The spatial and temporal distribution of reproductive structures [cotton squares of large (68mm diameter), medium (3-6mm diameter), and small bolls
size (5-8mm diameter)] fallen on the soil damaged by boll
weevil between cotton rows were determined in a randomized block design with a factorial arrangement of 4x3, represented by soil surface tracks located at 1-11cm, 12-22cm, 23-33cm, and 34-44cm away from planting row on cotton plants at 70, 85, and 100 days of age.
Significant increase in number of bolls
per plant was recorded with the increase in farm yard manure levels in soil using all types of tillage operations.
Cotton plants emerged during 15 March to 15 April compensated their delayed emergence by achieving maximum height, more number of bolls
, monopodial and sympodial branches as well as early blooming and with higher economic returns for October picking.
Rembert and Jedediah Prescott, of Memphis, in the county of Shelby and State of Tennessee, have invented a new and improved machine for picking or gathering cotton from the bolls
upon the stalks of the plant while they are standing in the field; and we do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making a part of this specification.
Highest SCA for boll
weight, was scored by the progeny CIM-506 x BH-160 (SCA = 0.
Appearance of various phenophases in different cotton cultivars under CLCuD incidence in different sowing environments 50% square formation 50 % flowering Treatment Healthy Diseased Healthy Diseased SP 7007 10th May 46 41 70 64 25th May 44 40 67 63 9th Jun 42 39 65 62 Pancham 541 10th May 50 44 75 68 25th May 45 41 70 65 9th Jun 44 40 68 64 RCH 791 10th May 44 43 69 66 25th May 42 41 67 65 9th Jun 40 38 65 64 50% boll
formation 50% boll
opening Treatment Healthy Diseased Healthy Diseased SP 7007 10th May 97 90 133 128 25th May 94 86 130 125 9th Jun 91 85 128 124 Pancham 541 10th May 102 91 136 130 25th May 98 86 134 129 9th Jun 94 86 131 125 RCH 791 10th May 95 89 131 129 25th May 93 88 129 128 9th Jun 92 86 128 127 Table 2.
Recent studies start unveiling the peculiar characteristics of the populations' adaptive responses of boll
weevil in the tropics.
The variances due to general combining ability (GCA) and specific combining ability (SCA) presented in Table 2 were also significant for bolls
/plant, sympodial branches/ plant, fibre length, plant height and seed cotton yield/ plant and lint% except that GCA was non-significant for boll
weight and seed index whereas, SCA was non-significant for boll
weight, seed index and lint%.
on 1st week of October, that was the least population as compared with other sowing dates (Table-2).
The saliva also carries bacteria which rots the boll
At its annual Ag Issues Forum, Bayer CropScience (BCS) presented Bryan Boll
with the 2014 Young Farmer Sustainability Award.
Key Words: Cotton stainer, Dysdercus koenigii, dusky cotton bug, stink bug, warts, indentations, lesions, internal carpel wall, cotton boll