MARSSONINA LEAF BLOTCH ON THE APPLE ORCHARD IN BATU, INDONESIA

AGRIVITA, Journal of Agricultural Science

Ika Rochdjatun Sastrahidayat¹  Hery Nirwanto² 

[1] Department of Plant Protection, Faculty of Agriculture, University of Brawijaya Jl. Veteran Malang 65145 East Java Indonesia$$;Department of Agro-technology, Faculty of Agriculture, UPN “Veteran” Jawa Timur Jl. Raya Rungkut Madya Gunung Anyar Surabaya 60294 East Java Indonesia$$

关键词: apple;    forecast;    leaf blotch disease;    Marssonina coronaria;   

DOI  :  10.17503/agrivita.v38i2.635

学科分类：农业科学（综合）

来源: Universitas Brawijaya * Fakultas Pertanian / Brawijaya University, Faculty of Agriculture

【 摘 要 】

In Indonesia, apple orchards are decreasing because of leaf blotch disease. Marssonina leaf blotch has not been widely known and the problems are associated with the incidence of the epidemic so they need to be studied. Research aimed to investigate the biological aspect of Marssonina leaf blotch, the resistance of apple varieties and the alternative host of Marssonina coronaria, and the interactions between Marssonina leaf blotch and weather factors. The research was conducted in laboratory, greenhouse and on apple orchard respectively. There are three results in this research. First, fruit bodies (apothecia) are not produced by fungus, but only conidia (imperfect form) are. Second, based on bioassay, pathogen survives only on the apple. Finally, there are three formula can be used to predict the leaf blotch disease, such as:1) Y=-37.91+19.98X 6 (population of spores in the air),2) Y = -438.13 + 25.71X 1 (temperature) -3.05X 2 (humidity) + 41.07X 3 (wind speed) -2.07X 4 (sunlight) + 19.25X 5 (rainfall), and 3) Y = -43.86-1.61 22.60 X 5 (rainfall) + X 6 (population of spores).

【 授权许可】

Unknown