scholarly journals Novel management strategy to minimize the growing threat of fruit rot and powdery mildew diseases of chilli (Capsicum annuum) in India

2020 ◽  
Vol 9 (6) ◽  
pp. 2250-2255
Author(s):  
Abdul Kareem M ◽  
TB Allolli ◽  
Krishna Kurubetta ◽  
PS Ajjapalavar ◽  
MH Tatagar ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Capsicum Annuum ◽  
Management Strategy ◽  
Fruit Rot

scholarly journals A Short-Read Genome Assembly Resource for Leveillula taurica Causing Powdery Mildew Disease of Sweet Pepper (Capsicum annuum)

2020 ◽  
Vol 33 (6) ◽  
pp. 782-786
Author(s):  
Stefan Kusch ◽  
Márk Z. Németh ◽  
Niloofar Vaghefi ◽  
Heba M. M. Ibrahim ◽  
Ralph Panstruga ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Capsicum Annuum ◽  
Genome Assembly ◽  
Reference Genome ◽  
Gc Content ◽  
Sweet Pepper ◽  
Mesophyll Cells ◽  
Short Read ◽  
Leveillula Taurica ◽  
Reference Genome Assembly

Powdery mildew of sweet pepper (Capsicum annuum) is an economically important disease. It is caused by Leveillula taurica, an obligate biotrophic ascomycete with a partly endophytic mycelium and haustoria, i.e., feeding structures formed in the mesophyll cells of infected host plant tissues. The molecular basis of its pathogenesis is largely unknown because genomic resources only exist for epiphytically growing powdery mildew fungi with haustoria formed exclusively in epidermal cells of their plant hosts. Here, we present the first reference genome assembly for an isolate of L. taurica isolated from sweet pepper in Hungary. The short read–based assembly consists of 23,599 contigs with a total length of 187.2 Mbp; the scaffold N50 is 13,899 kbp and N90 is 3,522 kbp; and the average GC content is 39.2%. We detected at least 92,881 transposable elements covering 55.5 Mbp (30.4%). BRAKER predicted 19,751 protein-coding gene models in this assembly. Our reference genome assembly of L. taurica is the first resource to study the molecular pathogenesis and evolution of a powdery mildew fungus with a partly endophytic lifestyle.

Integrated Management of Die-Back and Fruit Rot of Chilli (Capsicum annuum L.)

2016 ◽  
Vol 29 (3) ◽  
pp. 179 ◽  
Author(s):  
Santoshreddy Machenahalli ◽  
VB Nargund ◽  
AS Byadgi ◽  
Yashoda Hegde
Keyword(s):  
Capsicum Annuum ◽  
Integrated Management ◽  
Fruit Rot ◽  
Capsicum Annuum L

scholarly journals Fungicide evaluation for control of powdery mildew, Leveillula taurica (Lev.) Arn., of peppers in Puerto Rico

1969 ◽  
Vol 75 (2) ◽  
pp. 119-123
Author(s):  
José A. Negrón ◽  
Rocío Rodríguez ◽  
Lucas Avilés
Keyword(s):  
Puerto Rico ◽  
Powdery Mildew ◽  
Capsicum Annuum ◽  
Disease Incidence ◽  
Causal Agent ◽  
Field Conditions ◽  
Copper Hydroxide ◽  
Leveillula Taurica

The effectiveness of benomyl, chlorothalonil, copper hydroxide, dinocap, sulfur and triadimefon for the control of the fungus Leveillula taurica, causal agent of the powdery mildew of peppers (Capsicum annuum), was evaluated under field conditions. Results from two experiments indicate that weekly applications of benomyl and triadimefon reduced disease incidence and increased pepper yield. In the first experiment, plots treated with triadimefon (0.35 L/ha) and benomyl (0.55 kg/ha) produced 20.2 and 17.2 kg fruit/plot, respectively, whereas the nontreated plots yielded 13,9 kg/plot. A similar trend but with higher yields was obtained in the second experiment. Treatments with triadimefon (0.70 L/ha) and benomyl (0.55 kg/ha) produced 41.0 and 41.3 kg of fruit/plot, respectively, as compared with the control treatments which yielded 29.0 kg/plot.

scholarly journals The Use of Red Shade Nets Improves Growth in Salinized Pepper (Capsicum annuum L.) Plants by Regulating Their Ion Homeostasis and Hormone Balance

Agronomy ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1766
Author(s):  
Amparo Gálvez ◽  
Alfonso Albacete ◽  
Francisco M. del Amor ◽  
Josefa López-Marín
Keyword(s):  
Capsicum Annuum ◽  
Salinity Stress ◽  
Management Strategy ◽  
Shoot Growth ◽  
Ion Homeostasis ◽  
Capsicum Annuum L ◽  
Efficient Management ◽  
Hormonal Balance ◽  
Microclimate Conditions ◽  
Pepper Plants

