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Articles by G.S. Solangi
Total Records ( 4 ) for G.S. Solangi
  F.C. Oad , M.H. Siddiqui , U.A. Buriro and G.S. Solangi
  The field trial was conducted to assess weed management practices in cotton at Students Farm, Sindh Agriculture University, Tandojam, Pakistan. The herbicides applied were: T1 = Dual Gold 960 EC @ 2.0 L ha-1 pre-emergence, T2 = Dual Gold 960 EC @ 2.5 L ha-1 pre-emergence, T3 = Stomp 330 EC @ 2.5. L ha-1 pre-emergence, T4 = Stomp 330 EC @ 3.75 L ha-1 pre-emergence, T4 = Hand weeding and T5 = Control. Weed flora after 71 days of sowing competing with experimental cotton were: Cyperus rotundus (40.03%), Portulaca oleraceae (17.77%), Cynodon dactylon (13.70%), Echinochlor columum (10.00%), Convolvulus arvensis (9.25%), Digeria arvensis (3.70%), Euphorbia hirta (1.85%), Cressia cretica (1.85%) and Chorchorus depressus (1.85%). Highest weed density (54.25 m2) and weed intensity (25.00 m2) were recorded in weedy (control) fields, while highest weed control percentage (74.07%) was observed in hand weeded plots. Among herbicide treatments, Dual Gold 960 EC @ 2.5 L ha-1 pre-emergence produced maximum weed control (56.66 %), followed by Dual Gold 960 EC @ 2.0 L ha-1 pre-emergence (36.66 %). Stomp 330 EC @ 3.75 L ha-1 pre-emergence resulted 33.33% weed control, while Stomp 330 EC @ 2.5 L ha-1 pre-emergence recorded 29.62% weed control. Mean cotton plant height (103.65 cm), monopodial branches (3.06) and sympodial branches (39.00) plant-1, productive bolls (32.3) plant-1 and seed cotton yield (3942.50 kg ha-1) were maximum in hand weeded plots. Among, herbicidal treatments, Dual Gold 960 EC @ 2.5 L ha-1 pre-emergence produced best results with 93.05 cm cotton plant height, 2.66 monopodial branches, 29.0 sympodial branches and 23.20 productive bolls plant-1 and seed cotton yield of 2992.50 kg ha-1. It was observed that weed control practices in cotton were more effective in controlling weeds and producing higher seed cotton yield, when integrated efforts which include manual weeding as well as use of herbicides are employed simultaneously. However, Dual Gold 960 EC @ 2.5 L ha-1 pre-emergence may be preferred for chemical control of weeds in cotton.
  G.M. Mahar , F.C. Oad , U.A. Buriro and G.S. Solangi
  An experiment was laid out at Students Farm, Sindh Agriculture University, Tandojam, Pakistan. Cotton variety Shahbaz-95 was treated with weed control treatments (Stomp-330 EC at 3 L ha-1, Stomp-330 EC at 4 L ha-1, Stomp-330 EC at 5 L ha-1, Fusilade at 3 L ha-1, Fusilade at 4 L ha-1, hand weeding and untreated check). Among the twelve weed species observed in the cotton field Trianthema portulacastrum (29.56%), Cyperus rotundus (17.24%), Portulaea oleracea (14.78%) and Digerea arvensis (10.47%) were the dominant weeds, while other weed species were in trace. Weed population recorded before herbicide application ranged between 63.71 - 65.13 m-2. Hand weeding and application of Stomp-330 EC at 5 L ha-1 reduced weed density significantly (92.40 and 91.59%) over other weed control measures, which in turn resulted taller plants (158.50 and 155.60 cm), exhibited more fruiting branches (14.09 and 13.50 plant-1), higher productive bolls (82.39 and 80.78 plant-1) and maximum seed cotton yield (2121.75 and 1957.50 kg ha-1).
  G.S. Solangi , G.M. Mahar and F.C. Oad
  The study on appearance and abundance of different insect predators against sucking insect pest of cotton in field conditions was conducted in the farmer`s field, Kot Banglow District Khairpur, Pakistan. The population of sucking insect pests and insect predators were observed 20 days after sowing of the cotton crop. The insects were counted with the help of the magnifier lens. The analysis of data indicates that there was highly significant difference in days of observations, population of sucking insect pests and predator population. The mean maximum population of whitefly (31.98 plant-1) was observed in first week of the September at relative mean temperature 32.60°C, however the maximum population of thrips (29.96 plant-1) and jassids (3.93 plant-1) was found in last week of the August at relative mean temperature 32.88°C. The maximum overall means of whitefly in various observation days were observed (15.90 plant-1), followed by thrips (14.30 plant-1) and jassid (2.08 plant-1). The predator population of Green Lacewing, Chrysoperla carnea, Big eyed bug, Geocoris punctipes linearly increased but the population of Pirate bug, Orius insidiosus decreased in the last week of August at relative mean temperature 32.88°C. The maximum overall means of Green Lacewing in various observation days was 2.07 plant-1), followed by Pirate bug (1.84 plant-1) and Big eyed bug (1.28 plant-1). The results indicated that the sucking insect pests were below the economic injury level at all phenological stages of the cotton plant due to the regular increase in predator population. The predators were active throughout the cotton season due to non-application of pesticides in and around the experimental area. The correlation coefficient (R = 0.563) showed a positive relationship between insect predators and sucking insect pest population. The increase in sucking insect population also exhibited an increase in predator population in observed days and trend line shows increase in insect predator population with sucking insect pest population during the growth stages of cotton crop.
  I.A. Khuhro , G.S. Solangi , S.N. Khuhro , R.D. Khuhro and F.C. Oad
  The experiment on effect of different diets on various biological parameters conducted at Karachi Sindh, Pakistan revealed that the German cockroach, B. germanica was reared at constant temperature of 31±2°C under laboratory conditions with supply of three diets and water. The different diets i.e., poultry feed, sugar+wheat flour and rusk affected different biological parameters of B. germanica such as, mean incubation period, hatching percent of eggs, nymphal developmental period and adult longevity. B. germanica fed on poultry diet showed maximum hatching (94.65%) followed by sugar+wheat flour (88.54%) and rusk diet (87.04%). Similarly, maximum male and female longevity was recorded on poultry diet (144.4 to 153 days) followed by sugar+wheat flour (122 to 126.6 days) and rusk diet (118.6 to 126.4 days). Whereas, the minimum mean incubation period was recorded on poultry diet (14.62 days) followed by sugar+wheat flour (16.19 days) and rusk diet (17.52 days). The minimum mean nymphal development period was recorded on poultry diet (38.38 days) followed by sugar+wheat flour (39.18 days) and rusk fed cockroaches (43.28 days).
 
 
 
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