Effects of foliar application of potassium nitrate on suppression of Alternaria leaf blight of cotton (<i>Gossypium hirsutum</i>) in northern Australia

Bhuiyan, Shamsul A.; Boyd, Maury; Dougall, A; Martin, Caleb D.; Hearnden, Mark

doi:10.1071/ap07051

Cited by 12 publications

(10 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The beneficial effect of K was most obvious for fungal and bacterial diseases where 70 and 69% of the studies reported a decrease in disease incidence (Amtmann et al 2008). KNO 3 significantly reduced the severity of Alternaria leaf blight of cotton (Gossypium hirsutum) at the middle canopy level (Bhuiyan et al 2007). Aggregate sheath spot (AgSS) severity of rice decreased with increasing N and K fertilizer rates and leaf N and K concentrations at particle initiation (Williams and Smith 2001;Linquist et al 2008).…”

Section: Effects Of N-k Interaction On Quality and Stress Tolerance Omentioning

confidence: 97%

Potassium nutrition of crops under varied regimes of nitrogen supply

et al. 2010

View full text Add to dashboard Cite

Nitrogen (N) over-application is a serious problem in intensive agricultural production areas with consequent large N losses and environmental pollution. In contrast to N, potassium (K) application has been neglected in many developing countries and this has resulted in soil K depletion in agricultural ecosystems and prevented increases in crop yields. Nitrogenpotassium interaction is currently a topic of interest in many studies and the focus of this review is K nutrition under varied N regimes. Nitrogen form and application rate and time influence soil K fixation and release, as well as K uptake, transport, cycling and reutilization within crops. High yielding quality crops can be obtained by optimal N: K nutritional ratios. High rates of applications of N and K do not necessarily lead to increased yield increments and may even reduce yield. Yield response to K uptake depends on N nutritional status and the interaction is usually positive when NO 3 − -N is supplied. Antagonism between NH 4 + and K + in uptake was mostly attributed to simple competitive effects in the past while evidence showing mixednoncompetitive interactions existed. Two components of membrane transport systems for K uptake by plants are a high-affinity K + transport system which is inhibited by NH 4 + and a low-affinity K + transport system which is relatively NH 4 + insensitive. Potassium is highly mobile within plants but its flow and partitioning can change depending on the forms of N supply. NH 4 + nutrition in comparison to NO 3 − -supply results in more K translocation to leaves. A better understanding of the mechanism of N-K interaction can be a useful guide to best nutrient management in agricultural practice in order to achieve high yields with high nutrient use efficiency.

show abstract

Section: Effects Of N-k Interaction On Quality and Stress Tolerance Omentioning

confidence: 97%

Potassium nutrition of crops under varied regimes of nitrogen supply

et al. 2010

View full text Add to dashboard Cite

show abstract

“…was confirmed as the most prevalent disease of cotton in northern Australia. This contrasts with southern Australia where it is minor disease (Bhuiyan et al 2007a(Bhuiyan et al , 2007b. The severity of the disease was greatest at Katherine, where a combination of cold night temperatures, dew during flowering, low K soils and overhead irrigation appeared to favour the disease.…”

Section: Diseasesmentioning

confidence: 88%

“…The severity of the disease was greatest at Katherine, where a combination of cold night temperatures, dew during flowering, low K soils and overhead irrigation appeared to favour the disease. Surveys of crops found up to 100% of leaves were infected (Bhuiyan et al 2007a(Bhuiyan et al , 2007b. Experiments were initiated at Katherine in 2004 and 2005.…”

Section: Diseasesmentioning

confidence: 99%

See 1 more Smart Citation

Can sustainable cotton production systems be developed for tropical northern Australia?

Yeates

Strickland²,

Grundy³

2013

Crop Pasture Sci.

View full text Add to dashboard Cite

This article reviews research coordinated by the Australian Cotton Cooperative Research Centre (CRC) that investigated production issues for irrigated cotton at five targeted sites in tropical northern Australia, north of 21°S from Broome in Western Australia to the Burdekin in Queensland. The biotic and abiotic issues for cotton production were investigated with the aim of defining the potential limitations and, where appropriate, building a sustainable technical foundation for a future industry if it were to follow. Key lessons from the Cotton CRC research effort were: (1) limitations thought to be associated with cotton production in northern Australia can be overcome by developing a deep understanding of biotic and environmental constraints, then tailoring and validating production practices; and (2) transplanting of southern farming practices without consideration of local pest, soil and climatic factors is unlikely to succeed. Two grower guides were published which synthesised the research for new growers into a rational blueprint for sustainable cotton production in each region. In addition to crop production and environmental impact issues, the project identified the following as key elements needed to establish new cropping regions in tropical Australia: rigorous quantification of suitable land and sustainable water yields; support from governments; a long-term funding model for locally based research; the inclusion of traditional owners; and development of human capacity.

show abstract

“…K was also associated with increased leaf activity of the phenylalanine ammonia-lyase and increased disease resistance [ 48 ]. The addition of K to a low-nitrate fertilizer reduced cucumber fruit gray mold ( B. cinerea ) and stem infections [ 49 ]. In addition, foliar-applied KNO 3 reduced the incidence and severity of cotton Alternaria leaf blight ( Alternaria macrospora and A. alternata ) [ 49 ].…”

Section: Discussionmentioning

confidence: 99%

Nutrient Status of Cucumber Plants Affects Powdery Mildew (Podosphaera xanthii)

Elad

Barnea

Rav‐David

et al. 2021

Plants

View full text Add to dashboard Cite

We examined the effects of applications of N, P, K, Mg, and Ca through an irrigation solution and spraying K, Ca, and Mg salts on cucumber powdery mildew (CPM, Podosphaera xanthii) in potted plants and under commercial-like conditions. Spraying CaCl2 and MgCl2, or KCl and K2SO4, decreased CPM. There were significant negative correlations between the anion-related molar concentrations of the salts and disease severity. Among the sprayed treatments, NaCl provided significantly less CPM control when applied at a low (0.05 M) concentration, as compared with CaCl2 and MgCl2. When sprayed applications of Mg and K salts were analyzed separately from the untreated control, the Cl− salts were found to be more effective than the SO4−2 salts. High N and Mg concentrations in the irrigation water delivered to young, fruit-less cucumber plants reduced CPM, whereas more CPM was observed when the irrigation solution contained a medium amount of P and a high amount of K. In contrast, mature, fruit-bearing plants had less severe CPM at higher N, lower P, and higher K levels. Spraying mature plants with monopotassium phosphate, polyhalite (K2Ca2Mg(SO4)4·2H2O), and the salts mentioned above over an entire growing season suppressed CPM. CPM severity was also reduced by spray applications of Ca, Mg, and KSO4−2 and Cl− salts. Spray applications provided better CPM control than fertigation treatments. Induced resistance is probably involved in the effects of nutrients on CPM.

show abstract

Effects of foliar application of potassium nitrate on suppression of Alternaria leaf blight of cotton (Gossypium hirsutum) in northern Australia

Cited by 12 publications

References 10 publications

Potassium nutrition of crops under varied regimes of nitrogen supply

Potassium nutrition of crops under varied regimes of nitrogen supply

Can sustainable cotton production systems be developed for tropical northern Australia?

Nutrient Status of Cucumber Plants Affects Powdery Mildew (Podosphaera xanthii)

Contact Info

Product

Resources

About