scholarly journals Leaf Disease Analysis using Smart System

The recognizable proof of infection on the plant is a vital key to keep a substantial loss of yield and the amount of horticultural item. The indications can be seen on the pieces of the plants, for example, leaf, stems, sores and natural products. The leaf demonstrates the indications by evolving shading, demonstrating the marks on it. This recognizable proof of the malady is finished by manual perception and pathogen discovery which can devour additional time and may demonstrate exorbitant. The point of the venture is to distinguish and group the infection precisely from the leaf pictures. The means required in the process are Preprocessing, Practicing and Identification. The sickness considered are Powdery Mildew, Downey Mildew which can make substantial misfortune paddy crop. For distinguishing proof of illness highlights of leaf, for example, real hub, minor pivot and so forth are separated from leaf and given to classifier for characterization.

2007 ◽  
pp. 251-257 ◽  
Author(s):  
G. Scarito ◽  
A. Salamone ◽  
G. Vito Zizzo ◽  
S. Agnello

2013 ◽  
Vol 43 (11) ◽  
pp. 1938-1944 ◽  
Author(s):  
Fabiano José Perina ◽  
Eduardo Alves ◽  
Ricardo Borges Pereira ◽  
Gilvaine Ciavareli Lucas ◽  
Claudia Regina Gontijo Labory ◽  
...  

This research aimed to evaluate the potential of essential oils (EOs) and cow's whole milk (CWM) in order to control soybean powdery mildew and to estimate the most effective concentrations of these natural products in reducing the disease severity on soybean plants. Three experiments were carried out: The first experiment evaluated and selected the most effective treatments to reduce the severity of soybean powdery mildew under greenhouse conditions; the second experiment evaluated the effect of CWM and EOs of citronella, lemongrass, eucalyptus, cinnamon and tea tree on the pathogen through the ultrastructure analysis of soybean leaflets infected by Erysiphe diffusa using the scanning electron microscope (SEM) and light microscope (LM) technology. In the third experiment, the most effective products were tested at several concentrations in order to define the most effective concentrations to reduce disease severity under greenhouse conditions. The treatments CWM (100mL L-1) and EOs of citronella, lemongrass and eucalyptus (1.0mL L-1), reduced the disease severity from 67 to 74%. Direct effects from all natural products tested on the structures of E. diffusa were demonstrated through the SEM and LM analysis. Concentrations at 1.5mL L-1 for EOs of citronella, lemongrass and eucalyptus and also at 180mL L-1 for the treatment CWM were the most effective against E. diffusa on soybean.


2020 ◽  
Vol 8 (2) ◽  
pp. 913-915
Author(s):  
Meera Choudhary ◽  
RP Ghasolia ◽  
Tejpal Bajaya ◽  
Manisha Shivran

2015 ◽  
Vol 8 (2) ◽  
pp. 295-298
Author(s):  
B.M. DINESH ◽  
SHRIPAD KULKARNI ◽  
S.I. HARLAPUR ◽  
V.I. BENAGI ◽  
C.P. MALLAPUR

1988 ◽  
Vol 28 (4) ◽  
pp. 529 ◽  
Author(s):  
TN Khan

Effect of stubble residues on leaf diseases and yield of barley (Hordeum vulgare L. cv. Dampier) were studied by adding small quantities of infested stubble to test plots grown on land where a non-barley crop or pasture had been grown in the previous year. Experiments conducted at 5 locations in 198 1 and 1982 showed that stubble residues increased leaf disease. The severity of leaf disease varied with location and year. High levels of scald (Rhynchosporium secalis) were recorded at all locations, but substantial levels of net blotch (Drechslera teres) occurred only at northern locations. Halo spot (Selenophoma donacis) and a leaf spot caused by Drechslera verticillata were either absent or occurred in minor proportions. The incidence of powdery mildew (Erysiphe graminis f.sp. hordei) at Mt Barker in 1982 was not related to the presence of stubble residues. Grain yield losses of 9 and 28% occurred in the stubble amended plots in 1981 and 1982, respectively. Reductions in number of heads and number of seeds per plot appeared to be the major components of yield loss.


Author(s):  
John S. Gardner ◽  
W. M. Hess

Powdery mildews are characterized by the appearance of spots or patches of a white to grayish, powdery, mildewy growth on plant tissues, entire leaves or other organs. Ervsiphe cichoracearum, the powdery mildew of cucurbits is among the most serious parasites, and the most common. The conidia are formed similar to the process described for Ervsiphe graminis by Cole and Samson. Theconidial chains mature basipetally from a short, conidiophore mother-cell at the base of the fertile hypha which arises holoblastically from the conidiophore. During early development it probably elongates by polar-tip growth like a vegetative hypha. A septum forms just above the conidiophore apex. Additional septa develop in acropetal succession. However, the conidia of E. cichoracearum are more doliform than condia from E. graminis. The purpose of these investigations was to use scanning electron microscopy (SEM) to demonstrate the nature of hyphal growth and conidial formation of E. cichoracearum on field-grown squash leaves.


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