scholarly journals Increasing early crops of unprotected tomatoes (Lycopersicon esculentum Mill.) with naphthoxyacetic acid applied on whole plants

2013 ◽  
Vol 42 (1-2) ◽  
pp. 35-46
Author(s):  
Krystyna Górecka ◽  
Leszek S. Jankiewicz
Keyword(s):  
Lycopersicon Esculentum ◽  
Gibberellic Acid ◽  
Active Ingredient ◽  
Total Yield ◽  
New Yorker ◽  
Lycopersicon Esculentum Mill ◽  
Whole Plant ◽  
Marked Decline ◽  
Whole Plants

A parthenocarpy-inducing preparation, Betokson, containing beta-naphthoxyacetic acid (NOA) as an active ingredient, was applied by spraying whole plants. As one of the controls, dipping the trusses in NOA solution was used according to a currently recommended technique. NOA applied by each of these treatment increased the very early yield (first 4 pickings) by 4-11 times in cv. Venture and 3-4 times in cv. New Yorker in comparison with the untreated controls. Treating the whole plant increased the very early yield more than did dipping the trusses. The early yield (first 8 pickings) was also increased in cv. Venture by NOA applied by both methods. Treatments with NOA decreased, however, the late yield. This decline was more marked with the higher NOA concentration and when the whole-plant-spray was applied. Gibberellic acid (GA<sub>3</sub>) applied alone as a whole-plant-spray at a concentration of 25 mg·dm<sup>-3</sup>, did not increase the very early yield but in combination with NOA, increased the early yield in cv. New Yorker. GA<sub>3</sub> alone, or in combination with NOA, applied as a spray on the whole plant caused marked chlorosis of the leaves and marked decline of the total yield.

Soil thermal and productive responses of biodegradable mulch materials in a processing tomato (Lycopersicon esculentum Mill.) crop

Soil Research ◽  
2016 ◽  
Vol 54 (2) ◽  
pp. 207 ◽  
Author(s):  
Marta M. Moreno ◽  
Alicia Cirujeda ◽  
Joaquín Aibar ◽  
Carmen Moreno
Keyword(s):  
Lycopersicon Esculentum ◽  
Soil Temperature ◽  
Agricultural Sector ◽  
Crop Yields ◽  
Total Yield ◽  
Fruit Weight ◽  
Climatic Conditions ◽  
Barley Straw ◽  
Processing Tomato ◽  
Lycopersicon Esculentum Mill

Mulch materials of different origin and colour are available in the agricultural sector as sustainable alternatives to the use of polyethylene (PE). Mulching modifies soil temperature and consequently affects crop yields. This work assessed the thermal and productive responses of different mulch materials in two different geo-climatic conditions during a 3-year integrated field study on processing tomato (Lycopersicon esculentum Mill.). Two biodegradable plastic mulches (BD1, BD2), one oxo-degradable material (OB), two types of paper (PP1, PP2) and one barley-straw cover (BS) were compared with two control treatments: black PE and manual weeding (MW). Soil temperature variables (maximum, minimum and mean temperature, soil growing degree-days and soil temperature amplitude) and production variables (marketable and total yield, mean fruit weight) were considered. Thermally, PE could be considered an atypical mulch causing higher temperatures in the soil, but it is not associated with a higher yield. Responses of PE, PP2 and MW were independent of the geo-environmental conditions, whereas OB, BD1 and BD2 had similar thermal and productive responses to each other in different environments. Tomato yield was correlated positively only with the minimum soil temperature, especially when excluding PE.

scholarly journals EFFETS DE TROIS TEMPÉRATURES NOCTURNES DE L’AIR SUR LES RENDEMENTS DE LA TOMATE DE SERRE CULTIVÉE EN SOL ET EN NFT

1989 ◽  
Vol 69 (1) ◽  
pp. 317-324
Author(s):  
CHRISTIAN CHOLETTE ◽  
DANIEL LORD
Keyword(s):  
Lycopersicon Esculentum ◽  
Air Temperature ◽  
Total Yield ◽  
Lycopersicon Esculentum Mill ◽  
Air Temperatures

