Plant Disease control :
There are various point on which we should focus for the control of plant disease.
A. Selection of geographical area :
Selection of geographical area which on the basis of favourable temperature and humidity requirement for a particular crop but unfavourable to the fungi and bacteria and pest etc...
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B. Selection of field :
Many soil borne diseases are controlled by proper selection of field. It is quite possible that a particular field soil contains a pathogen species. In that case the particular crop is not sown in that field for several years. The causal organism of red rot of sugarcane and survive in the field for several months. Water drainage is also taken care for while selecting the field.
C. Time of sowing :
The susceptible stage of plant growth and the favourable environment for pathogen should not match at the same time.
D. Disease free varieties :
certain varieties of Crop due to their growth characteristic are able to escape from disease. This disease escaping characteristic of the crop is not genetic rather it is due to growth habits and time of maturation. Early maturating variety of pea is capable of escaping powdery mildew and rust.
E. Selection of seed :
Avoid seed borne disease, healthy and disease free seeds are essential for plant Disease control.
F. Crop rotation :
Crop rotation is essential for controlling soil borne diseases and pathogens.
G. Roguing :
Removal of destructive of disease plant organs, eradication of alternate and collateral host and sanitation of field.
H. Modification of cultural practices :
cultural practices such as distance between the plant, time and frequency of irrigation, transplantation, time and methods, mixed cropping, amount and property of fertilizer and composed etc.. can be changed to reduce losses caused by the disease.
I. Eradication of insect vector :
Insect serve as vector for many diseases. Eradication of such insect vectors is essential for the control of pathogens.
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