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Division of Genetics and Plant Breeding, National Botanical Research Institute, Lucknow - 226 001, India.
DOI: https://doi.org/10.37855/jah.2003.v05i01.13
Key words: branches, correlation analysis, crop yield, cultivars, dry matter, genetic improvement, genetic variation, heritability, inflorescences, path analysis, plant breeding methods, plant height, sodic soils, soil types, stems, yield components, yield correlati
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Abstract: Eight exotic genotypes of Chenopodium quinoa were sown on normal and sodic soils in Lucknow, Uttar Pradesh, India, during 2000-01 to compare the grain yield potential, variability and genetic association among the different component traits (plant height, stem diameter, primary branches per plant, number of inflorescence per plant, inflorescence length and dry weight of plant) and their direct and indirect effects on yield. High heritability and moderate genetic advance was observed for inflorescence length and grain yield on sodic soil and for stem diameter, primary branches per plant, number of inflorescence per plant, dry weight of plant and inflorescence length on normal soil. Stem diameter and number of inflorescence per plant exhibited high direct path (0.837 and 0.761, respectively) and significant positive association (0.979 and 0.967, respectively) with grain yield on sodic soil, while dry weight of plant showed high correlation (0.889) and direct path (0.972) with grain yield on normal soil. The bre
PFDC, Division of Agricultural Engineering, IARI, New Delhi - 110 012, India.
DOI: https://doi.org/10.37855/jah.2003.v05i01.14
Key words: automation, computer hardware, computer software, decision making, greenhouses, protected cultivation
Abstract: This paper discusses the automation or support system for decision making in greenhouses. This automation is practised in the form of a computer program which are governed by setpoints. The choice of setpoints for environmental parameters must be done by a reasoning process integrating the situation outside the greenhouses, and inside situation that will be managed in an advantageous manner ensuring a profitable, though safe combination of growth and development factors while keeping the energy spending within acceptable bounds and as low as possible.
National Research Centre for Citrus, Amravati Road, PO Box 464, Nagpur - 440 010, Maharashtra, India.
DOI: https://doi.org/10.37855/jah.2003.v05i01.15
Key words: epidemiology, molecular genetics, pathogenicity, plant disease control, plant diseases, plant pathogenic bacteria, plant pathogens, reviews, strains
Abstract: Of all the agricultural pests and diseases that threaten citrus crops, citrus canker is one of the most devastating. The disease, caused by the bacterium Xanthomonas axonopodis pv. citri, occurs in large areas of the world's citrus growing countries including India. At least 3 distinct forms or types of citrus canker are recognized. Among these, Asiatic form (Canker A) is the most destructive and affects most of the major citrus cultivars. Severe infection of the disease produces a variety of effects including defoliation, dieback, severely blemished fruit, reduced fruit quality and premature fruit drop. Warm, humid, cloudy climate, along with heavy rainfall and strong wind promotes the disease. Control of canker in countries or regions where the disease is not present include quarantine or regulatory programme to prohibit introduction of infected citrus plant material and fruit, as well as continuous and strict surveying in the field and the immediate destruction of infected trees. In countries where canker
Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore - 641 003, India.
DOI: https://doi.org/10.37855/jah.2003.v05i01.02
Key words: boron, calcium, chemical composition, copper, crop yield, foliar diagnosis, iron, leaves, magnesium, manganese, methodology, mineral content, mineral deficiencies, nitrogen, nutrient content, nutrient deficiencies, phosphorus, plant composition, plant nut
Abstract: The optimum levels for 12 nutrients (N, P, K, Ca, Mg, Na, S, B, Zn, Cu, Fe and Mn) in the leaves of turmeric were generated using Diagnosis and Recommendation Integrated System (DRIS)/Modified Diagnosis and Recommendation Integrated System (MDRIS) and Compositional Nutrient Diagnosis (CND) approaches. Approximately 500 soil and leaf samples were obtained from commercial fields in Coimbatore, Tamil Nadu, India, during July-September 2000. Using the new norms of DRIS/MDRIS, the extent of deficiency of none of the micronutrients (Zn, B and Fe) matched with the values assessed with the soil analysis. Approximately 9% of the turmeric growing area was severely limited by mineral nutrition. Approximately 20% was identified as having possible imbalances. Based on the order of requirement, predominance of Zn deficiency was well indicated by CND than DRIS. The order of nutrient imbalance was in the order S > B > Mg > Cu > P > Na > Ca > K > Zn > N > Fe > Mn based on DRIS, S > B > Cu > Ca > Na > Zn > Mg > P > Fe > Mn > K
Department of Horticulture, G.B. Pant University of Agriculture and Technology, Pantnagar - 263 145 (Uttaranchal), India.