The actual climate crisis scenario is aggravating the abiotic stress episodes that crop plants have to face. Salinity is one of the most important abiotic stresses directly impairing plant growth and productivity. Several strategies have been developed to minimize the negative effects of salinity in agricultural industry, mainly at the plant level, while management strategies, such us the control of microclimate conditions and light quality over plant canopy, have also been used. Indeed, shading plants with photoselective nets has been considered an efficient management strategy to modulate solar radiation to improve crop productivity. The aim of this work was to gain insights about the physiological factors underlying the salinity-alleviating effect of using red shading nets. For that, pepper plants (Capsicum annuum L.) were grown under control (0 mM NaCl) and moderate salinity (35 mM NaCl) conditions, with half of the plants covered with a red net (30% shading). The shoot growth impairment provoked by salinity was in part minimized by shading plants with red nets, which can be explained by their higher capacity to exclude Na+, control of K+ homeostasis and regulation of hormonal balance. Indeed, the concentrations of the most active cytokinin in pepper, trans-zeatin, as well as its metabolic precursor, zeatin riboside, increased in shaded plants, associated to shoot growth recovery and photosynthetic rate maintenance under salinity. Furthermore, the stress-related hormone abscisic acid (ABA) increased with salinity but in a lower extend in the plants shaded with red nets, suggesting a fine tune of stomata opening by ABA which, in crosstalk with salicylic acid increment, improved plant water relations. Likewise, the concentrations of gibberellins and the ethylene precursor, 1-aminocyclopropane-1-carboxylic acid, also changed during salinity stress in shaded plants but those changes were uncoupled of growth responses as indicated by the principal component analysis and thus they seem to play a minor role. Our data demonstrate that shading pepper plants with red nets is an efficient management strategy to modulate microclimate conditions at crop level thus controlling the ion homeostasis and hormonal balance of the plant to cope with salinity stress. This is especially important due to the actual and expected changes of the global climatic conditions.

scholarly journals Efficacy of fungicides and organic oils to control powdery mildew disease of jujube (Ziziphus mauritiana Lam.)

2014 ◽  
Vol 38 (4) ◽  
pp. 659-672 ◽  
Author(s):  
MZ Hoque ◽  
AM Akanda ◽  
MIH Mian ◽  
MKA Bhuiyan
Keyword(s):  
Powdery Mildew ◽  
Foliar Spray ◽  
Severity Index ◽  
Fruit Yield ◽  
Fruit Rot ◽  
Control Treatment ◽  
Mustard Oil ◽  
Ziziphus Mauritiana ◽  
Powdery Mildew Disease ◽  
Indian Jujube

Powdery mildew (Oidium erysiphoides f.sp. ziziphi) is the major disease of Indian jujube (Ziziphus mauritiana) in Bangladesh. An experiment was conducted to test the efficacy of six fungicides, two organic oils, and a detergent against the disease. Tested fungicides were Tilt (Propiconazole) @ 0.05%, Folicur (Hexaconazole) @ 0.1%, Bavistin DF (Carbandazim) @ 0.2%, Dithane M-45 (Mancozeb) @ 0.3%, Thiovit 80 WG (Sulpher) @ 0.3%, and Cupravit (Copper) @ 0.3%, the oils were Mustard oil @ 0.5% and Neem oil 0.5%, and the Detergent (Trix) @ 0.5%. The materials were applied as foliar spray for seven times at an interval of 15 days. All of the fungicides and two oils gave significant decrease in severity of powdery mildew and increased fruit yield of Indian jujube irrespective of varieties, locations and over times. Among the treatments, Folicur, Tilt, Thiovit, and Dithane M-45 sprays were found effective than others. The severity index values on two jujube varieties were 3.89-4.50 at Mowna and 4.00-4.53 at Ishurdi in control treatment. The severity indices were reduced to 1.45-1.96 at Mowna and 1.33-2.07 at Ishurdi due to application of Tilt, Folicur, Thiovit, and Dithane M-45, which gave increase in fruit yield over control by 68.88, 63.69, 63.04, and 54.63% in Apple Kul and 83.25, 77.87, 77.39, and 70.36% in BAU Kul, respectively. Most of the treatments were able to reduce number of spotted fruits. The best effective fungicide was found to be Tilt followed by Folicur and Thiovit in reducing disease severity of powdery mildew as well as other fruit diseases like fruit spot and fruit rot and increase fruit yield of Indian jujube. Therefore, Tilt/Folicur may be recommended for jujube growers to control the powdery mildew disease in commercial orchard. DOI: http://dx.doi.org/10.3329/bjar.v38i4.19032 Bangladesh J. Agril. Res. 38(4): 659-672, December 2013

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