SULPHUR DEFICIENCY AND TOXICITY SYMPTOMS IN GREENHOUSE TOMATOES AND CUCUMBERS

1976 ◽  
Vol 56 (1) ◽  
pp. 133-137 ◽  
Author(s):  
G. M. WARD
Keyword(s):  
Lycopersicon Esculentum ◽  
Plant Tissue ◽  
Fruit Production ◽  
Sand Culture ◽  
Plant Tissues ◽  
Morphological Effect ◽  
Sulphur Deficiency ◽  
Lycopersicon Esculentum Mill ◽  
Severe Deficiency ◽  
Greenhouse Tomatoes

Symptoms of sulphur deficiency and toxicity on greenhouse tomatoes (Lycopersicon esculentum Mill.) and cucumbers (Cucumis sativis L.) were produced experimentally in sand culture and are described in detail. The principal morphological effect was a general depression of growth and fruit production. A S content of less than 0.25% in any plant tissue was associated with severe deficiency. The distribution of S in various plant tissues is shown.

scholarly journals MANGANESE DEFICIENCY AND TOXICITY IN GREENHOUSE TOMATOES

1977 ◽  
Vol 57 (1) ◽  
pp. 107-115 ◽  
Author(s):  
G. M. WARD
Keyword(s):  
Lycopersicon Esculentum ◽  
Threshold Value ◽  
Sand Culture ◽  
Manganese Deficiency ◽  
Mn Toxicity ◽  
Severe Deficiency ◽  
Wide Range ◽  
Mn Content ◽  
Greenhouse Tomatoes ◽  
Apparently Healthy

Symptoms of manganese deficiency and toxicity on greenhouse tomatoes (Lycopersicon esculentum Mill.), produced experimentally in sand culture, were related to Mn content determined in tissues of leaves, petioles, stems, suckers, roots, and fruits. The highest concentration of Mn found in tissue showing deficiency symptoms was 25 ppm, although this level of Mn also was found in some healthy tissues. Severe deficiency was associated with all tissues, except fruit, that contained 20 ppm Mn or less. An exact threshold value for the onset of Mn toxicity was difficult to define, but probably occurred between 450 and 500 ppm for young top leaves and between 900 and 1,000 ppm for older lower leaves. The tomato plant will tolerate a wide range of Mn levels in apparently healthy tissue.

scholarly journals DESEMPENHO DO TOMATEIRO EM SISTEMA DE TUTORAMENTO VERTICAL EM ESPIRAL CONDUZIDO COM UMA OU DUAS HASTES

Nativa ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 338
Author(s):  
Juniomar Schmidt ◽  
Caroline Merlo Meneghelli ◽  
Marcelo Rodrigo Krause ◽  
Marcos Vinícius Hell ◽  
Milson Lopes de Oliveira ◽  
...  
Keyword(s):  
Experimental Design ◽  
Lycopersicon Esculentum ◽  
Fruit Production ◽  
Size Class ◽  
Indeterminate Growth ◽  
Driving System ◽  
Lycopersicon Esculentum Mill ◽  
Net Revenue ◽  
The Cost ◽  
Fruit Diameter

O objetivo deste trabalho foi avaliar a viabilidade agroeconômica do tomateiro em sistema de tutoramento vertical em espiral conduzido com uma ou duas hastes por planta. O delineamento foi em blocos casualizados em esquema fatorial 3x2, com quatro repetições, sendo avaliados três métodos de tutoramento: espiral, mexicano e estacas de bambu individuais na vertical e dois sistemas de condução: com uma haste e duas hastes por planta. Avaliou-se a produção de frutos por planta, diâmetro dos frutos, distribuição do número de frutos por classe de tamanho, altura das plantas e de inserção do primeiro cacho e o custo de produção. O método de tutoramento em espiral apresentou produção de frutos por planta semelhante ao método com bambu e superior ao mexicano. Quando as plantas foram conduzidas com uma haste, o diâmetro de frutos obtido no método em espiral foi superior ao método mexicano, entretanto, não diferiu do método com bambu. A receita líquida obtida no método em espiral foi superior à do método mexicano e inferior a do método com bambu. O tutoramento bambu vertical apresenta maior rentabilidade econômica quando comparado aos métodos espiral e mexicano. O tutoramento em espiral pode substituir o tutoramento mexicano, pois apresenta maior rentabilidade, credenciando-se como um novo método de tutoramento para o cultivo de tomate de crescimento indeterminado.Palavras-chave: Lycopersicon esculentum Mill, sistema de condução, crescimento indeterminado. TOMATO PERFORMANCE IN VERTICAL TUNA SYSTEM IN SPIRAL CONDUCTED WITH ONE OR TWO HASTES ABSTRACT:The current study aims to evaluate the agroeconomic viability of the tomato in a spiral vertical steerage system conducted with one or two stems per plant. The experimental design was in a randomized block with a 3x2 factorial, with four replications, and three tutoring methods were evaluated: spiral, Mexican and individual bamboo stakes vertically and two systems of conduction: with oneortwo stems per plant. Fruit production per plant, fruit diameter, number of fruits per size class, height of plants and insertion of the first cluster and the cost of production were evaluated. The spiral tutoring method showed fruit production per plant similar to the method with bamboo and superior to the Mexican one. When the plants were conducted with a stem, the fruit diameter obtained in the spiral method was superior to the Mexican method, however, did not differ from the method with bamboo. The net revenue obtained in the spiral method was higher than the Mexican method and lower than the method with bamboo. The vertical bamboo tufting presents greater economic profitability when compared to the spiral and Mexican methods. The spiral tutoring can replace the Mexican tutoring, since it presents greater profitability, being accredited as a new method of tutoring for the cultivation of undetermined growth tomato.Keywords: Lycopersicon esculentum Mill, driving system, indeterminate growth.

