Two years pot experiments under glasshouse conditions were conducted in order to study the virus inhibitory side-effect of some herbicides (napropamide, pendimethalin, fluazifop-P-butyl) on pepper-Obuda pepper virus (ObPV) and Solanum nigrum-ObPV host-virus relations. On the basis of our experiments three types of the herbicide effects have been observed: 1. herbicide treatments prevented virus infection of susceptible host plants; 2. plants were infected by ObPV, but the virus concentration in them was significantly lower as compared to the positive control; 3. herbicide treatments did not influence significantly virus concentration. It has been concluded that the effect of herbicides on host-virus relations greatly depends on hosts (species, varieties), type of herbicides, mode and dosage of application and year. The results draw attention to the fact, that certain herbicides may play an important role not only in weed control but they also have inhibitory effect on economically important plant viruses, Occurring in horticultural and agricultural ecosystems. Fluazifop-P-butyl gave the best results, regarding the protective effect from viral infection, therefore it could be worth to examine the effect of other fatty acid synthesis inhibitors on host-virus relations.
The effect of some herbicides on host-virus relations
ONOFRI, Andrea;
2008
Abstract
Two years pot experiments under glasshouse conditions were conducted in order to study the virus inhibitory side-effect of some herbicides (napropamide, pendimethalin, fluazifop-P-butyl) on pepper-Obuda pepper virus (ObPV) and Solanum nigrum-ObPV host-virus relations. On the basis of our experiments three types of the herbicide effects have been observed: 1. herbicide treatments prevented virus infection of susceptible host plants; 2. plants were infected by ObPV, but the virus concentration in them was significantly lower as compared to the positive control; 3. herbicide treatments did not influence significantly virus concentration. It has been concluded that the effect of herbicides on host-virus relations greatly depends on hosts (species, varieties), type of herbicides, mode and dosage of application and year. The results draw attention to the fact, that certain herbicides may play an important role not only in weed control but they also have inhibitory effect on economically important plant viruses, Occurring in horticultural and agricultural ecosystems. Fluazifop-P-butyl gave the best results, regarding the protective effect from viral infection, therefore it could be worth to examine the effect of other fatty acid synthesis inhibitors on host-virus relations.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
