Efficacy of goatweed (Ageratum conyzoides Linn.) extract against cabbage head caterpillar (Crocidolomia pavonana F.) in pechay (Brassica rapa L.)
Page views
492Date
2019Author
Thesis Adviser
Defense Panel Chair
Defense Panel Member
Share
Metadata
Show full item record
Abstract
The study was conducted from April 9 to May 9, 2018 at the back field of Lenwood Edge Building. The objective of the study was to assess the efficacy of Ageratum conyzoides Linn. against Crocidolomia pavonana F. in pechay. Specifically, to count the number Crocidolomia pavonana F infesting pechay, rate its damage, determine plant height, the number of leaves, the presence of other insects, the percentage of marketable plant and compute its yield per hectare basis. The experimental treatments were laid out in a randomized complete block design with three replications. The treatments were composed of 15% and 20% whole plant extracts and 15% and 20% leaf extracts of Ageratum conyzoides Linn. Tap water was used as control treatments. The treatments did not affect the number of Crocidolomia pavonana F. infesting the plants. The least insect damage ranging from 0-5% was found in plants treated with 15% and 20% whole plant aqueous extract. Treatments did not significantly affect the plant height and number of leaves until at the 4th week of transplanting. Average plant height in treated plants did not vary, control plants was significantly lower. Plants sprayed with 15% and 20% whole aqueous extracts (WAE) plants had the most leaves of 7.13 and 7.33 respectively. Plants in 15% and 20% WAE had the highest percentage marketable yield of 78.33%. A significantly higher yield of 2557.50 kg/ha, 2667.50 kg/ha was obtained from 15 and 20% WAE. Results showed that 15% and 20% concentrations of A. conyzoides whole aqueous extracts can be used to control C. pavonana in pechay.
Description
Abstract only
Suggested Citation
Develos, V. R. P. (2019). Efficacy of goatweed (Ageratum conyzoides Linn.) extract against cabbage head caterpillar (Crocidolomia pavonana F.) in pechay (Brassica rapa L.) (Unpublished Special paper). Central Philippine University, Jaro, Iloilo City.
Type
Special paperSubject(s)
Department
College of Agriculture, Resources and Environmental SciencesDegree
Bachelor of Science in AgricultureShelf Location
Filipiniana Theses 630.72 D492
Physical Description
viii, 44 leaves
Collections
The following license files are associated with this item:
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Philippines
Related items
Showing items related by title, author, creator and subject.
-
Efficacy of lantana (Lantana camara L.) extracts against the striped flea beetle (Phyllotreta striolata Fabr.) in pechay (Brassica rapa L.)
Labriaga, Philip Andrew B. (2019)This study was conducted at the backfield of the Lenwood Edge Building, Central Philippine University, Jaro, Iloilo City from April 8 to May 8, 2019. This was done to assess the efficacy of lantana aqueous crude extracts ... -
Efficacy of lemongrass (Cymbopogon citratus L.) extract against rice green leafhopper (Nephotettix virescens D.)
Porque, Benjamin S. (2019)The study was conducted on November 23, 2018 to March 15, 2019 at the College of Agriculture, Resources, and Environmental Sciences Research and Development area, Central Philippine University, Jaro, Iloilo City. This study ... -
Efficacy of sugar apple (Annona squamosa Linn.) seed extracts as bio-pesticide against green leafhopper (Nephotettix virescence Distant.)
Esperida, Paulynn A. (2019)The study was conducted at the Central Philippine University College of Agriculture, Resources, and Environmental Sciences research area at the Research and Development Building, Jaro, Iloilo City from November 28, 2018 ...