Effect of Leaf Removal on the Growth And Yield of Okra (Abelmoschus Esculentus) and its Relevance to Leaf Harvesting Patterns and Pest Damage

1988 ◽  
Vol 24 (4) ◽  
pp. 449-455 ◽  
Author(s):  
F. O. Olasantan
Keyword(s):  
Yield Loss ◽  
Economic Loss ◽  
Abelmoschus Esculentus ◽  
Growth And Yield ◽  
Insect Damage ◽  
Leaf Removal ◽  
Fresh Leaf ◽  
Pest Damage ◽  
Young Leaves ◽  
Marketable Fruit

SummaryExperiments on okra to determine the economic loss caused by insect damage to the leaves or by harvesting young leaves as a vegetable are described. Leaf harvests at 1-weekly intervals yielded 30-50% more fresh leaf than harvests at 2 or 3-weekly intervals. Removing a quarter of each leaf or single leaves from the upper or lower parts of the plant at 3-weekly intervals did not affect marketable fruit yield, but yield was reduced by about 30% when one young leaf was harvested at 1 or 2-weekly intervals or when two or three leaves were harvested at S-weekly intervals. Removing more than one quarter of each leaf or two or three fully expanded leaves from the lower three-quarters of the plant at 3-weekly intervals also caused up to 40% yield loss.Harvesting single leaves at S-weekly intervals is therefore recommended if okra is to be grown for both leaves and pods. The plant can tolerate at least 25% defoliation, as can happen with insect damage, before any yield loss occurs.F. O. Olasantan: Efecto de la deshojadura sobre el crecimiento y rendimiento del gombo (Abelmoschus esculentus,) y su importancia para modelos de cosecha de hojas y dano causado porplagas.

scholarly journals Pre-harvest field application of enhanced freshness formulation reduces yield loss in orange

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Jaspa Samwel ◽  
Theodosy Msogoya ◽  
Abdul Kudra ◽  
Hosea Dunstan Mtui ◽  
Anna Baltazari ◽  
...  
Keyword(s):  
Yield Loss ◽  
Sweet Orange ◽  
New Technology ◽  
Significant Negative Correlation ◽  
Field Application ◽  
Yield Losses ◽  
Factorial Experiments ◽  
Marketable Yield ◽  
Pest Damage ◽  
Marketable Fruit

Abstract Background Orange (Citrus sinensis L.) production in Tanzania is constrained by several pre-harvest factors that include pests. Hexanal, sprayed as Enhanced Freshness Formulation (EFF) is a relatively new technology that has been reported to reduce pre-harvest loss in fruits. However, the effects of hexanal on pre-harvest yield loss of orange are not known. We studied the effects of hexanal as EFF on yield losses of three sweet orange cultivars namely, Early Valencia, Jaffa, and Late Valencia. Factorial experiments tested the effects of EFF concentration, variety, and time of EFF application on number of dropped fruit, percentage of non-marketable fruit and incidence of pest damage. Results Results showed significant negative correlation (p < 0.001) between EFF and the percentage of dropped fruit, non-marketable yield, and incidence of pest damage. An increase in hexanal concentration by 1%, is expected to reduce number of dropped fruit by 50, percentage of non-marketable by 35.6, and incidences of pest damage by 36.5% keeping other factors constant. Results also show significant association (p < 0.001) between time of hexanal application and non-marketable yield. Percentage of dropped fruit is expected to increase by 1 for each day away from harvest, keeping other factors constant. Conclusion Pre-harvest application of hexanal as EFF can significantly reduce number of dropped fruits, percentage of non-marketable fruit and incidence of pest damage.