The objective of this research was to evaluate the effects of low night-air temperatures on the early and total yields of the tomato (Lycopersicon esculentum Mill. ’Carmello’) grown with three stems in NFT and soil, in a greenhouse with small tunnels. Tomato was seeded on 16 Jan. and was grown under three night air temperatures (17, 12, 7 °C) for 2 mo after the sixth leaf had expanded and the first cluster was visible, say from 24 Feb. to 15 Apr. Total and marketable yields were significantly higher in NFT than in soil, but there was no advantage for the early yield. The date at which half the flowers of the first cluster opened was 2 wk earlier for the 17 °C treatment than for the 7 °C treatment, indicating that low night-air temperatures reduce the speed of development. Low night-air temperature significantly reduced the early yield, while the time to half of total yield increased by a factor of 2 wk in NFT and 1 wk in soil. Night air temperatures show large effects on the speed of development of the tomato and the earliness of the marketable yield.Key words: Tomato, greenhouse, night-air temperature, NFT, soil, early and total yields

The role of temperature and its relationship with gibberellic acid in the development of floral organs of tomato (Lycopersicon esculentum)

1983 ◽  
Vol 61 (4) ◽  
pp. 1258-1265 ◽  
Author(s):  
V. K. Sawhney
Keyword(s):  
Lycopersicon Esculentum ◽  
Gibberellic Acid ◽  
Floral Organs ◽  
Lycopersicon Esculentum Mill ◽  
Temperature Regimes ◽  
Intensity Of Response

The role of different temperature regimes (low, 18 °C day: 15 °C night (LTR); intermediate, 23 °C day: 18 °C night (ITR); and high, 28 °C day: 23 °C night (HTR)) in the development of tomato (Lycopersicon esculentum Mill.) flowers was studied. In general, flowers produced in LTR contained significantly greater numbers of petals, stamens, carpels, and locules than did plants grown in HTR. In ITR, the number of these organs was intermediate to plants grown in LTR and HTR, but was not significantly different from them in all cases. Gibberellic acid (GA3) also induced an increase in the number of petals, stamens, carpels, and locules; however, its effect was much greater on plants grown in ITR and HTR than on LTR, implying that LTR may produce at least part of its effect through increased levels of endogenous gibberellins. The intensity of response to different temperature regimes was variable for each of the three cultivars studied.

scholarly journals Genotypic and Chemical Influences on Fruit Growth of Tomato

HortScience ◽  
1990 ◽  
Vol 25 (10) ◽  
pp. 1255-1257 ◽  
Author(s):  
Henry R. Owen ◽  
Louis H. Aung
Keyword(s):  
Linear Regression ◽  
Lycopersicon Esculentum ◽  
Gibberellic Acid ◽  
Foliar Application ◽  
Fruit Size ◽  
Fruit Shape ◽  
Fruit Growth ◽  
New Yorker ◽  
Maturation Rate ◽  
Fruit Diameter

A relationship between ovary size at anthesis and final fruit diameter of 12 tomato (Lycopersicon esculentum Mill.) cultivars with a range of fruit sizes, shapes, and maturation rates was determined. `Fireball', `Michigan/Ohio Hybrid', and `New Yorker' produced nonfasciated, spherical fruits of intermediate maturation rate and showed a significantly higher correlation between ovary diameter at anthesis and final fruit diameter than `Small Fry', `Roma VF', `Early Cascade', `Campbell 1327', or `Ponderosa'. A linear regression of final fruit diameter at maturity on ovary diameter at anthesis of the cultivars was highly significant (r2 = 0.92**; ÿ = 22.5X - 0.3). Continuous root application of 0.01 μm BA to seedlings of `Fireball' significantly delayed anthesis. A single foliar application of 0.37 mM NOA to `Fireball' plants at the appearance of the first inflorescence significantly increased ovary diameter on the first inflorescence, but decreased ovary diameter on the second inflorescence. Treatment with NOA altered final fruit shape but not final fruit diameter. Single foliar applications of 0.1 mM GA stimulated stem and peduncle elongation but did not affect fruit size. Chemical names used: ß-naphthoxyacetic acid (NOA), N6-benzylaminopurine (BA), gibberellic acid, (GA).

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