Potatoes disease control

Disease control by green manure is an artificial application of allelopathy. Isothiocyanates released from cruciferous plants are an example of this allyl isothiocyanate (166), which is derived from the glucosinolate sinigrin (167), is the most popular example.98 Application of Geranium carolinianum for the control of Ralstonia solanacearum, the cause of bacterial wilt of potato, and potato scab, which is induced by some Streptomyces spp., was reported.99 100 One of the antibacterial constituents was shown to be ethyl gallate (168).101... 

The most common use of temperature for disease control is cold storage. In general, storing harvested crops at low temperatures slows the growth of possible pathogens. The optimum storage temperature, however, varies from crop to crop. Apples and many other harvested fruit, root, and leafy crops store best at temperatures as close to freezing as possible. The flavor of bananas and avocados, however, are ruined at such low temperatures. Similarly, winter squash, pumpkins, and sweet potatoes keep best at 50°-60°E... 

Reliable labor saving disease control agent for Phytophthora infestans on potatoes in Japan (H. Hadano, Bayer CropScience, Japan)... 

In this market, it is sprayed up to ten times per season, at 7 to 14 day intervals, depending on the severity of the outbreak [166-169]. Despite this intensive use as a stand-alone product, there is no indication of resistance to fluazinam developing [62] and it is especially useful for the control of Phyto-phthora that has developed resistance to other fungicides [72]. It also has some effect against other potato diseases [170, 171]. 

A bright new star, a nova, named DDT had just burst brilliantly into the plant protection heavens. It was accompanied by some bright satellites the dithiocar-bamatesforplant disease control 2,4-Dfor weed control and DDfor nematodes. Crop plants have never been so free of pests since agriculture was established. In the leaf hopper areas of America, potatoes have never been so green in September. The yields were doubled, often quadrupled. ... 

Key words principles of organic farming, weed, pest and disease control on organic farms, organic farming and the enviromnent, organic winter wheat, organic potato production. 

Diphenylamine inhibits the development of scald disease during prolonged cold storage of apples and pears (42—45). It prolongs the fresh appearance of cut snapdragons (46), controls weather fleck in tobacco, inhibits algae formation, and shows growth inhibitory activity in potatoes (47). 

Mepronil is a systemic fungicide to control diseases caused by Basidiomycetes in cereals, rice, potatoes, vegetables, etc. 

Signs Causes warty outgrowths on all tissues other than the roots. Most frequently affected are the stems, stolons, and tubers. Outgrowths can be tan, green, or brown. Currently there is no control for this disease. Once introduced into a field, the entire crop may be rendered unmarketable. Moreover, the fungus is so persistent that potatoes cannot be grown again safely for many years. 

Maneb 486 (Figure 25) is an ethylene bis-dithiocarbamate (EBDC) fungicide used in agriculture for the control of early and late blights in potatoes and tomatoes, as well as many other diseases in fruits, vegetables, field crops, and... 

The limiting factor in tomato production in the tropics is more apt to be a virus disease than a fungus disease of the foliage. The control of virus disease by control of the insect vector has been investigated in Mexico on potatoes (leaf roll, purple top), tomatoes (several unidentified viruses, one of which perhaps is curly top), and corn (corn stunt). Virus control in this way has been variable but usually negligible. This lack of control perhaps is due to slow kill of the insect vector, or to the continuous entry of the vector into the field. 

Avoid the use of tobacco if you grow tomatoes, peppers or Irish potatoes. Tobacco coutaius tobacco mosaic viras (TMV) which will get ou your hands and be spread to plants which you touch. Equipment, insects or anything touching an infested plant and then another plant is also likely to transfer the disease from plant to plant. TMV is very hard to control and reduces both fruit set and fmit size. Total yield of TMV-infested plants may be reduced slightly or nearly wiped out. Leaves of infested plants may be distorted and will probably have a mottled appearance rather than a solid green color. Remove isolated plants showing these symptoms as soon as they appear. 

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