000			03785nas|a2200397 a 4500
005			20260817173143.0
008			080102s2007 th uu|m rtt 0| a1eng d
035			_a.b12035774
099		9	_aAIT Thesis no.AS-07-11
100	0		_aProm Visal
245	1	0	_aColor preference of insect pests of Chinese kale (Brassica oleracea var. acephala)
260			_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2007
300			_a68 leaves : _bill.
490	1		_aThesis ; _vno. AS-07-11
502			_aThesis (M.Sc.) - Asian Institute of Technology, 2007
520			_aChinese kale, Brassica oleracea var. acephala, is one of the popular vegetable crops grown in Asia. Potential production of this crop is usually hampered by the presence of insect pests, which is usually managed with the heavy use of pesticides. This study was conducted to explore the color preference of insect pests and natural enemies in order to reduce the level of pest infestation and avoid application of insecticides in Chinese kale production. Nine different colors (viz. black, blue, dark green, light green, orange, purple, red, white and yellow) in terms of cards coated with colorless sticky glue for retaining insects landing on them with a control (without any color cards) were tested for Chinese kale in Randomized Complete Block Design with three replications from December 2006 to January 2007. Insects attracted on cards were identified and counted. Common cutworms, aphids and flea beetles were pests of Chinese kale. Common cutworm larvae were not attractive to any color of traps. Aphids and flea beetle were mostly attracted by yellow, light green, dark green and orange traps. Thrips also captured mostly on yellow and orange sticky traps although they were not pests in Chinese kale. Color preference of leafhopper was- unclear. Rove beetle was attracted to red, black and purple traps. Yellow, light green, dark green and orange were the colors preferred by ladybird beetles and egg parasitic wasps. The color cards did not effect on attraction of lacewings and spiders. Control plots were severely damaged by common cutworm larvae compared to plots having color cards. Yield in plots associated with purple color was the highest (15.47 t/ha) when compared to other color cards and the control. Red and purple colors had the lowest crop damage around 35%, which is of 23% reduction compared to control. These findings indicate that color sensitivity of insects could be effectively used in the integrated pest management programs for the control of insect pests in Chinese kale.
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Agricultural Systems and Engineering, School of Environment, Resources and Development
650		0	_aKale
650		0	_aInsect pests _xControl
700	1		_aRanamukhaarachchi, S.L., _eChairperson
700	1		_aShivakoti, Ganesh P., _eExamination Committee
700	1		_aYakupitiyage, Amararatne, _eExamination Committee
710	2		_aSWEDEN (Sida), _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. AS-07-11
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B10024
907			_a.b12035774 _bmnait _cu
902			_a250422
998			_b0 _c080702 _dm _ea _fu _g0
945			_lmnait
945			_lmnarc
942			_c22
942			_c40
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