Khan, Ejaz Ahmed (2003) STUDIES ON WEED CONTROL IN SUGARCANE AND ALLOPATHIC EFFECTS OF EUCALYPTUS ON FIELD CROPS. PhD thesis, Gomal University, D.I. Khan.
Different herbicides were evaluated for the control of the weed conyza stricta in sugarcane planted at different geometrical patterns under agro-ecological conditions of D.I Khan during 2000-2001 and 2001-2002. The experiments were conducted in randomized complete block design with split plot arrangement with each treatment replicated thrice. Main plots comprised of various planting geometries whereas sub plots were of herbicidal treatments. Weed parameters recorded were population, height recorded were stalk stool-1 , height, weight with and without top, stem girth and internodes per cane and yodel in tons per hectare. Benefit cost ratio (BCR) was computer for determining economic benefit. Means of various parameters depicted that planting geometries significantly differed for weed and sugarcane. The planting geometry of triple rows at 120 cm produced the highest decrease in the weed population and gave the highest yield of 58.2 t ha-1 as compared to other geometries used in this study. All the herbicide significantly decreased weed population and increased cane yield ha-1 compared to control. The herbicide Dicuran MA60 alone gave the highest cane yield of 59.33 t ha-1 at planting geometry of triple row at 120 cm and 48.22 t ha-1 when average across geometries. The control gave significantly lowest yield of 33.38 t ha-1. The herbicide Dicuran MA60 gave the highest benefit cost ratio (BCR) of 2.19 and the highest gross income of Rs. 51,913/- at planting geometry of triple row at 120cm. The lowest BCR ratio of 1.72 wit the lowest gross income of Rs. 36,164/- was depicted in the control on the same planting geometry. It is suggested that for obtaining economic yield from sugarcane at D.I Khan, it may be planted at triple rows 120 cm apart with application of dicuran MA60 30 days after planting for control of conyza stricta.
|Item Type:||Thesis (PhD)|
|Uncontrolled Keywords:||weed control, sugarcane, eucalyptus, field crops, herbicides, conyza stricta, agro-forestry, allelopathic effect, seed germination, fertilizer management, benefit cost ratio (bcr)|
|Subjects:||Agriculture & Veterinary Sciences(a)|
|Deposited By:||Mr. Muhammad Asif|
|Deposited On:||25 Nov 2006|
|Last Modified:||22 Jan 2009 21:08|
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