DOI: https://doi.org/10.37855/jah.2002.v04i02.28
Key words: crop yield, cultivars, girth, growth, leaf area, yield components
Abstract: The performance of 24 ber (Z. mauritiana) in terms of growth, yield and yield components were studied under the tarai conditions of Uttaranchal, India during 1998-99. Sanaur 6 recorded the highest tree height (5.75 cm) and spread (11.90 m), trunk girth (2.13 m), cross trunk sectional area (3616.08 cm2) and volume (1698.39 m3). Rohtak Gola, Seo, Nazuk, Narikeli and Sanaur 2 recorded the highest shoot length (248 cm), number of leaves per shoot (515.50), leaf length (10.68 cm), length:breadth ratio (2.32) and photosynthetic efficiency (0.182 mg/cm2/h), respectively. Sanaur 3 recorded the highest leaf breadth (7.71 cm) and area (43.19 cm2); ZG3 recorded the highest number of fruits per shoot (50.50) and per tree (11665.50), and yield (214.40 kg); and ZG 2 recorded the highest yield efficiency by weight (0.215 kg/cm2) and number of fruits per m3 volume of tree (59.05).
Plant Genetics and Biotechnology Division, Central Agricultural Research Institute, Port Blair - 744 101, Andamans, India.
DOI: https://doi.org/10.37855/jah.2002.v04i02.29
Key words: auxins, benzyladenine, culture media, cytokinins, fruits, IBA, in vitro culture, micropropagation, NAA, pineapples, plant growth regulators, rooting, shoots, suckers, tissue culture
Abstract: Axillary buds from crown of mature fruits, slips and suckers of pineapple cv. Queen cultured in MS medium supplemented with high auxin:cytokin ratio and then transferred to MS medium with high cytokinin:auxin ratio showed high establishment percentage. Shoot multiplication increased upon subculture on freshly prepared MS medium supplemented with benzyladenine (BA). The best multiplication medium was an MS medium supplemented with 2.5 mg BA/litre, 2 mg NAA and IBA/litre and 10% coconut water. In vitro grown shootlets were successfully rooted in MS medium supplemented with 0.5 mg NAA and IBA/litre. The highest number of buds produced in 6 months was obtained from shaken liquid medium. Pulsing of explants enhanced the culture response as indicated by higher shoot multiplication rate in all types of explants.
Department of Horticulture, G.B. Pant University of Agriculture and Technology, Pantnagar - 263 145, Uttaranchal, India.
DOI: https://doi.org/10.37855/jah.2002.v04i02.30
Key words: budding, cultivars, flowering, flowers, growth, rootstock scion relationships, rootstocks, roses, scions, sprouting, vigour
Abstract: Bud take, growth and flowering were evaluated in Rosa indica [R. chinensis] cultivars Odorata and Briar, R. macrophylla and R. clinophylla budded with cultivars Super Star, Happiness, Eiffel Tower and Kiss of Fire. Bud take at 2 weeks after budding was greatest for R. indica cv. Odorata budded with Super Star (80%). R. macrophylla budded with Eiffel Tower recorded the lowest number of days to sprouting (21.33 days). R. indica cv. Odorata budded with Super Star produced the tallest plants (37.67 cm) at 6 months after budding. However, at 15 months after budding, the tallest plants were obtained with R. clinophylla budded with Kiss of Fire (119.67 cm) and R. indica cv. Briar budded with Kiss of Fire (119.33 cm). At 6 months after budding, the greatest plant spread was recorded for R. indica cv. Odorata budded with Happiness (55.63 cm) and R. indica budded with Happiness (54.67 cm). Super Star budded on R. indica cv. Odorata produced vigorous plants. At 15 months after budding, R. indica cv. Briar budded with Ha
Department of Horticulture, Punjab Agricultural University, Ludhiana - 141 004, India.
DOI: https://doi.org/10.37855/jah.2002.v04i02.31
Key words: colour, crop quality, crop yield, fruits, thinning
Abstract: The effects thinning at different crop growth stages (at pink bud stage, at full bloom, at fruit set, and after 7, 14, 21, 28, 35 and 42 days of fruit set) on the fruit size, colour and yield of peach cv. Flordaprince were determined in a field experiment conducted in Ludhiana, Punjab, India during 1998-99. The fruit length, breadth and yield of peach were highest when thinning was carried out during the pink bud stage. Data are presented on the effects of thinning n the colour of the fruits.
