2.6. Evaluations of actinomycetes in Fusarium wilt sick field
The five most potential antagonistic actinomycetes from the in
vitro and greenhouse studies were further evaluated individually
for their antagonistic potential in Fusarium-infested field at ICRISAT,
Patancheru, during 200910 cropping seasons. The field was
maintained as wilt sick plot since 1980 (Nene et al., 1981). Each
actinomycete isolate was inoculated by four different methods viz.
M1 ¼ inoculation of the seeds by soaking in the respective actinomycete
culture for 1 h; M2 ¼ inoculation of the sprouted seeds
by soaking in the respective actinomycete culture for 1 h;
M3 ¼ inoculation of the soil with respective actinomycete culture
(5 ml per seed, 108 CFU ml1) at the time of sowing and
M4 ¼ inoculation of the seedlings after emergence with the
respective actinomycete culture (5 ml per seedling, 108 CFU ml1).
Thus, the combination of actinomycete isolates four methods of
inoculation constituted 20 independent treatments in addition to
one positive control, where no actinomycete was inoculated. Each
treatment was replicated three times in randomized complete block design (RCBD) and the plot size was 3 rows of 2 m long with
a row spacing of 30 cm and a plant-to-plant spacing of 10 cm.
Chickpea seeds of a Fusarium wilt highly susceptible cultivar JG-62
(acquired from the Legumes Pathology Division, ICRISAT), were
surface-sterilized with sodium hypochlorite (2.5% for 5 min) and
rinsed with sterilized water (eight times) before being sown into
the field. During the cropping season, a maximum temperature
range between 30.1 C and 34.3 C and a minimum temperature
range of between 9.2 C and 16.2 C were recorded. Incidence of
Fusarium wilt disease (number of plants showing wilt symptoms to
2.6. Evaluations of actinomycetes in Fusarium wilt sick fieldThe five most potential antagonistic actinomycetes from the invitro and greenhouse studies were further evaluated individuallyfor their antagonistic potential in Fusarium-infested field at ICRISAT,Patancheru, during 200910 cropping seasons. The field wasmaintained as wilt sick plot since 1980 (Nene et al., 1981). Eachactinomycete isolate was inoculated by four different methods viz.M1 ¼ inoculation of the seeds by soaking in the respective actinomyceteculture for 1 h; M2 ¼ inoculation of the sprouted seedsby soaking in the respective actinomycete culture for 1 h;M3 ¼ inoculation of the soil with respective actinomycete culture(5 ml per seed, 108 CFU ml1) at the time of sowing andM4 ¼ inoculation of the seedlings after emergence with therespective actinomycete culture (5 ml per seedling, 108 CFU ml1).Thus, the combination of actinomycete isolates four methods ofinoculation constituted 20 independent treatments in addition toone positive control, where no actinomycete was inoculated. Eachtreatment was replicated three times in randomized complete block design (RCBD) and the plot size was 3 rows of 2 m long witha row spacing of 30 cm and a plant-to-plant spacing of 10 cm.Chickpea seeds of a Fusarium wilt highly susceptible cultivar JG-62(acquired from the Legumes Pathology Division, ICRISAT), weresurface-sterilized with sodium hypochlorite (2.5% for 5 min) andrinsed with sterilized water (eight times) before being sown intothe field. During the cropping season, a maximum temperaturerange between 30.1 C and 34.3 C and a minimum temperaturerange of between 9.2 C and 16.2 C were recorded. Incidence ofFusarium wilt disease (number of plants showing wilt symptoms to
การแปล กรุณารอสักครู่..