Effect of pruning on growth, leaf yield and pod yields of okra (Abelmoschus esculentus(L.) Moench)

2007 ◽  
Vol 146 (1) ◽  
pp. 93-102 ◽  
Author(s):  
F. O. OLASANTAN ◽  
A. W. SALAU
Keyword(s):  
Market Price ◽  
Dry Weight ◽  
Abelmoschus Esculentus ◽  
Early Maturity ◽  
Fresh Leaf ◽  
Pod Yield ◽  
Shoot Dry Weight ◽  
Apical Bud ◽  
Leaf Yield ◽  
Young Leaves

SUMMARYYoung leaves and pods of okra (Abelmoschus esculentus(L.) Moench) are edible, and so a crop management strategy for removing edible leaves while sustaining good pod yields is required. Pruning treatments were imposed on apically debudded okra plants for 3 years to assess effects of removing a quarter, half or three-quarters of the primary branches on growth and fresh leaf and pod yields. Pruning significantly (P<0·05) delayed fruiting by 8–10 days, extended length of harvest duration by 12–15 days and increased number of pods/plant by 10–40% and pod yield by 9–36% more than the control plants which had neither apical bud removal nor pruning. However, no difference in pod weight or pod length was found between these treatments and the control. Three-quarters pruning significantly (P<0·05) increased fresh leaf yield by 29–49%, but not all the leaves were desirable for consumption because of high fibre content. Decreases were seen in the numbers of secondary branches, shoot dry weight and pod yields (by 40–57, 22–36 and 22–30%, respectively, more than a quarter or half pruning). Although early production of pods in the control plants is often important for early maturity and high market prices, the present study found that a delay in fruiting, an extension in length of harvest duration and an increase in pod yield in plants with a quarter or half pruning enhanced staggered production and maximal pod yield. This helps to ensure a better market price and to enable growers avoid a glut on the market. A direct promotional effect of pruning on pod yields provides a possible strategy for growing okra for both leaf and pod harvests. A quarter or half pruning from the upper parts of the main stems of apically debudded plants to ensure good production and quality of leaves and pods is therefore recommended if okra is to be grown for both leaf and pod yields.

Undamaged cotton plants yield more if their neighbour is damaged: implications for pest management

2009 ◽  
Vol 99 (5) ◽  
pp. 467-478 ◽  
Author(s):  
L.J. Wilson ◽  
T.T. Lei ◽  
V.O. Sadras ◽  
L.T. Wilson ◽  
S.C. Heimoana
Keyword(s):  
Yield Loss ◽  
Growth Dynamics ◽  
Growth And Yield ◽  
Plant Interactions ◽  
Damage Distribution ◽  
Pest Damage ◽  
Cotton Plants ◽  
Allocation Patterns ◽  
Plant Level ◽  
Better Than

AbstractUnderstanding the compensatory responses of crops to pest damage is important in developing pest thresholds. Compensation for pest damage in crops can occur at the plant level, where the architecture, growth dynamics and allocation patterns of damaged plants are altered, allowing them to recover or, at the crop level, where differential damage between plants may alter plant-to-plant interactions. We investigated growth and yield of cotton (Gossypium hirsutum L.) following non-uniform manual defoliation of seedlings. This partially replicates real pest damage and is valuable in understanding crop-level responses to damage because it can be inflicted precisely. Damage distributions included damaging 0, 25, 50, 75 or 100% of the plants. Damage intensity for the damaged plants was varied by removing 100 or 75% of each true leaf when plants had two, four and six true leaves. At the crop level, yield loss increased as the proportion of plants damaged and intensity of damage per damaged plant increased. Neighbour interactions occurred; undamaged plants with damaged neighbours grew larger and yielded better than undamaged plants with undamaged neighbours, while the converse applied for damaged plants with undamaged neighbours. Neighbour interactions were influenced by the intensity of damage and were stronger when 100% of the leaf area was removed than when 75% was removed. At the crop level, when compared with yield estimates based on yield of plants from uniformly damaged or undamaged plots, these interactions resulted in higher yield than expected (+8%). This suggests that damage distribution may have to be considered in studies where artificial or real pest damage is inflicted uniformly on plants.

