Seed Health Evaluation in the Process of Free-Virus Citrus Seed Production on Kampar Regency, Riau Province of Indonesia

Abstract

Kampar is one of the largest citrus seed production centers in Indonesia which has a wide distribution range. In anticipating and preventing the spread of dangerous systemic diseases and the presence of vector pests, a survey was conducted to evaluate the health of the seeds and the application of technology to the process of citrus production in Kampar, Riau, Indonesia. The survey was conducted in November 2014 in Sungai Pinang, Tambang, Kampar Regency and at Padang Marpoyan Seed Center, Riau, Indonesia. The sample was selected by random sampling method on scattered seeds in captivity, Foundation Block (FB), Budwood Multiplication Block (BMB) plant in the protected screen house and in farmer land. The results of the survey showed that seed growers that have not used patches from the BMB mother tree are already available on the farmer's land of 1200 stems since 2014 while BMB in BBI is available since 2012. The condition of the parent FB and BMB trees managed by the Agriculture Service in Padang Marpoyan Seed Center is sufficiently good and protected in a screen house. The results of the seed health examination showed that the FB and BMB plants were free from Huanglongbing (HLB) and Citrus Tristeza Virus (CTV) diseases. Whereas, the field of BMB plants on the farmer's land with no screen house protection and Parent Tree showed that the plant's population in the field were infected with CTV by 66.7%. The seed plants spread to 100% small seed grower were infected with CTV. In the medium seed grower cluster, CTV infection occurred as much as 87.5%. In large seed grower, the indexing results showed a positive mark and contained Liberibacter asiaticum pathogens that cause HLB.

Morphology Characterization, Molecular Identification, and Pathogenicity of Fungal Pathogen Causing Kaffir Lime Leaf Blight in Northern Thailand

“…Many diseases caused by fungi, bacteria, and viruses can affect the leaves, stems, roots, and fruits of citrus plants, from seedlings to mature stages [ 45 , 46 , 47 , 48 , 49 ]. In this study, three isolates of L. chinensis were isolated from the lesions of leaf blight on kaffir lime plants collected from northern Thailand.…”