HortFlora Research Spectrum

93 - 102

Authors: A.K.Singh and V.K.Umrao

Faba bean (Vicia faba L.) is, among the oldest crops in the world, attacked by a wide range of pathogens although each of these dis eases is quite destructive, when two or more interacton the same plant, their combined effect be comes greater. Good agronomic practices are in general non monetary interventions, discussed here under suitable heads, which can be easily adopted by the farmers to manage faba bean disease smartly. It is an efficient and excellent tool for effective disease-pest management in general and especially for soil borne pathogens and diseases like chocolate spot,ascochyta blight and rot etc.

109 - 115

Authors: R.G. Somkuwar; Roshni R. Samarth; J. Satisha; S.D. Ramteke; Prerna Itroutwar

The experiment was conducted at NRC for Grapes, Pune during year 2007-08.Four commercially cultivated grape varieties viz. Thompson Seedless, Tas-A-Ganesh,Flame Seedless and Sharad Seedless were analyzed for dry matter content during harvesting stage of the crop. Dry matter partitioning in different parts of vines were observed. Highly significant differences were observed among varieties, various vine parts and their combinations. Among the varieties, maximum dry matter content was recorded in Sharad Seedless (42.87%) followed by Tas-A-Ganesh (42.29%) and among the various parts of the vine, it was found maximum in cordon (54.84%) followed by trunk (54.39%). When dry matter content was measured in particular variety in specific part of the vine, maximum dry matter was recorded in the trunk of Sharad Seedless variety. Roots are the source of nutrient absorption by the vine. Root health found to be positively correlated with the health of the plant and productivity. In the present experiment, highest dry matter content of the roots was observed in the Sharad Seedless with the mean value of 47.72%. Also the dry matter content of the harvestable organ (bunches) was found maximum in Sharad Seedless (25.73%) as compared to other variety.

121 - 125

Authors: S. Karthikeyan and M. Jawaharlal

The experiment on optimization of plant density in side a green house for growing carnation is a very important area for present day production and productivity. The results of the study on optimization of planting density in carnation led to the inference that planting density in treatment T4 (check) (15 X 15 cm with 36 plants/m2) proved better in terms of flower quality parameters namely early flower bud appearance, bud opening, longest duration of flowering, chlorophyll content and more number of flowers per plant due to congenial micro climate between the plants for the plant growth and flowering. Though the percentage of ‘A’ grade quality flowers were higher in treatment T3 (20 X 20 cm with 20 plants per m2), the number of plants and flower yield per sq. m. in this treatment was very less. Hence, treatment T4 (check) with 15 X 15 cm spacing may convincingly be followed for obtaining more number of flowers per plant and per unit area and value in terms of economic success of the crop.

130 - 134

Authors: Sunil Kumar, Krishna S. Tomar, R.C. Shakywar and M. Pathak

Powdery mildew caused by the fungus Erysiphe cichoracearum DC. is a common disease of gerbera grown in Indian conditions. Fungicidal and varietal trial was conducted at Instructional farm, Department of Floriculture, College of Horticulture and Forestry, Central Agricultural University, Pasighat, during April 2011 to March 2012. In fungicidal disease management, least disease severity (5.23%) was observed in spray of wettable sulphur @2.5g/l of water followed by Carbendazim @ 2g/l of water foliar spray (7.23 %). Whereas, the unprotected treatment showed highest disease severity (65.30 %). The highest number of flowers m-2/year (195.00) and number of suckers / plant / year (6.60) were also recorded in wettable sulphur @ 2.5g/l of water foliar spray. Powdery mildew symptoms were first observed on the leaves of the varieties viz. Pia, Rionegro and Tecala on 30th day after planting. In Manizales, Teresa and Galileo powdery mildew incidence was started only after 38 days of planting. On the other varieties Figaro, Marinila and Palmira powdery mildew incidence was started only after 68 days of planting. Palmira variety showed resistance to powdery mildew with per cent disease index of 9.27% at the end of 160 days after planting followed by Figaro and Marinila with PDI of 9.73% and 10.23%, respectively. Variety Teresa showed moderately resistant reaction (24.57 %) against powdery mildew infection. Varieties Pia and Tecala were highly susceptible to powdery mildew through out the experiment which showed per cent disease index of 65.30% and 54.27%, respectively. Other varieties like as Galileo (34.73%), Manizales(46.93%) and Rionegro (49.67%) showed susceptible reaction to powdery mildew infection.

139 - 144

Authors: K.. K. Singh, Tejpal Singh and Y.K. Tomar

The experiment was conducted under mist chamber at Horticulture Research Centre, HNB Garhwal University, Chauras Campus Srinagar (Garhwal), Uttarakhand. The different length stem cuttings (20, 35 and 50 cm) of Bougain vil lea cv. Torch Glory treated with IBA solutions at 3000, 4000 and 5000 mg L-1 by quick dip method were planted carefully in the root trainers. Among all the treatments, maximum number of sprouted cuttings (90.0%) and maximum number of sprouts per cutting (30.22) were observed under C1L2 (35 cm long cuttings treated with 3000 ppm IBA) treatment, maximum length of sprout per cutting (3.25 cm) and maximum height of plant (63.86 cm) was found under C1L3 (50 cm long cuttings treated with 3000 ppm IBA), maximum diameter of sprouts per cutting (0.74 cm) was recorded under C3L1(35 cm long cuttings treated with 5000 ppm IBA). Number of leaves on new growth (7.48) was found maximum under C3L3 (50 cm long cutting treated with 5000 ppm IBA), length of longest root (9.90 cm) was maximum under C2L3 treatment (50 cm long cutting treated with 4000 ppm IBA), profuse callus formation (77.77%) was found in C1L1 treatment (50 cm long cutting treated with 3000 ppm IBA) and secondary rooting (77.77%) was found better under C1L2 and C1L3 (35cm and 50 cm long cuttings treated with 3000 ppm IBA) treatments.