Growth and yield of okra (Abelmoschus esculentus (L.) Moench) grown in the marginal upland area of Sta. Rita, Samar as influenced by different planting densities and mulching materials

2017 ◽  
pp. 44-54
Author(s):  
Zenaida Gonzaga ◽  
Warren Obeda ◽  
Ana Linda Gorme ◽  
Jessie Rom ◽  
Oscar Abrantes ◽  
...  
Keyword(s):  
Bare Soil ◽  
Abelmoschus Esculentus ◽  
Growth And Yield ◽  
Planting Density ◽  
Rice Hull ◽  
Plastic Mulch ◽  
Lady’S Finger ◽  
Materials Used ◽  
Set Up ◽  
A Minor

Okra or Lady’s finger, botanically known as Abelmoschus esculentus (L.) Moench, is a tropical and sub-tropical indigenous vegetable crop commonly grown for its fibrous, slimy, and nutritious fruits and consumed by all classes of population. It has also several medicinal and economic values. Despite its many uses and potential value, its importance is under estimated, under-utilized, and considered a minor crop and little attention was paid to its improvement. The study was conducted to evaluate the effects of different planting densities and mulching materials on the growth and yield of okra grown in slightly sloping area in the marginal uplands in Sta. Rita, Samar, Philippines. A split-plot experiment was set up with planting density as main plot and the different mulching materials as the sub-plot which were: unmulched or bare soil, rice straw, rice hull, hagonoy and plastic mulch. Planting density did not significantly affect the growth and yield of okra. Regardless ofthe mulching materials used, mulched plants were taller and yielded higher compared to unmulched plants. Moreover, the use of plastic mulch resulted to the highest total fruit yield. The results indicate the potential of mulching in increasing yield and thus profitability of okra production under marginal upland conditions.

scholarly journals KETAHANAN BEBERAPA KULTIVAR CABAI TERHADAP CUCUMBER MOSAIC VIRUS DAN CHILLI VEINAL MOTTLE VIRUS

2012 ◽  
Vol 7 (2) ◽  
pp. 130-139
Author(s):  
Muhammad Taufik ◽  
Sri Hendrastuti Hidayat ◽  
Sriani Sujiprihati ◽  
Gede Suastika ◽  
Sientje Mandang Sumaraw
Keyword(s):  
Virus Infection ◽  
Cucumber Mosaic Virus ◽  
Mosaic Virus ◽  
Yield Loss ◽  
Disease Incidence ◽  
Growth And Yield ◽  
Mottle Virus ◽  
Tolerance Response ◽  
Chilli Veinal Mottle Virus ◽  
Das Elisa

Resistance Evaluation of Chillipepper Cultivars for Cucumber Mosaic Virus and Chilli Veinal Mottle Virus.  The use of resistance culivars is an important strategy for management of virus infection in chillipepper. A research was undergone to study the effect of single and mix infection of CMV and ChiVMV on the disease incidence and on the growth and yield of nine chillipepper cultivars, i.e. Cilibangi 4, Cilibangi 5, Cilibangi 6, Helem, Jatilaba, Tit Bulat, Tit Segitiga, Tit Super and Tampar. Mechanical inoculation was conducted to transmit the virus. Infection of the virus was then confirmed with DAS-ELISA.  In general, inoculated chillipepper cultivars developed similar symptoms, i.e. mosaic type for CMV and mottle type for ChiVMV.  More severe symptom was not always observed from mix infection of CMV and ChiVMV. Disease incidence occurred in the range of 16.67 – 86.0% and this caused 18.3 – 98.6% yield loss.  Based on symptom expression, ELISA result, and reduction on yield, it can be concluded that all chillipepper cultivars used in this study could not hold up the virus infection. However, several cultivars showed tolerance response :  Jatilaba, Tit Super, and Tampar for CMV; Cilibangi 4 for ChiVMV; Tit Super for mix infection; and Cilibangi 5 for CMV, ChiVMV, and mix infection.  Further evaluation and investigation involving different chillipepper cultivars should be conducted.

