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Biology, ecology and control of banana scarring weevil, Philicoptus iliganus (Heller) (Coleoptera: Curculionidae) / by Nicolas M. Dawi

By:

Dawi, Nicolas M [author]

Material type: Text

TextLanguage: English Publication details: Los Baños, Laguna : 1982. Cavite State University- Main Campus,Description: 123 pages : illustrations ; 28 cmContent type:

text

Media type:

unmediated

Carrier type:

volume

Subject(s):

DDC classification:

634.772 D32 1982

Online resources:

Click here to view thesis abstract and table of contents

Abstract: DAWI, NICOLAS MAGHANOY, University of the Philippines at Los Banos, December, 1982, Blology, Ecology and Control of Banana Scarring Weevil Philicoptus Iiganus (Heller) (Coleoptera: Curculionidae), Major Professor: Dr. Bernardo P, Gabriel The life history, habits and other aspects of the biology of P, tliganus were studied under laboratory and field condItions using banana, Musa cavendishii Lamb, and Crassocephalum crepidioides (Benth.) S. Moore, Total developmental period was 166.73 days for those reared in bananas and 149,89 days in G. crepidioides. Longevity was observed to be 167.60 days with no significant difference between males and females. Feeding injury by P. tliganus form ugly scars on banana frults skin rendering it unexportable, Rejected injured fruits can reach 19.7 percent in spite of the usual recommended control measures, ; The scarring weevil is so far found only in Southern Davao and generally in places characterized by high altitude and cool climate, It is highly polyphagous and has been observed to feed on economic plants such as banana, durian, avocado, citrus, coffee, cacao and rambutan. The population of adult P, {liganus obtained from the sampling units did not reflect similar population of the weevil in the fruit bunch, Fluctuation of the adult P. itliganus population was slightly associated with rainfall. Trap plants, C. crepidioides attracted adult weevils which subsequently reduced weevil count in bananas. Lorsban impregnated polyethylene bag (Lorsban IPE) effectively protected the fruits from P. tliganus attack. Control efficiency can be maximized by reducing perforation size and Closing tts bottom at bagging. Decamethrin (Decis 2.5 EC) at 0.00125 percent at concentration was effective and can be used in integrated control Programs, Bufo marinus was confirmed a voracious feeder of P. iliganus and other pests, both In cage and field conditions.

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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	634.772 D32 1982 (Browse shelf(Opens below))		Link to resource	Room use only	T-1531		00002370

Thesis (Ph.D. - - Entomology) University of the Philippines, College, Laguna.

Includes bibliographical references.

DAWI, NICOLAS MAGHANOY, University of the Philippines at Los Banos, December, 1982, Blology, Ecology and Control of Banana Scarring Weevil Philicoptus Iiganus (Heller) (Coleoptera: Curculionidae), Major Professor: Dr. Bernardo P, Gabriel

The life history, habits and other aspects of the biology of P, tliganus were studied under laboratory and field condItions using banana, Musa cavendishii Lamb, and Crassocephalum crepidioides (Benth.) S. Moore, Total developmental period was 166.73 days for those reared in bananas and 149,89 days in G. crepidioides. Longevity was observed to be 167.60 days with no significant difference between males and females.

Feeding injury by P. tliganus form ugly scars on banana frults skin rendering it unexportable, Rejected injured fruits can reach 19.7 percent in spite of the usual recommended control measures, ;

The scarring weevil is so far found only in Southern Davao and generally in places characterized by high altitude and cool climate, It is highly polyphagous and has been observed to feed on economic plants such as banana, durian, avocado, citrus, coffee, cacao and rambutan.

The population of adult P, {liganus obtained from the sampling units did not reflect similar population of the weevil in the fruit bunch,

Fluctuation of the adult P. itliganus population was slightly associated with rainfall.

Trap plants, C. crepidioides attracted adult weevils which subsequently reduced weevil count in bananas.

Lorsban impregnated polyethylene bag (Lorsban IPE) effectively protected the fruits from P. tliganus attack. Control efficiency can be maximized by reducing perforation size and Closing tts bottom at bagging.

Decamethrin (Decis 2.5 EC) at 0.00125 percent at concentration was effective and can be used in integrated control Programs,

Bufo marinus was confirmed a voracious feeder of P. iliganus and other pests, both In cage and field conditions.

Submitted to the University Library 10/06/1993 T-1531