150 - 152

Authors: Pravina Satpute, S.G. Bharad and Snehal Korde

The experiment was conducted at Main Garden of Department of Horticulture, Dr.PDKV, Akola to study the effect of spacing and plant architecture on yield and economics of capsicum under nethouse condition.The experiment was laid out in Split Plot Design with four replications in aluminated net house. There were three levels of plant spacing and three levels of pruning together making nine treatment combinations.The treatments included three levels of plant spacing S1 =45 x 30 cm, S2 =45 x 45 cm and S3 = 45 x 60 cm, and three levels of plant architecture P1 - pruned for four stem, P2 -pruned for two stem and P3 –unpruned. The results of present investigation indicate that yield per hectare was highest at in closer spacing (S1) and four stem pruning (P1). While, the wider spacing treatment (S3) and unpruned (P3) recorded minimum values in these respect. The treatment combination S1P1 (45 x 30 cm spacing along with the four stem pruning) have recorded the maximum values regarding yield per hectare. However, the cost; benefit ratio was found to be highst in plant spaced at 45cm x 45cm with four stem pruning (S2P1) and it was followed by S1P1 and S2P2.

158 - 161

Authors: F.G. Sayyad, S.S. Chinchorkar, S.K. Patel and B.K. Yaduvanshi

Citrus is of high importance in agriculture now days and a substantial source of income for the producing countries. Physical and frictional properties of fruits as well as oranges are important for design of postharvest handling and processing machineries. The present work was undertaken to determine the spatial dimensions, equivalent diameter, sphericity, weight,volume, specific gravity and coefficient of friction of Phule Mosambi and Kinnow or Tangerine (Citrus reticulata). The average equivalent diameter, sphericity, weight, volume and specific gravity for Phule Mosambi was 65.68 mm, 0.96, 165.14 g, 170.31 cm3 and 1000.5 kg/m3 and that of Kinnow fruits was 66.44 mm, 0.95, 156.71 g, 146.97 cm3 and 1086 kg/m3. The average coefficient of friction over ply wood, aluminium and mild steel was 039, 0.43 and 0.45, respectively for Phule Mosambi and in case of Kinnow it was 0.36, 0.41 and 0.42, respectively.

166 - 168

Authors: R.C. Shakywar, S.P. Pathak, Krishna S. Tomar and M. Pathak

The present investigation was carried out to evaluate the effect of date of sowing on per cent plant infection, per cent disease intensity, coefficient of disease index and yield attributes of taro (Colocasia esculenta var. antiquorum). The crop sown during 15th February gave highest cormel yield, despite maximum per cent plant infection, per cent disease intensity and coefficient of disease index in comparison to crop sown at 15th March, 15th April and 15th May during the Kharif 2006 and 2007 crop ping season, respectively.

172 - 174

Authors: S.P. Tiwaria Arti Guhey and S.P. Mishra

Experiment was conducted at Precision Farming Development Centre IGKV, Raipur during kharif 2008-09 and 2009-10 in split plot design comprising of three varieties (Deshi, hybrid and composite) of corn as a main plot while bio fertilizers and nitrate salts combination in sub plot treatments. Observations were taken at specific growth phases of the crop which clearly indicated superiority of association of grain yield with different yield contributing morpho-physiological traits of corn.

178 - 179

Authors: J. Singh, P. Bhatnagar and Bhim Singh

During Kharif season weed poses serious threats in mandarin orchards and some times the infestation of weed flora is so high that it creates great challenge in maintaining the plant growing and surviving properly. To counter weed problem, weedicides have proven its worth. Labour availability getting problematic day by day, option of weed control rests with the view of weedicide with such an idea an experiment was conducted with a view to assess the efficacy of weedicide in countering weed growth in newly grown mandarin orchard. The orchard was having heavy infestation of Echinocola cholena, Celosia sp, Cassia tora, Comelina communis, C. benghalensis, Abelmoschus muschatus, Euphorbia xeniculata, Parthenium hysterophorus, etc. From the experiment it appeared that Isoproturon 75% WP@ 2% was found most efficacious out of 2, 4-D , Oxyflourfen, Glyphosate and Imazethapyr used to control weeds in mandarin orchard.

182 - 183

Authors: Sanjive Kumar Singh, Naushad Khan and S.D. Dutta

Field experiment was conducted at Department of Vegetable Science, Chandra Shekhar Azad University of Agriculture and Technology Kalyanpur, Kanpur on zamikand variety Azad Suran-1 with the objective to work out the optimum spacing between plant to plant and row to row and suitable seed size for general cultivation. The experiment with five different seed sizes and four spacings was conducted. Results revealed that 75 X 75 cm spacing with 0.750 kg weight of corm was relatively economical over 1.000 kg seed weight at the same spacing.