International Journal of Plant Protection

T. R. Shashidhar ¹, P. R. Dharmatti ², C. C. Angadi ³, B. N. Motagi ⁴, S. J. Prashanth ⁵

Affiliations
1 Department of Horticulture, National Seed Project, Seed Unit, University of Agricultural Sciences, Dharwad Karnataka, IN
2 Department of Horticulture, College of Agriculture, University of Agricultural Sciences, Dharwad Karnataka, IN
3 Karnataka State Department of Agriculture, Dharwad Karnataka, IN
4 Department of Plant Breeding, Seed Unit, University of Agricultural Sciences, Dharwad Karnataka, IN
5 Dr. P. Sadananda Maiya Centre for Food Science and Research,Bengaluru Karnataka, IN

Abstract

Field experiments were conducted on medium black soil to know the effect of different herbicides on growth and yield of garlic. The experiment was conducted with BLG-1 genotype. The experiment was laid out in Randomized Block Design with three replications having fifteen treatments each. The treatments consisted of six herbicides with two concentrations each along with two manual weeding treatments and an unweeded control. The cultural practices were practiced as per the package of practices of University of Agricultural Sciences, Dharwad. Significant differences were observed among the treatments for all the weed parameters at all the stages of observation. Among herbicides, chlorimuron @ 9 and 12 g a.i. ha-1 recorded the least population of weeds (7.39 and 8.20, respectively) and was followed by chlomazone @ 1.0 and 1.5 kg a.i. ha-1 (9.74 and 11.84, respectively). Application of chlorimuron @ 9 and 12 g a.i.ha-1 recorded the lowest fresh weight (14.94 and 15.98 g, respectively) and dry weight (3.38 and 2.49 g, respectively) of weeds and was followed by application of chlomazone @ 1.0 and 1.5 kg a.i. ha-1 (22.35 and 24.30 g of fresh weight and 4.56 and 5.70 g of dry weight, respectively). Yield of garlic bulbs varied significantly wherein application of Oxyfluorfen @ 0.10 g a.i. ha-1 resulted in the production of highest yield ( 37.08 q/ha) and was on par with the application of Pendimethalin @ 1.0 kg a.i. ha-1 (36.22 q/ha) followed by Oxyfluorfen @ 0.20 g a.i. ha-1 (32.91 q/ha) and Pendimethalin @ 1.5 kg a.i. ha-1 (31.31 q/ha). The lowest yield (14.79 q/ha) was recorded in the unweeded control.

Keywords

Weeds, Herbicides, Garlic

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C. C. Angadi ¹, B. N. Motagi ², G. K. Naidu ³, T. R. Shashidhar ⁴

Affiliations
1 Karnataka State Department of Agriculture, Dharwad Karnataka, IN
2 Seed Unit, University of Agricultural Sciences, Dharwad Karnataka, IN
3 Department of Genetics and Plant Breeding, University of Agricultural Sciences, Dharwad Karnataka
4 National Seed Project, Seed Unit, University of Agricultural Sciences, Dharwad Karnataka, IN

Abstract

Large amount of variability was present for pod yield (PY) and resistance attributes like leaf are affected (LAA) and defoliation percentage (DF) in most of the segregating material of groundnut. The association analyses revealed the possibility of breaking undesirable linkages by shuffling genes through three way and back crossing designs. Higher proportion of desirable recombinants for most of the character combinations were observed in these cross categories. Single and double crosses were poor in giving superior recombinants. The non-significant correlation between yield and resistance indicated the possibility of incorporating disease resistance into the adapted cultivar without affecting the yield potential. But even in back and three way crosses frequencies of superior recombinants were considerably low revealing the existence of some amount of undesirable association between characters indicating the need for reshuffling of genes through selective inter-mating.

Keywords

Groundnut, Late Leaf Spot, Resistance, Productivity, Genetic Variability, Association

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