Central Institute for Subtropical Horticulture, PO Kakori, Rehmankhera, Lucknow - 227 107, India.
DOI: https://doi.org/10.37855/jah.2002.v04i02.32
Key words: crop yield, fruits, genetic effects, genetic variation, genotypes, grapes, heritability, organic acids, phenotypic variation, reducing sugars, seed weight, yield components
Abstract: The phenotypic and genotypic coefficients of variability, heritability along with genetic advance for yield and yield components of 14 early maturing grape genotypes were studied. The differences among the genotypes were highly significant (p=0.05) for all the characters (except bunch length) studied. A wide range of variation was recorded for bunch width, number of berry per bunch, 100-berry weight, 100-seed weight, juice content, total soluble solids, reducing sugar, organic acid content and berry yield. Based on the coefficient of variation, broad sense heritability and expected genetic advance, it can be concluded that berry yield, 100-berry weight, 100-seed weight and organic acid content provides a greater scope for selection of superior genotypes. Among the 14 genotypes, Flame seedless produced the highest (17.6 t/h) berry yield; Cardinal registered highest (275.6 g) 100-berry weight with high (6.5 g) 100-seed weight; and Pusa Navrang showed highest organic acid content and 100-seed weight (6.7 g). The
Lebanese Agricultural Research Institute, Department of Irrigation and Agro-Meteorology, Tal Amara, P.O. Box 287 Zahle, Lebanon.
DOI: https://doi.org/10.37855/jah.2002.v04i02.21
Key words: ammonium nitrate, crop yield, dry matter accumulation, evapotranspiration, irrigation, leaf area index, lettuces, nitrogen, nitrogen fertilizers, use efficiency
Abstract: Studies were conducted to determine the effects of irrigation on the yield and nitrogen recovery of field grown lettuce in the Bekaa Valley of Lebanon under non-limiting soil N conditions. Within the experimental plots, irrigation differentiation was made upon crop evapotranspiration (ETc) measured on a non-weighing lysimeter of 16 m2. The treatments included a control, I-100, irrigated at 100% of ETc, and two water deficit treatments, I-80 and I-60, irrigated at 80 and 60% of ETc, respectively. Prior to planting, all plots received fertilizers broadcast at a rate of 250 kg/ha of NPK-fertilizer (17%). At 6- and 12-leaf stages, ammonium nitrate (34.5%) was applied with irrigation water in two applications of 125 kg/ha each. Local groundwater containing 10 mg N-NO3/litre was used for irrigation. Yield was determined in a final destructive harvest. Crop evapotranspiration reached on the lysimeter a total of 433 mm for a total growing period of 70 days. Water stress caused by the deficit irrigations significantly
Laboratoire de Genetique et Amelioration des Plantes, Institut National Agronomique de Tunis (INAT), 43 Avenue Charles Nicolle, 1002 Tunis, Tunisia.
DOI: https://doi.org/10.37855/jah.2002.v04i02.22
Key words: 2,4 D, auxins, benzyladenine, callus, cotyledons, cucumbers, culture media, cytokinins, embryogenesis, hypocotyls, in vitro culture, melons, methodology, plant growth regulators, tissue culture
Abstract: Within the framework of genetic improvement of Tunisian Snake-melon (Cucumis melo) cultivar by biotechnological methods, we have developed a method to regenerate whole plants by in vitro culture using cotyledon and hypocotyl as explants on MS medium with different combinations and concentrations of auxin and cytokinin. Adventitious buds were initiated from hypocotyls grown on medium with 1.5 mg 2,4-D/litre and 0.5 mg benzyladenine/litre. A maximum percentage of embryogenesis (20%) was obtained for cotyledons grown in MS medium containing 0.5 mg 2,4-D/litre and 1 mg kinetin/litre. For stimulating the development of adventitious buds and the embryo's germination and their conversion into plants, MS medium diluted twenty times and supplemented with 1.5% sucrose was used. Histological studies showed that adventitious buds were initiated from the peripheral zones of the organogenic calluses by aggregation of meristematic cell masses which organized into a typical shoot meristem. Embryoids resulted from the divisio
Department of Horticulture, N.D. University of Agriculture & Technology, Narendra Nagar (Kumarganj) - 224 229, Faizabad (UP), India.
