The role of different inoculum levels of Meloidogyne javanica juveniles on nematode reproduction and host response of peanut plant.
A pot experiment was conducted to determine the influence of three of inoculum levels (1000, 2000 and 3000 J2 pot(-1)) of Meloidogyne javanica on nematode reproduction and host response of peanut plant cv. Giza 4 under greenhouse conditions at 30 +/- 5 degrees C. In general, nematode reproduction and host damage were both affected by the initial inoculum levels. The greater reduction percentage of plant fresh (57.7%), shoot dry (38.82) and pods weights (52.59%) and nodules numbers (73.33%) were recorded at inoculum level 2000 J2/peanut plant, when rate of nematode build-up reached the maximum value of 1.64. Regression analysis of Pi vs. rate of nematode build-up on peanut plants gave value of R2 amounted to 0.3193. On the other hand, when the initial inoculum level added increased up to 3000 J2/peanut plant, the percentage reduction of whole plant fresh weight (47.07%) and other growth parameters as well as nematode build-up (0.8) also obviously decreased.
El-Sherif
A G
AG
Nematology Research Unit, Department of Agricultural Zoology, Faculty of Agriculture, Mansoura University, Dk., Egypt.
Refaei
A R
AR
Gad
S B
SB
D000818:Animals; D010367:Arachis / Q000033:anatomy & histology / Q000469:parasitology*; D018556:Crops, Agricultural / Q000469:parasitology*; D006790:Host-Parasite Interactions; D014431:Tylenchoidea / Q000502:physiology*