TAILIEUCHUNG - Studies on pathogenicity of potato cyst nematode, globodera rostochiensis and G. pallida on potato
The pot culture experiments were conducted under polyhouse condition to study the pathogenicity of potato cyst nematode, Globodera rostochiensis and G. pallida on potato cv. Kufri Jyoti at different inoculum levels of 0, 10, 100, 1000 and 10,000 J2 per plant. The results revealed that, the potato cyst nematode Index was at inoculum level of 10,000 J2/plant and at 10 J2 per plant. However, the reproduction factor was highest with the lowest inoculum level of 10 J2/ plant where as , and respectively with the initial inoculum levels of 100, 1000 and 10,000 J2 / plant. A gradual increase in the nematode inoculum levels declined the plant growth parameters progressively from 100 to 10,000 second stage juveniles (J2) per plant. The highest reduction in plant growth was recorded at a level of 10,000 J2/plant and the minimum was recorded at a level of 100J2/plant, where as 1000 J2/plant recorded as an Economic Threshold Level. Inoculation of 1000 J2/plant showed , , and per cent reduction in plant height, fresh weight, dry weight and yield per plant compared to uninoculated control. The maximum of % yield reduction was recorded, at an inoculum level of 10,000 J2/plant followed by and % at a levels of 1000 and 100 J2/plant respectively. | Studies on pathogenicity of potato cyst nematode, globodera rostochiensis and G. pallida on potato
đang nạp các trang xem trước
