaperkebunan.v41i2.629

Abstract

Insect communities are vital to the ecological and economic success of cocoa agroforestry systems, providing essential functions such in pollination, pest control, and nutrient cycling. Their presence and performance are shaped by field structure, clone genetics, habitat complexity, and agricultural practices. This research was conducted at the Experimental Station of the Indonesian Coffee and Cocoa Research Institute in Jember, East Java, which focused on two distinct types of cocoa fields (differences in planting years, plant density, and shade trees) and clones (clone ICCRI03, ICCRI09, and MCC02). The research highlights are the role of field conditions and genetic factors in shaping insect diversity and abundance. The trapping method used a yellow trap, and field conditions included plant height, canopy width, and leaf litter amount, which were measured. The observation revealed 35 insect morphospecies from 30 families and eight non- insect morphospecies, emphasizing the functional diversity of these communities. Field conditions and clones did not have a significant effect on insect abundance and diversity. Field conditions, including plant height, canopy width, and leaf litter amount, did not show a strong correlation with the abundance of insects. Field with more shade trees and vegetation, had a greater abundance of insects, notably predators and decomposers. MCC02 favored pollinator populations, ICCRI03 boosted predators and parasitoids, and ICCRI09 increased overall diversity. However, pollinators and omnivores showed minimal variety across fields and clones. Shannon diversity index values (H’ = 1.59-1.75) suggested moderate biodiversity with uneven species distribution. The study underscores the importance of main- taining habitat complexity, optimizing field management, and strategic clone selection to enhance ecosystem services like pollination and pest control while fostering biodiversity.
Co-Authors Agung Wahyu Susilo Agung Wahyu Susilo Aini, Febrilia Nur Aris Budiman Bayu Setyawan, Bayu Fitri Isnaini, Nurhadini Luqman Qurata Aini Nur’aini, Febrilia Paputpungan, Samsul Sisko Budianto Solecha Ruseani, Nur Sri Wiyatiningsih Syibli, Muhammad Akhi Windriyanti, Wiwin