COMPARISON OF MEDIA FOR THE ISOLATION OF FUSARIUM OXYSPORUM F. SP. LYCOPERSICI FROM SAWDUST USED FOR GROWING TOMATOES

1974 ◽  
Vol 54 (2) ◽  
pp. 373-374
Author(s):  
M. G. ANDERSON ◽  
R. G. ATKINSON
Keyword(s):  
Lycopersicon Esculentum ◽  
Fusarium Oxysporum ◽  
Rose Bengal ◽  
Antimicrobial Agents ◽  
Potato Dextrose Agar ◽  
Selective Isolation ◽  
Streptomycin Sulphate ◽  
Lycopersicon Esculentum Mill ◽  
Agar Media ◽  
Greenhouse Tomatoes

Various agar media amended with antimicrobial agents were compared for the selective isolation of Fusarium oxysporum f.sp. lycopersici from sawdust used for growing greenhouse tomatoes (Lycopersicon esculentum Mill.). Potato dextrose agar amended with pentachloronitrobenzene (PCNB) (500 mg/l) and streptomycin sulphate (300 mg/l proved to be the most satisfactory medium, tested. These antimicrobial agents, unlike rose bengal, did not reduce the number of Fusarium colonies isolated.

MAGNESIUM DEFICIENCY IN GREENHOUSE TOMATOES

1969 ◽  
Vol 49 (1) ◽  
pp. 53-59 ◽  
Author(s):  
Gordon M. Ward ◽  
Marcia J. Miller
Keyword(s):  
Magnesium Deficiency ◽  
Tissue Level ◽  
Sand Culture ◽  
Tissue Analysis ◽  
Culture Experiment ◽  
Deficiency Symptoms ◽  
Severe Deficiency ◽  
Wide Range ◽  
Adequate Sampling ◽  
Greenhouse Tomatoes

In a sand culture experiment with greenhouse tomatoes, tissue analysis of plant samples showing a wide range of magnesium deficiency symptoms indicated that a tissue level of 0.30% Mg was associated with incipient deficiency and the beginning of symptom expression, while a level of 0.15% or less was associated with severe deficiency symptoms. These are definite values and it is suggested that they may be applicable to many crop plants, provided adequate sampling and accurate analyses are carried out.

scholarly journals Accumulation of Proline in NaCl-treated Callus of Six Tomato (Lycopersicon esculentum Mill.) Cultivars

1970 ◽  
Vol 17 (2) ◽  
pp. 217-220 ◽  
Author(s):  
A.N. Mohamed ◽  
M.H. Rahman ◽  
A.A. Alsadon ◽  
R. Islam
Keyword(s):  
Lycopersicon Esculentum ◽  
Key Words ◽  
Plant Tissue ◽  
Lycopersicon Esculentum Mill

Abstract not available Key words: Lycopersicon escutentum, Callus, Proline D.O.I. 10.3329/ptcb.v17i2.3242 Plant Tissue Cult. & Biotech. 17(2): 217-220, 2007 (December)

PLANT SPACING EFFECTS ON LIGHT INTERCEPTION BY GREENHOUSE TOMATOES

1988 ◽  
Vol 68 (4) ◽  
pp. 1197-1208 ◽  
Author(s):  
ATHANASIOS P. PAPADOPOULOS ◽  
DOUGLAS P. ORMROD
Keyword(s):  
Lycopersicon Esculentum ◽  
Sampling Period ◽  
Light Interception ◽  
Test Plant ◽  
Plant Spacing ◽  
Lycopersicon Esculentum Mill ◽  
Plant Canopies ◽  
Spacing Effects ◽  
Direct Light ◽  
Greenhouse Tomatoes

The effect of six equidistant spacings (23, 30, 38, 45, 53, 60 cm) on interception of photosynthetically active radiation (PAR) by four-row plantings of greenhouse tomato (Lycopersicon esculentum Mill. ’Jumbo’ and ’CR-6’) was studied. A silicon cell sensor was used to measure PAR in and around the test plant canopies. These observations were used to construct canopy profiles of PAR absorption, as affected by plant spacing and cultivar. Measurements under both clear and overcast skies revealed no major differences in the pattern of PAR interception within a canopy due to the presence or absence of direct light over the sampling period. The proportion of available PAR intercepted increased with closer plant spacing, but PAR penetration increased and distribution improved with increasing plant spacing. An increasing degree of self-shading of the central and north parts of the canopies was evident with closer planting. Plant spacing also had a large effect on the quality of canopy transmitted light. The ratios of blue:far-red, red:far-red and blue:red light transmitted through the four-row canopies of both cultivars decreased with decreases in plant spacing and in general were lower under the canopies of CR-6, than under the canopies of Jumbo.Key words: Tomato, Lycopersicon esculentum Mill., plant spacing, light interception

Sign in / Sign up

Export Citation Format

Share Document