THE RELATIONSHIP OF ENVIRONMENTAL FACTORS TO RUBBER CORYNESPORA LEAF FALL DISEASES

Damiri, Nurhayati (2009) THE RELATIONSHIP OF ENVIRONMENTAL FACTORS TO RUBBER CORYNESPORA LEAF FALL DISEASES. Jurnal Lingkungan dan Pembangunan, 29 (1). pp. 53-60. ISSN 0216-2717

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      Abstract

      A study on Corynespora leaf fall disease and its relations to enviromental factors had been conducted. This research is aimed at: 1). evaluating clon resistency to Corynespora leaf fall disease in rubber plantation, and 2) study the relation of environmental factors with Corynespora cassiicola infection and the severity of the disease in the rubber nursery. The study was carried out in tree location rubber nursery in Banyuasin Regency. The study was the combination of experimental study and field studies. In this study direct observation was done on nurseries.. Observation was carried out in each appearance of new stalk in the rubber plants. In addition, weather condition and meteoroligal data were observed both directly and indirectly. Parameters observed were connidia distributed in the air and disease severity. The result showed that there was a strong relationship between the amount of spore of Corynespora cassiicola in the air with enviromental factors. The amount of spore was vary from month to month. On average, amount of spore ranged from 1.07 connidia/cm²/day till 4.68 connidia/cm²/day. The variation of spore in the air was believed to be the concequence of variations of weather condition such as number of raindays, rainfall amount and length of radiation. Severity of PGDC in this study tabulatedly is closely related to the amount of spore distributed in the air. In this study it was found that there exist differences in relation pattern in every clon studied namely clons of GT 1, RRIM 600 and PB 260. Relation pattern for clon PB 260 is negligible for the severity is very low (the most resistant clon).

      Item Type: Article
      Uncontrolled Keywords: Corynespora leaf fall diseases; enviromental factor; rubber
      Subjects: S Agriculture > S Agriculture (General)
      Divisions: Faculty of Agriculture > Department of Plant Pests and Diseases
      Depositing User: Dr. Nurhayati Damiri
      Date Deposited: 23 Jun 2012 18:50
      Last Modified: 10 Sep 2012 23:49
      URI: http://eprints.unsri.ac.id/id/eprint/1054

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