scholarly journals Watermelon Transplant Age: Influence on Fruit Yield

HortScience ◽  
1993 ◽  
Vol 28 (8) ◽  
pp. 789-790 ◽  
Author(s):  
Charles S. Vavrina ◽  
Stephen Olson ◽  
J.A. Cornell
Keyword(s):  
Cell Size ◽  
Field Trial ◽  
Citrullus Lanatus ◽  
Field Tests ◽  
Fruit Yield ◽  
Trial Site

Total fruit yield of watermelon [Citrullus lanatus (Thunb.) Matsum. and Nakai] in Florida field tests was unaffected by transplant age (3, 4, or 5 weeks from seeding) or modular cell size (18.8, 30.7, or 60.5 cm3), but was affected by trial year. A further study revealed that early and total fruit yields at two field sites were unaffected by transplant age, ranging from 3 to 13 weeks, when grown in the same modular cell size (34 cm3), but were affected by field trial site. We conclude that transplant age or modular cell size is of little importance relative to post-transplanting conditions (site or year) in influencing watermelon fruit yield.

scholarly journals COMBINING ABILITY OF FORAGE WATERMELON ( Citrullus lanatus var. citroides ) GERMPLASM

2017 ◽  
Vol 30 (3) ◽  
pp. 768-775 ◽  
Author(s):  
ROBERTA MACHADO SANTOS ◽  
NATONIEL FRANKLIN DE MELO ◽  
MARIA ALDETE JUSTINIANO DA FONSECA ◽  
MÁRIO ADRIANO ÁVILA QUEIROZ
Keyword(s):  
Protein Content ◽  
Dry Matter ◽  
Citrullus Lanatus ◽  
Fruit Yield ◽  
F1 Hybrids ◽  
In Vitro Digestibility ◽  
Ethereal Extract ◽  
Selection For ◽  
Number Of Seeds

ABSTRACT The aim of this study was to identify parents and promising hybrid combinations for the improvement of forage watermelon. Five parents were evaluated: BGCIA 996 (1), BGCIA 997 (2), BGCIA 998 (3), BGCIA 228 (4), Jojoba (5) and ten F1 hybrids, which were obtained from balanced diallel crosses. The experimental design was in a complete randomized block, with three replications. The morphoagronomic and bromatological traits were evaluated. The highlights were the progenitors BGCIA 997, BGCIA 998, BGCIA 228 and Jojoba for protein content, fruit yield, in vitro digestibility of dry matter and number of seeds, respectively. The hybrid 1x4 stood out for fruit length, seed number, and ethereal extract. The hybrid 2x3 stood out for rind and pulp thickness while the hybrids 3x4, 3x5 and 4x5 had exceptional digestibility, protein content and fruit yield, respectively. The analysis of the standard deviation of the SCA estimates of both SD (Sij- Sik) and SD (Sij- Skl) indicated that no hybrids were found that had SCA estimates twice that of SD (Sij- Sik) or SD (Sij- Skl), except for the hybrid 1x4 for the number of seeds per fruit. These results suggest that the parents were more promising than the hybrids. Similarly, the GCA estimates favor the intrapopulation method, which will promote greater efficiency in selection for genetic gains.

scholarly journals Effect of nitrogen doses on disease severity and watermelon yield

2009 ◽  
Vol 27 (3) ◽  
pp. 330-334 ◽  
Author(s):  
Gil R dos Santos ◽  
Manoel D de Castro Neto ◽  
Hudson SM de Almeida ◽  
Leandro N Ramos ◽  
Renato A Sarmento ◽  
...  
Keyword(s):  
Disease Severity ◽  
Nitrogen Fertilization ◽  
Citrullus Lanatus ◽  
Fruit Yield ◽  
Control Treatment ◽  
Average Weight ◽  
Stem Blight ◽  
Gummy Stem Blight ◽  
Yield And Quality ◽  
Severity Levels