scholarly journals Effect of weed management practices on growth and yield of kharif okra (Abelmoschus esculentus (L.) Moench)

2020 ◽  
Vol 8 (4) ◽  
pp. 3995-4001
Author(s):  
Sadhana Kongala ◽  
Venkateswara Reddy ◽  
Veena Joshi ◽  
Madhavi Molluru ◽  
Ram Prakash
Keyword(s):  
Weed Management ◽  
Management Practices ◽  
Abelmoschus Esculentus ◽  
Growth And Yield

scholarly journals Nutrients Assimilation and Chlorophyll Contents for Different Grapevine Varieties in Calcareous Soils in the Somontano DO (Spain)

Beverages ◽  
2018 ◽  
Vol 4 (4) ◽  
pp. 90 ◽  
Author(s):  
José Casanova-Gascón ◽  
Pablo Martín-Ramos ◽  
Clara Martí-Dalmau ◽  
David Badía-Villas
Keyword(s):  
Chlorophyll Content ◽  
Fruit Set ◽  
Chlorophyll Concentration ◽  
Calcareous Soils ◽  
Pinot Noir ◽  
Growth And Yield ◽  
Cabernet Sauvignon ◽  
Chlorophyll Contents ◽  
Young Leaves ◽  
The Impact

Lime-induced chlorosis (LIC) is an important abiotic constraint affecting the growth and yield of grapevines growing in calcareous soils in the Mediterranean region, and the sensory properties of the produced wine. In the work presented herein, the impact of LIC on the nutritional status and chlorophyll content was assessed for eleven varieties and a clone (Merlot, Pinot Noir, Cabernet Sauvignon, Tempranillo, Parraleta, Moristel, Aglianico, Macabeo, Sauvignon, Chardonnay, and Riesling), grafted to the same rootstock (1103 Paulsen). Macro- and micronutrient contents were determined in the fruit set and veraison stages by petiole analyses, while chlorophyll content in young leaves was monitored by SPAD. Significant differences were detected amongst varieties for all nutrients (including Fe), and inverse relationships between Fe and P contents in the petiole and chlorophyll concentration in the young leaves were found. Regarding LIC resistance, the Fe and chlorophyll contents suggest that Cabernet Sauvignon, Tempranillo and Aglianico varieties would show the best performance, while Sauvignon would be the least tolerant.

scholarly journals Effect of hydrogel on the performance of aerobic rice sown under different techniques

2011 ◽  
Vol 57 (No. 7) ◽  
pp. 321-325 ◽  
Author(s):  
A. Rehman ◽  
R. Ahmad ◽  
M. Safdar
Keyword(s):  
Soil Moisture ◽  
Yield Components ◽  
Economic Loss ◽  
Growth And Yield ◽  
Aerobic Rice ◽  
Water Deficiency ◽  
Crop Water ◽  
Moisture Contents ◽  
Moisture Percentage ◽  
Germinated Seeds

Declining water is a great concern in production of rice, because rice is more sensitive to water deficiency which restricts normal rice growth resulting in enormous economic loss. A field experiment was conducted to study the effect of hydrogel in different sowing techniques of aerobic rice viz. flat, ridge, and bed sowing. Observations on soil moisture percentage before every irrigation, yield, and yield components of rice were recorded. Application of hydrogel improved soil moisture contents in all the three sowing techniques as compared to soil without hydrogel. More soil moisture contents met the crop water needs and increased the number of germinated seeds. As a consequence of more emergence and better stand establishment, the yield components were also improved increasing the yield of rice in hydrogel amended soil in all sowing techniques. However, sowing of rice on beds with hydrogel amendment was found the most effective; it not only improved the performance of aerobic rice but also enhanced growth and yield of aerobic rice more than other sowing techniques.

scholarly journals Effect of Fertilizer and Manures on Growth and Yield of Tulsi and Pudina Medicinal Plant

