Normal view MARC view ISBD view

Leaf spot disease of kaatoan bangkal (Anthocephalus chinensis (Lank.) A. Rich. Ex Walp.) at seeding stage / by Caharodin A. Cali

By:

Cali, Caharodin A [author]

Material type: Text

TextLanguage: English Publication details: Los Baños, Laguna : 1983. Cavite State University- Main Campus,Description: 120 pages : illustrations ; 28 cmContent type:

text

Media type:

unmediated

Carrier type:

volume

Subject(s):

DDC classification:

634.9 C13 1983

Online resources:

Click here to view thesis abstract and table of contents

Abstract: CALI, CAHARODIN A., University of the Philippines at Los Bafios, May, 1983. Leaf Spot Disease of Zaatoan Bangkal (Anthocephaius chinensis (Lamk.) A. Rich. cx Walp.) at Seedling Stage. Major Professor: Dr. Enriquito D. de Guzman The study on leaf spot disease of Kaatoan bangkal (Anthocephalus chinensis (Lamk.) A, Rich. ex Walp.) the seedling stage was conducted in Makiling Experimental and Demonstration Forest (MEDF) nursery, College, Laguna from July 16, 1981 to June 22, 1982. This pathological problem caused severe leaf spots on seedlings of A. chinensis resulting in stunted growth and premature falling of leaves. Around 100 percent of the observed seedlings in the nursery were in different stages of the disease with a calculated infection index of 71.47 percent. The virial symptoms of the disease appeared circular spots, very irregular, yellowish to brownish with apparent gray to black concentric rings similar to contour lines. The fungus produced hyaline and granular mycelium when young, and five-celled olivaceous conidia with two or three setae in the superior hyaline cell. The inferior hyaline cell tapers into an erect pedicel, The causal organism of the disease resembles closely to Pestalotia annulata Berk, & Curt. The fungus grew and sporulated better in all the tested media except in water agar. It grew on a wide pH range of 3-10 with optimum at pH 6. The temperature range for the growth of the fungus was 10°C to 30°C with maximum growth at 25°C. The thermal death point was between 36°C to 40°C, Light is essential for the sporu~ lation of the fungus. Maltose and sucrose favorably supported the growth and sporulation but ammonium nitrate was poorly utilized by the fungus. The fungal pathogen might be mechanically transmitted by the two coleopterous pests of Kaatoan bangkal. Systemic fungicides such as Benlate, Fungitox and Topsin were promising chemicals for the control of the disease.

Average rating: 0.0 (0 votes)

Holdings ( 1 )
Title notes ( 4 )

Holdings
Item type	Current library	Collection	Call number	Materials specified	URL	Status	Notes	Date due	Barcode
Theses / Manuscripts	Ladislao N. Diwa Memorial Library Theses Section	Non-fiction	634.9 C13 1983 (Browse shelf(Opens below))		Link to resource	Room use only	T-1314		00002258

Thesis (M.S. - - Forestry: Forest Biological Sciences) University of the Philippines, College, Laguna.

Includes bibliographical references.

CALI, CAHARODIN A., University of the Philippines at Los Bafios, May, 1983. Leaf Spot Disease of Zaatoan Bangkal (Anthocephaius chinensis (Lamk.) A. Rich. cx Walp.) at Seedling Stage. Major Professor: Dr. Enriquito D. de Guzman

The study on leaf spot disease of Kaatoan bangkal (Anthocephalus chinensis (Lamk.) A, Rich. ex Walp.) the seedling stage was conducted in Makiling Experimental and Demonstration Forest (MEDF) nursery, College, Laguna from July 16, 1981 to June 22, 1982.

This pathological problem caused severe leaf spots on seedlings of A. chinensis resulting in stunted growth and premature falling of leaves. Around 100 percent of the observed seedlings in the nursery were in different stages of the disease with a calculated infection index of 71.47 percent.

The virial symptoms of the disease appeared circular spots, very irregular, yellowish to brownish with apparent gray to black concentric rings similar to contour lines.

The fungus produced hyaline and granular mycelium when young, and five-celled olivaceous conidia with two or three setae in the superior hyaline cell. The inferior hyaline cell tapers into an erect pedicel, The causal organism of the disease resembles closely to Pestalotia annulata Berk, & Curt.

The fungus grew and sporulated better in all the tested media except in water agar. It grew on a wide pH range of 3-10 with optimum at pH 6. The temperature range for the growth of the fungus was 10°C to 30°C with maximum growth at 25°C. The thermal death point was between 36°C to 40°C, Light is essential for the sporu~ lation of the fungus. Maltose and sucrose favorably supported the growth and sporulation but ammonium nitrate was poorly utilized by the fungus.

The fungal pathogen might be mechanically transmitted by the two coleopterous pests of Kaatoan bangkal. Systemic fungicides such as Benlate, Fungitox and Topsin were promising chemicals for the control of the disease.

Submitted to the University Library 01/07/1994 T-1314