Nitrogen fertilization is an important step for watermelon (Citrullus lanatus) production due to its influence over yield, fruit quality, and disease severity. Currently, the gummy stem blight (Didymella bryoniae) and the downy mildew (Pseudoperonospora cubensis) can be taken as the most important watermelon diseases, since they impose severe impairment to the crop. Furthermore, studies focusing on plant responses to nitrogen fertilization regarding fruit yield and quality, and disease resistance are rare. Hence, the present study aimed at evaluating the effect of nitrogen doses on fruit yield and quality, and on disease prevalence in watermelon. Two experiments were carried out at the Universidade Federal de Tocantins, employing sprinkler irrigation, in an area previously used to grow watermelon. The experimental design was blocks at random, with five treatments (N doses, applied twice as side-dressing, in kg ha-1, as follows: T1= control treatment without N, T2= 20, T3= 40, T4= 80, and T5= 120), and four replications. Urea (45% N) was used as the N source. In the first assay, the highest fruit yield and average weight were observed when 40 kg ha-1 of N were applied. The highest severity of the gummy stem blight was observed when the highest nitrogen doses were applied (80 and 120 kg ha-1). In the second assay, the highest severity levels of the gummy stem blight, as well as of mildew, were observed again when N doses were the highest (80 and 120 kg ha-1). The lowest severity levels for both diseases were observed in the control treatment.

Observational Assessment Of Field Trial Site For The Implementation Of A PACS Network

1989 ◽  
Author(s):  
Marjorie A. Coristine ◽  
Jo W. Tombaugh ◽  
Richard F. Dillon
Keyword(s):  
Field Trial ◽  
Observational Assessment ◽  
Trial Site

scholarly journals Effect of vine and fruit pruning on yield attributes of two watermelon (Citrullus lanatus) cultivars

2021 ◽  
Vol 35 (3) ◽  
pp. 269-275
Author(s):  
Assinapol Ndereyimana ◽  
Bancy Waithila Waweru ◽  
Boniface Kagiraneza ◽  
Arstide Nshuti Niyokuri ◽  
Placide Rukundo ◽  
...  
Keyword(s):  
Citrullus Lanatus ◽  
Block Design ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Yield Attributes ◽  
Significant Difference ◽  
Randomized Complete Block Design ◽  
Short Rains ◽  
Animal Resources ◽  
Pruning Methods

This study was carried out to determine the effect of vine and fruit pruning on watermelon (Citrullus lanatus) yield. Five pruning methods: P1=no pruning at all, P2=pruning to four vines with two fruits per vine, P3=pruning to four vines with one fruit per vine, P4=pruning to three vines with two fruits per vine and P5=pruning to three vines with one fruit per vine were evaluated on two watermelon cultivars: ‘Sugar baby’ and ‘Julie F1’ under a factorial randomized complete block design with three replications. Investigations were carried out in the seasons 2017A (short rains) and 2017B (long rains) at Karama and Rubona experimental sites belonging to Rwanda Agriculture and Animal Resources Development Board. The obtained results indicated a significant difference among the different cultivars and pruning methods tested during both seasons and at two sites. Generally, all studied parameters recorded higher values during season 2017B than in season 2017A at Rubona site. A similar trend was recorded at Karama site except that the fruit yield per plant and per hectare for plants which were pruned to three vines with one fruit reduced during season 2017B as compared to season 2017A. The highest number of fruits per plant, fruit weight, fruit yield per plant and per hectare was recorded in ‘Julie F1’ compared to ‘Sugar baby’ at both sites and during both seasons. Higher fruit weight was obtained when both cultivars were pruned to three or four vines with one fruit per vine. Higher number of fruits per plant and higher fruit yield per plant was observed under pruning to four vines with two fruits per vine at Rubona site; while at Karama site, higher fruit yield per plant was recorded under pruning to three vines with one fruit or two fruits per vines and pruning to four vines with two fruits per vine. A similar trend was observed in fruit yield per hectare. Based on results of the current study, cultivation of the hybrid ‘Julie F1’ and pruning to three vines with one fruit per vine is recommended for optimum watermelon yield with big-sized fruits.

scholarly journals Effects of Inoculations with Mycorrhizal Fungi of Soilless Potting Mixes During Transplant Production on Watermelon Growth and Early Fruit Yield

