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Identfication, pathogenicity, suscept range and life cycle of Tylenchorhynchusharum officinarum L.) in the Philippines / by Mulyadi

By:

Mulyadi [author]

Material type: Text

TextLanguage: English Publication details: Los Baños, Laguna, 1984. Cavite State University- Main Campus,Description: 68 pages : illustrations ; 28 cmContent type:

text

Media type:

unmediated

Carrier type:

volume

Subject(s):

DDC classification:

632.2 M91 1984

Online resources:

Click here to view thesis abstract and table of contents

Abstract: MULYADI, University of the Philippines at Los Banos, July, 1984, Identification, Pathogenicity, Suscept Range/and Life Cycle of Tylenchorhynchus Species Associated with Sugarcane (Saccharum officinarum L,) in the Philippines. Major Professor: Dr, Tiburcio T, Reyes. Two species of Tylenchorhynchus, 7. Annulatus . (=I. martini) and ZT, cylindricus, were found associated with sugarcane in the provinces of Laguna, Batsngas, Pampanga and Tarlac, Philippines, J. annulatus was recorded in samples collected in Laguna, Batangas, Pampanga and Tarlac, whereas.T, cylindricus was found only in Tarlac, Z. annulatus was pathogenic to potted sugarcane var, Phil, 56226, Height of sugarcane at 400, 600 and 1000 inoculum level/pot, was significantly lower than the control, by 10.44%, 11.41% and 1, 79%, respectively, 20 weeks after inoculation, Top weight reduction at 400, 600 and 1000 inoculum level/pot were 29, 99%, 33,48% and 39.29%, respectively, as compared with the control. With 400, 600 and 1000 inoculum levels/pot, fresh root weights were reduced by 46,55%, 47.14% and 48,, 90%, respectively, as compared with the control, The average nematode population at 50, 100, 200, 400, 600 and 100)inoculum level/pot, increased by 493, 2248, 2616, 5828, 6039 and 7184 or 9,86, 22448, 13,08, 14,57, 10,06 and 7,18 folds, respectively, I. annulatus reproduced on several plant species, Based on reproduction indices corn and sorghum were considered as excellent hosts, rice as intermediate host, purple nutsedge and Bermuda grass very poor hosts, and soybean, tomato, - cotton, tobacco, peanut, mungbean, itch grass, spiny amaranth and wire grass as nonhosts, The life cycle of T, annulatus on rice seedling in 1% plated sterile water agar was completed in 20-22 days, The egg stage lasted from 4-5 days; the second stage larvae, 3-4 days; the third stage larvae, 5-6 days; the fourth stage larvae, 3-4 days, The developmental stages of T. annulatus required four molts, A female can lay 6-9 eggs in 4-6 days, sometimes two eggs are laid in one day. T. annulatus_ fed only on epidermal cells in the region cell elongation, never invading the roots, hence they are regarded as ectoparasitic nematodes.

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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	632.2 M91 1984 (Browse shelf(Opens below))		Link to resource	Room use only	T-1376		00002284

Thesis (M.S. - - Plant Pathology) University of the Philippines, College, Laguna.

Includes bibliographical references.

MULYADI, University of the Philippines at Los Banos, July, 1984, Identification, Pathogenicity, Suscept Range/and Life Cycle of Tylenchorhynchus Species Associated with Sugarcane (Saccharum officinarum L,) in the Philippines.

Major Professor: Dr, Tiburcio T, Reyes. Two species of Tylenchorhynchus, 7. Annulatus . (=I. martini) and ZT, cylindricus, were found associated with sugarcane in the provinces of Laguna, Batsngas, Pampanga and Tarlac, Philippines, J. annulatus was recorded in samples collected in Laguna, Batangas, Pampanga and Tarlac, whereas.T, cylindricus was found only in Tarlac, Z. annulatus was pathogenic to potted sugarcane var, Phil, 56226, Height of sugarcane at 400, 600 and 1000 inoculum level/pot, was significantly lower than the control, by 10.44%, 11.41% and 1, 79%, respectively, 20 weeks after inoculation, Top weight reduction at 400, 600 and 1000 inoculum level/pot were 29, 99%, 33,48% and 39.29%, respectively, as compared with the control. With 400, 600 and 1000 inoculum levels/pot, fresh root weights were reduced by 46,55%, 47.14% and 48,, 90%, respectively, as compared with the control, The average nematode population at 50, 100, 200, 400, 600 and 100)inoculum level/pot, increased by 493, 2248, 2616, 5828, 6039 and 7184 or 9,86, 22448, 13,08, 14,57, 10,06 and 7,18 folds, respectively, I. annulatus reproduced on several plant species, Based on reproduction indices corn and sorghum were considered as excellent hosts, rice as intermediate host, purple nutsedge and Bermuda grass very poor hosts, and soybean, tomato, - cotton, tobacco, peanut, mungbean, itch grass, spiny amaranth and wire grass as nonhosts,

The life cycle of T, annulatus on rice seedling in 1% plated sterile water agar was completed in 20-22 days, The egg stage lasted from 4-5 days; the second stage larvae, 3-4 days; the third stage larvae, 5-6 days; the fourth stage larvae, 3-4 days, The developmental stages of T. annulatus required four molts, A female can lay 6-9 eggs in 4-6 days, sometimes two eggs are laid in one day. T. annulatus_ fed only on epidermal cells in the region cell elongation, never invading the roots, hence they are regarded as ectoparasitic nematodes.

Submitted to the University Library 01/07/1994 T-1376