Impact Of Pestalotiopsis Leaf Fall Disease On Leaf Area Index and Rubber Plant Production
نویسندگان
چکیده
Abstract Currently, Pestalotiopsis leaf fall disease caused by the fungus microspora is commonly found in Indonesian rubber plantations. The defoliation period usually occurs for 1 month as a response to drought during dry season. However, due this disease, gradually with an earlier fall. Leaf can cause decrease number of plant canopy which affects area index and latex production. Therefore, study was carried out examine effect on at Experimental Garden Rubber Research Institute, Sembawa, South Sumatra observing severity RRIC 100 GT clones, measuring index, production year. results showed that there strong correlation between increase index. In addition,
منابع مشابه
Leaf area index measurements
Leaf area index (LAI) is a key structural characteristic of forest ecosystems because of the role of green leaves in controlling many biological and physical processes in plant canopies. Accurate LA1 estimates are required in studies of ecophysiology, atmosphere-ecosystem interactions, and global change. The objective of this paper is to evaluate LA1 values obtained by several research teams us...
متن کاملThe Impact of Crop Rotation and N Fertilization on the Leaf Area Index, Leaf Disease and Yield of Winter Wheat
The research focused on the effects of previous cropping and fertilizers on the LAI, rhythm of the dry matter, leaf disease intensity and amount of yield. Long term field experiments’ results proved that the previous crop fundamentally determines size, rate and dynamics of the dry matter formation in the spring time vegetation period. The LAI index and crop results of winter wheat can be influe...
متن کاملEvolutionarily stable leaf area production in plant populations.
Using an analytical model, it was shown that for a given amount of nitrogen in the canopy of a stand (N(T)), there exists an evolutionarily stable leaf area index (ES-LAI), and therefore an evolutionarily stable average leaf nitrogen content (n(ES)(av);n(ES)(av) =N(T)/ES-LAI), at which no individual plant in the stand can increase its photosynthesis by changing its leaf area. It was also shown ...
متن کاملAssessment of allometric algorithms for estimating leaf biomass, leaf area index and litter fall in different-aged Sitka spruce forests
The relationship between leaf area and diameter at breast height (d.b.h.) or sapwood area (AS) has been used to estimate stand leaf area or biomass of forest canopies. It has been suggested that intra-specifi c variations in the relationship between stand leaf area and d.b.h. or AS can introduce a systematic error in these estimates for younger and older stands unless additional parameters rela...
متن کاملLeaf Area, Leaf Area Index and Light Extinction Coefficient for Taro Culture
Taro, Colocasia esculenta (L.) Schott, is the most important species from the Araceae family. The leaf area (LA) is important for the interception of solar radiation and for the biomass production. The light extinction coefficient (k) is related to the leaf inclination angle, leaf arrangement, regarding the Leaf Area Index (LAI), providing an indication of the plants efficiency on intercepting ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IOP conference series
سال: 2022
ISSN: ['1757-899X', '1757-8981']
DOI: https://doi.org/10.1088/1755-1315/995/1/012030