HortScience ◽  
2008 ◽  
Vol 43 (2) ◽  
pp. 354-360 ◽  
Author(s):  
Andreas Westphal ◽  
Nicole L. Snyder ◽  
Lijuan Xing ◽  
James J. Camberato
Keyword(s):  
Plant Growth ◽  
Mycorrhizal Fungi ◽  
Citrullus Lanatus ◽  
The United States ◽  
Crop Productivity ◽  
Fruit Production ◽  
Fruit Yield ◽  
Infested Soil ◽  
Positive Effects ◽  
And Function

Watermelon, Citrullus lanatus (Thunb.) Matsum. & Nakai, crops are continuously exposed to soilborne diseases. In many areas of the United States, greenhouse-raised watermelon seedlings are transplanted to the field to allow for early crop establishment and early fruit production. This practice can result in weakened root systems, which potentially make the plant prone to premature senescence and reduce crop productivity. Mycorrhizal fungi have been reported to improve plant growth in many crops through enhanced root growth and function. We hypothesized that amending potting mixes with commercial inocula of mycorrhizal fungi during seeding of watermelon in a greenhouse would improve watermelon production when seedlings were transplanted to the field. Colonization of watermelon roots with mycorrhizal fungi from three commercial formulations was compared with the colonization of onion roots to confirm the efficacy of the mycorrhizae. Two inocula of mycorrhizal fungi that resulted in colonization of watermelon roots were tested in the field and glasshouse for their potential to improve watermelon production. MycoApply improved early plant growth in two tests, one under Meloidogyne incognita-infested conditions in loamy sand and another at two phosphorus fertilizer levels (0 or 22 kg·ha−1 P) in a loam soil. Mycor Vam Mini plug improved early fruit yield in soil infested with M. incognita. Application of Myconate (formononetin), a potential enhancer of colonization with mycorrhizae, increased early fruit yield in M. incognita-infested soil. Myconate had positive effects when potting mixes were not amended with inoculum of mycorrhizal fungi, but reduced watermelon growth when mycorrhizal fungi were supplied in the potting mix. In glasshouse tests, inoculation with mycorrhizal fungi did not suppress disease. Mycorrhizal fungi inoculations improved early plant establishment and increased the most valuable early fruit yield under some environmental stress conditions but did not increase total fruit yields.

scholarly journals Use of Commercially Available Pollenizers for Optimizing Triploid Watermelon Production

HortScience ◽  
2010 ◽  
Vol 45 (4) ◽  
pp. 541-545 ◽  
Author(s):  
Peter J. Dittmar ◽  
David W. Monks ◽  
Jonathan R. Schultheis
Keyword(s):  
Citrullus Lanatus ◽  
Hollow Heart ◽  
Fruit Yield ◽  
The Other ◽  
Yield And Quality ◽  
Triploid Watermelon ◽  
Marketable Fruit ◽  
The Hill ◽  
Pollen Movement ◽  
Selection Of

An experiment was conducted during 2005 and 2006 in Kinston, NC, with the objective of maximizing triploid watermelon [Citrullus lanatus (Thunb.) Matsum. and Nak.] fruit yield and quality by optimizing the choice and use of pollenizers. Treatments were pollenizer cultivars planted singly [‘Companion’, ‘Super Pollenizer 1’ (‘SP1’), ‘Summer Flavor 800’ (‘SF800’), and ‘Mickylee’] or in pairs (‘Companion’ + ‘SP1’, ‘Companion’ + ‘SF800’, and ‘SP1’ + ‘SF800’). All pollenizers from these seven treatments were interplanted with the triploid cultivar Tri-X-313. Planting arrangement was compared by establishing ‘SF800’ in a hill versus an interplanted field arrangement. Effect of pollenizer establishment timing on triploid fruit yields and quality was evaluated by establishing ‘SP1’ 3 weeks after planting and comparing it with the establishment of ‘SP1’ at the time of triploid plant establishment. Finally, a triploid planting with no pollenizer (control) was included to determine pollen movement. Fruit yield from the control was 22% or less of yield of the other treatments containing a pollenizer and less than 10% in the initial or early harvests. Pollen movement was minimal among plots and differences in yield and fruit quality could be attributed to pollenizer treatment. In 2005, the use of ‘Companion’, ‘SP1’, or ‘Mickylee’ as pollenizers produced similar total yields, whereas ‘SF800’ produced the lowest yield. In 2005, ‘Companion’ produced more large fruit than the other individual pollenizer treatments. Combining the pollenizers generally did not enhance triploid yields or quality. Interplanting of pollenizers consistently resulted in greater yield compared with the hill system. Late planting of ‘SP1’ increased the incidence of hollow heart in the marketable fruit and decreased yield compared with simultaneously planting ‘SP1’ and triploid plants. Thus, selection of pollenizer, planting arrangement, and time of pollenizer establishment are all important considerations to optimizing triploid yield and quality.

