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Uji ketahanan beberapa Varietas Padi Rawa Pasang Surut terhadap Penyakit Tungro di Rumah Kaca Rudi Tomson Hutasoit; Rini Ismayanti
Seminar Nasional Lahan Suboptimal 2020: Prosiding Seminar Nasional Lahan Suboptimal ke-8 “Komoditas Sumber Pangan untuk Meningkatkan K
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Abstract

Hutasoit RT, Ismayanti R.  2020.  Resistance evaluation of several wetland rice varieties to tungro disease in greenhouse condition. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-8 Tahun 2020, Palembang  20 Oktober 2020. pp. xx.  Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).Tungro is one of the important diseases in rice. This disease is caused by multiple infections of the two types of viruses, Rice Tungro Bacilliform Virus (RTBV) and Rice Tungro Spherical virus (RTSV). This study aims to evaluate the resistance of several wetland rice varieties to tungro disease. The varieties tested in this study were Banyuasin, Batanghari, Indragiri, Kapuas, Komojoyo and TN1 as susceptible varieties. The evaluation of these varieties carried out using the test tube method. The disease transmission was carried out on 10 plant seeds of each variety with four replications. The level of resistance were determined based on the severity of tungro symptoms according to the IRRI Standard Evaluation System for Rice. The results showed that the five several wetland rice varieties were categorized as susceptible with a high incidence or percentage of attack 90-100% and a disease index (DI) that varied between varieties. Observations of the incubation period showed that the symptoms of tungro disease appeared fastest in the TN1 varieties, followed by Indragiri, Banyuasin, Batanghari, Kapuas, and Komojoyo.
Biologi dan statistik demografi Thrips parvispinus Karny (Thysanoptera: Thripidae) pada tanaman cabai (Capsicum annuum Linnaeus) Rudi Tomson Hutasoit; Hermanu Triwidodo; Ruly Anwar
Jurnal Entomologi Indonesia Vol 14 No 3 (2017): November
Publisher : Perhimpunan Entomologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (866.037 KB) | DOI: 10.5994/jei.14.3.107

Abstract

Thrips parvispinus Karny (Thysanoptera: Thripidae) is one of the major pests of chili pepper in Indonesia. The pest can be found on all parts of the plants, especially flowers and leaves. Information of the biology and demographic statistic of T. parvispinus are still limited. The objective of this research was to study the biology and demographic statistic of T. parvispinus in Bogor. Fifty individual of 1st instar nymphs were reared on caged chili pepper leaves (d = 4 cm and h = 8 cm). Chilli pepper leaves were replaced everyday and observed daily to determine the development and number of offspring eggs. The collected data were used to obtain information about the biology of the pest such as the stadia of each instar, preoviposition period, life cycle, adult longevity, and fecundity. The data were also used to construct life tables for demographic statistic analysis using of the Jackknife method. There were 5 phases of immature stages of T. parvispinus: eggs, two instars nymph, prepupa, and pupa with their stadia were 4,79, 1,36, 3,54, 1,08, and 1,96 days respectively. The preoviposition period of the insect was 1,11 days, life cycle was 13,68 days, female longevity was 8,55 days, male longevity was 6,00 days, and fecundity was 15,33 eggs per female. The population development of T. parvispinus followed type III of survivorship curve with intrinsic rate of increase was 0,15 individual per days female per days, net reproductive rate was 5,71 individual per female per generation, generation time was 11,49 days and doubling time was 4,57 days.