PNABD246.pdf

the control for cake and oil, respectively. [THHJ
- Reniforn Nematode
*0600 Castillo, M.B. 1971. Reniforn nematode, Rotylenchulus sp. in mrngo,
soybean and peanut soils at the UPCA Central Experiment Station. PHILIPPINE
PHYTOPATHOLOGY, v.7(1/2):61-63. [Enj (REP.MB-1658)
A nematode survey in mungbean, soybean and peanut at the UPCA Central
Experiment Station revealed the prevalence of the reniform nematode,
Rotylenchulus sp. Mungbean appeared to be the most favored host and peanut the
least favored. The average number of nematodes in 300 cc of soil samples from
mungbean, soybean and peanut was 1395, 808 and 129, respectively. In all the
crops, nematode infestation was observed to be associated with root necrosis.
More egg masses were observed in stained mungbean roots. Trace infestations of
other plant parasitic and non-parasitic nematodes were also observed. In
mungbean soils, the parasitic nematodes were Meloidogyne and Hemicycliophora.
[THH]
*0601 Bajet, N.B. ; Castillo, M.B. 1974. Effects of Rotylenchulus
reniformis inoculations on mung bean, soybean and peanut. PHILIPPINE
PHYTOPATHOLOGY, v.10:50-55. [En] [En AbstJ (REP.MB-2801)
In simultaneous pot experiments, inoculations with field populations of the
reniform nematode, Rotylenchulus reniformis, at approximately 20,000 larvae per
plant, resulted in yield reductions of 41.5%, 21.3% and 27.7% in mungbean,
soybean and peanut, respectively. In mungbean, the reduction was statistically
significant at P=0.05; yield reductions in soybean and peanut were significant
only at P=0.10. Weights of tops and roots of mungbean were also reduced by
30.5% (significant at P=0.10) and 48.9% (significant at P=0.01) respectively.
Reductions in weights of tops and roots of soybean and peanut were not
significant. Other than these gross effects, no other symptoms of nematode
damage, including root necrosis, were apparent on inoculated plants. [AS]
*0602 Castillo, M.B. ; Bajet, N.B. ; Harwood, R.R. 1976. Nematodes in
cropping patterns. I. Population of Rotylenchulus renLformis on successively
monocultured crops. PHILIPPINE AGRICULTURIST, v.59(7/8):288-294. [En] [En
Abst] (REP.MB-0026)
Marked differences in active population of Rotylenchulus reniformis
resulted after successive monocultures of different crops. Two croppings of
corn or sorghum or three fallow periods checked the population; three croppings
of mungbean or soybean or two croppings of sweet potato favored population
build-up, with nematode counts increasing with number of croppings. Apparent
but less increase was also noted after two croppings of bush sitao or peanut.
When the seven aforementioned crops were replanted in their respective plots,
population was drastically suppressed, regardless of the crop, when two
post-plant applications of carbofuran 3G, an insecticide-nematicide chemical
(at the rates of 1.5 and 6.0 kg a.i./ha), were made. However, one subsequent
cropping of the susceptible mungbean on these plots increased the population,
with more apparent increases when preceding crops were monocultured soybean and
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