PNABD246.pdf

[En] [En Abst] (REP.tB-1924)
Nematode-free mungbean plants and plants germinated in soil infested with a
combination of approximately 1,200 R. reniformis and 90 M. acrita were
transplanted in pots and microplots containing baked soil and in the field with
very low nematode populations. In a similar experiment, approximately 600 M.
acrita alone were used as inoculum under pot and field conditions only. Plant
reactions to inoculation with R. reniformis-M. acrita complex consisted
reduced
of
seedling emergence, leaf chlorosis, severe necrosis and light galling
of roots, stunting, early flowering and reduced pod size, plant stand and
weights of roots, tops and yield. Percentage yield reductions in pot, microplot
and field were b3.9, 69.8 and 61.5, respectively, with no signiticant
differences among Locations. Computed yield loss in field due to nematode
inoculation amoUnted to P11P2,38//ha. inoculation with M. acrita alone caused
reduced seedling emergence, Leaf chlorosis particularly under moisture stress,
very severe root necrosis and galling, stunting and reduced plant stand and
weights of tops and yield. Percentage yield reductions in pot and field were
40.5 and 28.9, respectively, with that in the former being significantly
higher. Yield loss in field due to nematode inoculation was computed to be
PIP436/ha. [AS)
*0583 Castillo, M.B. ; Litsinger, J.A. 1978. Plant parasitic nematodes of
mungbean in Philippines. IN: The Ist International Mungbean Symposium.
Shanhua, Tainan : AVRDC. p. L95-200 (SB205.M1815)
MEETING: International Symposium on Mungbean, 1st --- Los Banos, Philippines,
Aug 1i-19, 1977
The plant parasitic nematode genera Rotylenchulus and Meloidogyne are the
only important pests of mungbean in the Philippines. In upland areas, mixed
populations of these two genera are found in almost any field where mungbean is
grown, and heavy root infections are frequently associated with crop decline.
Conversely, very low nematode populations are observed in lowland areas where
mungbean usually follows paddy rice. Symptom.s, population dynamics and control
methods of the pests are discussed. Of the hundreds of varieties, including
local lines and those from AVRDC, which were screened resistance te root-knot
nematodes, only one line, a multifoliate mutant, showed some resistance to M.
acrita, M. incognita, and M. javanica, but was susceptible to M. arenaria. [THH]
*0584 Kaushik, H.D. ; Bajaj, H.K. 1980. Nematodes associated with pulse
crops in laryana. INDIAN JOURNAL OF NEMATOLOGY, v.IO(I):92-96. [En] [En
AbstJ (REP.MB-2275)
Analysis of samples, collected around roots of Cajanus cajan (pigeonpea),
Vigna radiata (mungbean), V. mungo,(blackgram), V. aconitifolius (mothbean) and
V. unguiculata (cowpea) from fifteen villages of Hissar district revealed the
presence of nematodes, including Paraphelenchus amblyurus Steiner, 1934 and
male of Longidorus siddiqii Aboul-Eid, 1970 which are being recorded for the
first time from India. [AS]
*0585 Reddy, K.C. ; Soffes, A.R. ; Prine, G.M. 1986. Tropical legumes for
green manure. 1. Nitrogen production and the effects on succeeding crop yields.
AGRONOMY JOURNAL, v.78(I):I-4. [En] [En Abstj (A:PS)
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