Nontarget Effects of Perticides on Soilborne Plant Pathogens

Authors : Nuh Boyraz

Pages : 103-112

View : 58 | Download : 18

Publication Date : 1997-07-15

Article Type : Research Paper

Abstract :Pesticides may affect crop plants in addition to targets (weeds/pathogens/Insects) whether directly or indirectly by their effect on other organisms which may lead to harmful or benefical effects. Crop plants form various kinds of relationships with other organisms. e.g.. pathogens. Discase of the cach of plant is the final result of a compatible interaction which occurs under suitable conditions between a particular pathogen and host. Other living components connected with disease are the surrounding microflora and fauna which may affect either the pathogen, the host, or both by their antagonistic or synergistic actions. Pesticides in their original form or their degradation products may interact in different ways with any one of the organisms Involved in the disease, at one or more points in the chain of events leading to disease development. The final result may be an increase, decrease, or no change in disease severity or its incidence. The extreme case may be severe outbreak of a \\\"new\\\" disease which was of negligible importance before the application of the herbicide, whereas the other extreme would be the complete climination of an existing severe disease. Soil pathogens are more likely to be affected, since most of the pesticides reach the soil sooner or later.
Keywords : Pestisit, hedef dışı cıki, toprak kaynakh bitki patojeni

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