scholarly journals Impact of Grafting on Watermelon Growth, Fruit Yield and Quality

2012 ◽  
Vol 76 (1) ◽  
pp. 99-118 ◽  
Author(s):  
Fouad Mohamed ◽  
Khalid El-Hamed ◽  
Mohammed Elwan ◽  
Mennat-Allah Hussien
Keyword(s):  
Crop Production ◽  
Citrullus Lanatus ◽  
Abiotic Stress Tolerance ◽  
Fruit Yield ◽  
Soluble Solids ◽  
Crop Damage ◽  
Control Treatment ◽  
Yield And Quality ◽  
Male Flowers

Impact of Grafting on Watermelon Growth, Fruit Yield and QualityGrafting is an alternative approach to reduce crop damage resulting from soil-borne pathogens and increases plant abiotic stress tolerance, which in turn increases crop production. The purpose of this study was to determine whether grafting could improve plant growth and fruit quality of watermelon through monitoring the changes induced by different rootstock-scion combinations. Watermelon (Citrullus lanatus) cv. Aswan F1was grafted into five rootstocks (Nun 6001 F1, Strongtosa F1, Tetsukabuto F1, Ferro F1and Shintoza F1) hybrids betweenCucurbita maximaandCucurbita moschata.Highest vegetative growth and fruit yield were obtained by ‘Nun 6001 F1’ as a rootstock using the tongue approach method. Grafting reduced significantly sex ratio by reducing the number of male flowers. Grafting increased significantly lycopene content in fruit flesh by 57% over the control treatment, but did not affect soluble solids content (SSC). One third of the control non-grafted plants died andFusarium oxysporumwas isolated as the responsible pathogen. These results indicate that grafting watermelon onto specific rootstock influences growth, productivity, and quality of the fruit as well as disease resistance. Grafting can be suggested as an alternative method to control ofFusariumwilt in watermelon production.

FEMALE CERATITIS CAPITATA (DIPTERA: TEPHRITIDAE) CAPTURE IN A DRY TRAP BAITED WITH A FOOD-BASED SYNTHETIC ATTRACTANT IN AN ARGAN FOREST IN MOROCCO. PART I: LOW POPULATION FIELD TEST

1998 ◽  
Vol 130 (3) ◽  
pp. 349-356 ◽  
Author(s):  
A. Bakri ◽  
H. Hadis ◽  
N.D. Epsky ◽  
R.R. Heath ◽  
J. Hendrichs
Keyword(s):  
Field Test ◽  
Field Trial ◽  
Ceratitis Capitata ◽  
Field Tests ◽  
Fruit Fly ◽  
Mediterranean Fruit Fly ◽  
Baited Traps ◽  
Synthetic Attractant ◽  
The Mediterranean

AbstractField tests were conducted in an argan forest in Morocco to evaluate the performance of a cylindrical dry trap and food-based synthetic attractant (FA) for monitoring the Mediterranean fruit fly (medfly), Ceratitis capitata (Weidemann). This female-targeted trapping system was compared with Jackson traps baited with trimedlure (TML), a male-targeted trapping system. TML-baited traps attracted significantly more males than FA-baited traps (91.4 ± 13.01 and 5.0 ± 0.75 males, respectively), and the FA-baited traps captured significantly more females than did TML-baited traps (9.3 ± 1.93 and 0.1 ± 0.04 females, respectively). For the first month of the field trial, the ratio of mature females to immature females captured in the FA-baited traps was approximately equal, but more immature females were captured in the second month. FA-baited traps were less specific and captured significantly more nontarget flies than did TML-baited traps.

Sign in / Sign up

Export Citation Format

Share Document