2015 ◽  
Vol 7 (2) ◽  
pp. 13-16
Author(s):  
KM Rahman ◽  
MA Sattar ◽  
GMM Rahman
Keyword(s):  
Medicinal Plant ◽  
Natural Resources ◽  
Yield Components ◽  
Environmental Science ◽  
Poultry Manure ◽  
Leaf Length ◽  
Growth And Yield ◽  
Fresh Leaf ◽  
Branch Plant ◽  
Npk Fertilizer

The experiment was carried out at the Field Laboratory, Department of Environmental Science, Bangladesh Agricultural University, Mymensingh during the period of March, 2012 to July, 2012 to evaluate the effect of fertilizer and manure on the growth and yield of Tulsi and Pudina. There were six treatments consisting of control (No fertilizer and manures), cowdung, poultry manure, cowdung+ NPK fertilizer, poultry manure+ NPK fertilizer and Mixed fertilizer. All the treatment significantly influenced most of the growth and yield components of Tulsi and Pudina. The plant height, No. of branch/plant, No. of leaf/plant, Leaf length, 1000- fresh leaf weight and fresh yield were highest where cowdung was applied. All the above parameters were lowest where no manures were applied (control). From these results it was clear that cowdung was the best for soil quality and growth and yield of Tulsi and Pudina medicinal plant.DOI: http://dx.doi.org/10.3329/jesnr.v7i2.22197 J. Environ. Sci. & Natural Resources, 7(2): 13-16 2014

Effects of Low-Dose Flumioxazin and Metribuzin Postemergence Applications on Soybean

2018 ◽  
Vol 33 (1) ◽  
pp. 87-94
Author(s):  
Daniel O. Stephenson ◽  
Todd A. Spivey ◽  
Michael A. Deliberto ◽  
David C. Blouin ◽  
Brandi C. Woolam ◽  
...  
Keyword(s):  
Growth Stage ◽  
Low Dose ◽  
Yield Loss ◽  
Economic Loss ◽  
Growth Stages ◽  
Post Injury ◽  
Width Reduction ◽  
The Impact

AbstractAll herbicides will move off-target to sensitive crops when not applied correctly. Therefore, low-dose applications of flumioxazin and metribuzin were evaluated in soybean at the unifoliate, V2, and V4 growth stages. Rates evaluated were 12.5%, 25%, and 50% of the labeled use rates of 72 and 316 g ai ha−1 of flumioxazin and metribuzin, respectively. Flumioxazin injury was characterized by necrosis and visible height and width reduction. Injury increased with rate 3 d after treatment (DAT), with unifoliate, V2, and V4 soybean injured 15% to 30%, 18% to 27%, and 5% to 8%, respectively. Unifoliate and V4 soybean were injured more than V4 soybean 3 to 14 DAT, but injury decreased to <5% by 42 DAT. Soybean yields in the flumioxazin study were 92% to 96% of the nontreated, resulting in a yield loss of 196 to 393 kg ha−1 and a revenue loss of 71 to 141 US$ ha−1. Metribuzin injury was primarily chlorosis with necrosis and a visible reduction in soybean height and width. Soybean at the V2 growth stage was injured 14% more than V4 soybean 3 DAT, regardless of metribuzin rate. Injury to V2 and V4 soybean was similar 14 DAT, with injury of 21% to 40% across rates. Soybean injury when treated at the V2 and V4 growth stages was 6% to 29% 42 DAT compared to unifoliate soybean at 0 to 17%. Soybean yields in the metribuzin study yields were 96% to 98% of the nontreated. However, a 2% to 4% reduction equates to a loss of 90 to 180 kg ha−1 and a revenue loss of 32 to 65 US$ ha−1. Unifoliate and V2 soybean are more sensitive to a low dose of flumioxazin POST, and V2 and V4 soybean are more sensitive to a low dose of metribuzin POST. Injury and the impact on soybean growth could potentially cause economic loss for a soybean producer.

Sign in / Sign up

Export Citation Format

Share Document