DOI: https://doi.org/10.37855/jah.2002.v04i02.23
Key words: acidity, ascorbic acid, calcium nitrate, crop quality, fruits, phenols, reducing sugars
Abstract: The effects of preharvest spraying of 1% calcium nitrate, 0.1% Topsin-M and 0.1% Bayleton, alone or in combination on aonla (Emblica officinalis [Phyllanthus emblica]) cv. NA-6 were determined. The treatments were sprayed 10 and 20 days before harvest. Treatment with 1% calcium + 0.1% Bayleton resulted in increased total soluble solids (8.4%), total sugars (6.93%) and total phenol (13.3%), and reduced levels of losses in acidity (8.8%), ascorbic acid (22.32%) and reducing sugars (12.8%). The treatment also prolonged the shelf-life of fruits up to 20 days compared to 10 days in control. Thus, this treatment doubled the shelf-life of aonla fruit in storage at ambient temperatures.
Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore - 560 089, India.
DOI: https://doi.org/10.37855/jah.2002.v04i02.24
Key words: corms, crop quality, crop yield, flowering, harvesting date, leaf area, leaves, plant height, postharvest decay, spikes, yield components
Abstract: The effects of the number of days between flowering and corm harvesting on the performance of crops produced from harvested corms were studied in Hessaraghatta, Bangalore, Karnataka, India. Corms of gladiolus cv. Pink Friendship were harvested at 30, 45, 60, 75, 90, 105, 120 or 135 days after flowering (DAF). Plants grown from corms harvested at 45 and 60 DAF were the tallest (94.13 and 94.9 cm). Harvesting of corms at 45, 60, 75, 90 and 105 DAF resulted in the greatest number of leaves per plant (8.78, 8,83, 8.65, 8.29 and 8.46) and leaf breadth (3.40, 3.63, 3.43, 3.33 and 3.48 cm). Scape width was greatest in plants produced from corms harvested at 45 (2.99 cm), 60 (3.08 cm) and 75 DAF (2.85 cm). Harvesting of corms at 60 DAF resulted in the greatest floret diameter (12.92 cm), spike length (86.26 cm), rachis length (45.99 cm), and number of florets per spike (13.87), and in the lowest incidence of corm rot (23.78%). Corms harvested at 45 and 60 DAF were superior in terms vegetative growth, flower productio
Department of Vegetable Science, G.B. Pant University of Agriculture and Technology, Pantnagar - 263 145, Uttaranchal, India.
DOI: https://doi.org/10.37855/jah.2002.v04i02.25
Key words: branches, crop yield, direct sowing, earliness, emergence, flowering, flowering date, flowers, fruits, harvesting date, internodes, planting date, seed germination, seeds, shoots, transplanting, yield components
Abstract: The performance of bitter gourd (Momordica charantia cv. Jaunpuri Local) grown by direct sowing or transplanting at 15 January, 29 January, 12 February, 26 February or 12 March was evaluated in Pantnagar, Uttaranchal, India during the spring-summer season of 2000. Seeds sown directly in the open field on 15 and 29 January failed to germinate. For the other dates, seed germination was observed at 15.0 to 19.3 days after sowing. Main shoot length, number of branches arising from the main shoot, and internode length increased with the delay in transplanting. Greater shoot length was obtained under transplanting. The diameter of the main shoot decreased with the delay in direct sowing or transplanting. Flower emergence was earliest with transplanting on 26 February. In general, pistillate flowers emerged at 5-15 days after the emergence of staminate flowers. The formation of flowers on the lower nodes was more pronounced under transplanting. The lowest male flower position was obtained with transplanting on 12 Ma
Central Institute for Subtropical Horticulture, Rehmankhera, P.O. Kakori, Lucknow - 227 107, India.
DOI: https://doi.org/10.37855/jah.2002.v04i02.26
Key words: application rates, ascorbic acid, chemical composition, crop quality, crop yield, cultivars, foliar spraying, fruits, guavas, leaves, plant composition, reducing sugars, shoots, urea
Abstract: The effects of foliar application of urea (10, 20, 25 and 30%) as the main source of N on the growth and leaf N composition of the guava cultivars Sardar and Allahabad Safeda were determined in a field experiment conducted in Lucknow, Uttar Pradesh, India. Urea-N, ammonium-N and nitrate-N in the shoot and fruits were highest with the single application of 30% urea and double application of 20% urea in Allahabad Safeda and Sardar, respectively. Crop yield in both cultivars decreased with increasing urea concentration during the rainy season. Fruit weight, total soluble solids, and ascorbic acid and reducing sugar content were highest with foliar spraying of 25% urea on Allahabad Safeda and decreased with increasing urea concentration in Sardar.
