Yellowing in rice plants caused by pathogens and nutrient deficiencies /
Paunlagui, Ester G.
Yellowing in rice plants caused by pathogens and nutrient deficiencies / by Ester G. Paunlagui - Los Baños, Laguna : University of the Philippines, 1977. - 140 pages : illustrations ; 28 cm.
Thesis (M.S. - - Botany-Plant Physiology) University of the Philippines, College, Laguna.
Includes bibliographical references.
PAUNLAGUI, ESTER G., University of the Philippines at Los Banos, March 1977, Yellowing in Rice Plants Caused by Pathogens and Nutrient Deficiencies, Major Professor: Dr. Eduvigis B. Pantastico.
Three cultivars namely, IR-8, C4-53G and BPI-76 were grown in R.S.-17 culture solution under four levels of N, P, K, Ca and Mg to determine growth, soluble nutrients, chlorophyll content and percentage leaf infection of diseased plants.
It was observed that the root growth of phosphorous-deficient plants was highest followed by K, control, N, Mg and calcium deficient plants.
The chlorophyll content of plants was highest in control followed by P-deficient, K, Ca, Mg and N-deficient plants.
The highest NO.~content was obtained in K-deficient while the highest K-content was obtained in Mg and Ca-deficient plants. It was also noted that the highest P and Ca-content was obtained in Ca-deficient plants and P-deficient plants respectively.
Tungro diseased plants had high chlorophyll content than the blast-diseased.
The percentage leaf infection was high in tungro-diseased plants. The three varieties exhibited different responses depending on the levels of nutrients. The higher the concentration of N P and K, the higher the percentage leaf infection. It was also noted that the higher the Mg and Ca-content of the solution, the lower the percentage leaf infection. The 3 varieties showed resistance to blast and susceptibility to tungro virus under greenhouse condition.
Rice--Diseases and pests
633.18 / P28 1977
Yellowing in rice plants caused by pathogens and nutrient deficiencies / by Ester G. Paunlagui - Los Baños, Laguna : University of the Philippines, 1977. - 140 pages : illustrations ; 28 cm.
Thesis (M.S. - - Botany-Plant Physiology) University of the Philippines, College, Laguna.
Includes bibliographical references.
PAUNLAGUI, ESTER G., University of the Philippines at Los Banos, March 1977, Yellowing in Rice Plants Caused by Pathogens and Nutrient Deficiencies, Major Professor: Dr. Eduvigis B. Pantastico.
Three cultivars namely, IR-8, C4-53G and BPI-76 were grown in R.S.-17 culture solution under four levels of N, P, K, Ca and Mg to determine growth, soluble nutrients, chlorophyll content and percentage leaf infection of diseased plants.
It was observed that the root growth of phosphorous-deficient plants was highest followed by K, control, N, Mg and calcium deficient plants.
The chlorophyll content of plants was highest in control followed by P-deficient, K, Ca, Mg and N-deficient plants.
The highest NO.~content was obtained in K-deficient while the highest K-content was obtained in Mg and Ca-deficient plants. It was also noted that the highest P and Ca-content was obtained in Ca-deficient plants and P-deficient plants respectively.
Tungro diseased plants had high chlorophyll content than the blast-diseased.
The percentage leaf infection was high in tungro-diseased plants. The three varieties exhibited different responses depending on the levels of nutrients. The higher the concentration of N P and K, the higher the percentage leaf infection. It was also noted that the higher the Mg and Ca-content of the solution, the lower the percentage leaf infection. The 3 varieties showed resistance to blast and susceptibility to tungro virus under greenhouse condition.
Rice--Diseases and pests
633.18 / P28 1977