Refine search
Results 1-10 of 1,746
Studies on loose smut of wheat
2001
Hasan, M.A.
Studies on population dynamics of aphids on wheat cultivars
2001
Bhutto, A.H.
Homogeneous seeds of 45 cultivars/lines including both progeny (coded lines) and commercial varieties were planted in row trial. Each line was 10 meter long, keeping 30 cm distance between row to row. Cultural practices were adopted as per recommendations of the Department except use of agrochemical this was avoided for proper exploitation of pest. Aphid population recorded on 2-2-99 averaged 0.091 plus-minus 0.011, 22-2-99 (1.716 plus-minus 0.027), 1-3-99 (4.670 plus-minus 0.046), 8-3-99 (4.750 plus-minus 0.03) and 15-3- 99 (0.7487 plus- minus 0.008) per 30 liters respectively. Varieties 1, 3, 4, 5, 14, 32, 37 were found susceptible while rest were resistance to aphid. Leaf length average was 28.12 plus-minus 0.166 cm, leaf breadth (1.410 plus-minus 0.021 cm) and total leaf area (39.650 plus-minus 0.752 cm2). Tillering capacity averaged 13.03 plus-minus 0.261/plant, grains 34.68 plus-minus 0.186 per spike respectively. Correlation work out indicated that mean aphid population had negative significant correlation with leaf length (r=-0.279), negative non significant with leaf breadth (r=-0.107) total leaf area b(r=-0.182), while positive and significant with tillers/plant (r=0.308) and negative highly significant with grains/spike (r=0.569). On the basis of present studies it may be concluded that all varieties were not equal infested by aphids, few were found resistant. It was further found that March 1st was the critical period of aphid infestation, at this stage plant acquire high chlorophyll also the climatic factors such as temperature and humidity favour the pest. As for as correlation of aphids with morphological characters are concerned a negative response of aphid population was observed toward leaf area, grain number and grain weight respectively.
Show more [+] Less [-]Effects of wheat seedling induced by jasmonic acid on feeding behaviour of wheat aphids
2001
Liu Yong | Chen Julian | Ni Hanxiang(CAAS, Beijing (China) Institute of Plant Protection)
Effect of intercropping wheat with forage legumes on wheat production and ground cover
2001
Tomm, G.O. | Foster, R.K.
Investiagition on paste property of Chinese wheat
2001
Yan Jun | Zhang Yong | He Zhonghu(Chinese Academy of Agricultural Sci., Beijing (China), Inst. of Crop Breeding and Cultivation)
Influence of storage method on wheat quality
2001
Marecek, J. | Sychra, L. (Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic))
Effect of auxin on different wheat varieties
2001
Arif, M. | Shah, P. (NWFP Agricultural Univ., Peshawar (Pakistan). Dept. of Agronomy) | Farooq-e-Azam | Ahmad, R.
To study the effect of IAA on different wheat varieties, an experiment was conducted at Malakandher Research Farm of NWFP Agricultural University, Peshawar during winter 1996-97 in a triplicated randomized complete block design with split plot arrangement. Thirty entries of diverse origin were planted in the experiment and at tillering stage 10-5 molar concentration of IAA was sprayed on half of the main plots at random. Application of 10-5 molar concentration of IAA increased plant height by 3.8 cm, spikes/m2 by 2, grain yield by 492 kg/ha and biological yield by 2183 kg/ha. Maximum plant height (108 cm) was noted in the sprayed plot of Triticales. Maximum number of 150 spikes/m2 were produced in sprayed plots of PR-59. Maximum biological and grain yield was produced by Inqilab-91.
Show more [+] Less [-]Effect of fertilization on varieties of winter wheat
2001
Ruckschloss, L.
In Research - breeding station Viglas - Pstrusa were researched 19 varieties of winter wheat at two different levels of fertilization since 1997. The aim was find out crop tested varieties, protein contents and wet gluten. The valuation of economy cultivation at different levels of fertilization was made too
Show more [+] Less [-]Investigations on increasing the conditioning efficiency of wheat
2001
Moawad, Jackie | Southan, Michael
Established and supported under the Australian Government’s Cooperative Research Centre Program
Show more [+] Less [-]Effects of S3307 and density on wheat yield
2001
Yang Wenyu | Han Huifang(Sichuan Agricultural University, Yaan (China), Coll. of Agriculture)
