Drip fertigation with nitrogen and potassium and postharvest susceptibility to bacterial soft rot of bell peppers

Carballo, S.; Blankenship, Sylvia M.; Sanders, Douglas C.; Ritchie, D. F.

doi:10.1080/01904169409364797

Cited by 16 publications

(5 citation statements)

References 12 publications

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“…Siddiqi et al 20 also pointed out that reduction of macronutrient concentrations to 50 or 25% of the control levels had no adverse effect on fruit yield, highlighting the enormous buffer capacity of plants to store nitrogen. The lack of yield response to an additional fertilization is consistent with other studies which found that pepper requires low N fertilization rates for near-maximum production 21,22 . The integrated treatment (half the fertilizer dosage of the conventional treatment) showed the highest amounts of the extra and first-class fruit categories but no differences between treatments were observed for the second, third and the non-commercial fruits.…”

Section: Resultssupporting

confidence: 91%

Yield and fruit quality response of sweet pepper to organic and mineral fertilization

Amor

2007

Renew. Agric. Food Syst.

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Sweet pepper plants were grown in a greenhouse under three different cultivation methods (organic, integrated and conventional farming). During the crop cycle, plant growth and especially yield and fruit quality parameters were monitored to determine the effects of the different fertilization strategies. Plant fresh weight and total leaf fresh weight were progressively reduced, relative to the other treatments, in the organic treatment compared with the conventional, and at the end of the crop cycle these parameters were reduced by 32.6 and 35% respectively. This reduction in growth was directly correlated with plant nitrate concentration and, at the end of the study, nitrate concentration was reduced almost completely in the organic treatment. Despite the important effect on growth, no significant differences in total marketable yield were observed between conventional and organic farming, although integrated farming showed the highest yield in the extra and first class fruit categories. Organic farming increased antioxidant activity but reduced both chlorophylls and b-carotene. Fruit firmness, pericarp thickness, pH and total soluble solids content showed higher values with the organic method, but these differences were not significant with respect to the conventional method. Our results show the advantages of the organic fertilization, from both environmental and economic perspectives, if proper dosage is added to the crop and the demonstrated buffer capacity of these plants, with respect to maintaining yield under nutrient depletion at later stages of development, is taken into account.

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Section: Resultssupporting

confidence: 91%

Yield and fruit quality response of sweet pepper to organic and mineral fertilization

Amor

2007

Renew. Agric. Food Syst.

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“…The lack of a positive yield response to increasing N fertigation from 31.5 to 63 kg·ha -1 N is consistent with several other studies that found peppers require low N fertilization rates for near maximum production (Carballo et al, 1994;Clark and Stanley, 1998;Hartz et al, 1993;Locascio and Stall, 1994;Madramootoo and Rigby, 1991;O'Sullivan, 1979;Qawasmi et al, 1999;Russo, 1991;Thomas and Heilman, 1964;Wiedenfeld, 1979). However, it is unclear why staked plants were more productive when fertigated with the lower N rate.…”

Section: Resultssupporting

confidence: 88%

Response of Plasticultured Bell Pepper to Staking, Irrigation Frequency, and Fertigated Nitrogen Rate

Bowen¹,

Frey²

2002

HortSci

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Effects of staking, drip irrigation frequency and fertigated N rate on dry matter partitioning and yield of bell peppers (Capsicum annuum L.), grown using polyethylene mulch and mini-tunnels, were determined in two years. In the second year, which had higher early-season temperatures and more hours of direct sunlight, plants were larger, more productive and had larger fruit with thicker pericarps and a higher water content than in the first year. In both years, staked plants fertigated with 31.5 vs. 63 kg·ha-1 N produced higher yields due to increased fruit size and pericarp thickness. Compared with the response to monthly irrigation plus rainfall, additional irrigation applied when the soil moisture tension averaged below -25 and -20 kPa in the two years, respectively, affected yield only in the second year when it increased yield and the number of fruits produced by staked plants and decreased that of non-staked plants. Patterns of vegetative development and dry matter partitioning indicate that resources were remobilized from leaves to support fruit development.

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“…From the disease triangle, it is evident that provision of suitable crop environment (that is, through fertilization) is unlikely to eliminate the development of Xanthomonas wilt, especially when other conditions such as host susceptibility and pathogen virulence are conducive for infection (Agrios, 2005). Some authors have suggested that effectiveness of fertilizer for disease management depends essentially on the attacking pathogen (Büschbell and Hoffmann, 1992;Carballo et al, 1994). Our study produced evidence of the overriding effect of inoculum concentration on the effectiveness of fertilizers for Xanthomonas wilt control.…”

Section: Discussionsupporting

confidence: 58%

Interactive effects of fertilizer and inoculum concentration on subsequent development of xanthomonas wilt in banana

Ochola¹,

Ocimati²,

Tinzaara³

et al. 2014

Afr. J. Agric. Res.

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Soil nutrient depletion and Xanthomonas wilt (Xanthomonas campestris pv. musacearum) are major causes of declining productivity in smallholder banana systems in East and Central Africa. This study examined the interactive effect of fertilizer and inoculum concentration on development of Xanthomonas wilt. Fertilization significantly (p<0.01) increased the plant height, plant girth and leaf area in banana compared to control without fertilizer. Despite this, between 9 and 21 days post inoculation (dpi) all inoculated plants had exhibited typical disease symptoms (that is, chlorosis, necrosis and wilting of leaves). No significant reduction (p>0.05) in disease incidence, wilt severity index or mortality could be associated with increasing fertilizer amounts. Interestingly, there was a highly significant (p<0.01) overriding effect of inoculum concentration on the ability of fertilizer to reduce wilt severity index and mortality in banana. Plants inoculated with 10 6 to 10 12 cfu mL-1 developed twice as much disease compared to 10 4 cfu mL-1 inoculations. Average mortality of 9.2% for 10 4 cfu mL-1 inoculated plants provides evidence of the potential to cause latent infections. Low bacterial loads are implicated in recent field resurgence of Xanthomonas wilt in banana orchards where disease had been successfully contained.

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Drip fertigation with nitrogen and potassium and postharvest susceptibility to bacterial soft rot of bell peppers

Cited by 16 publications

References 12 publications

Yield and fruit quality response of sweet pepper to organic and mineral fertilization

Yield and fruit quality response of sweet pepper to organic and mineral fertilization

Response of Plasticultured Bell Pepper to Staking, Irrigation Frequency, and Fertigated Nitrogen Rate

Interactive effects of fertilizer and inoculum concentration on subsequent development of xanthomonas wilt in banana

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