dc.contributor.author |
MAHFOUZ M |
|
dc.contributor.author |
ABD-ELGAWAD |
|
dc.date.accessioned |
2023-03-06T07:33:07Z |
|
dc.date.available |
2023-03-06T07:33:07Z |
|
dc.date.issued |
1990-07-11 |
|
dc.identifier.citation |
Abd-Elgawad, M. M. (1990). Relationship of nematodes to yield of maize grown under different cultivation regimes. Pakistan Journal of Nematology, 8(2), 117-125. |
en_US |
dc.identifier.issn |
0255-7576 |
|
dc.identifier.uri |
http://142.54.178.187:9060/xmlui/handle/123456789/17609 |
|
dc.description.abstract |
Relationships between population densities of different nematode species at harvest and yield of maize were examined for 4 cropping sequences on sandy loam soil in Ismailia, Egypt. Correlations calculated
between the total plant-parasitic nematode population densities and yield were not significant for individual cropping sequences tested; whereas among the individual genera, population densities of Helicotylenchus
pseudorobustus only had significant (P=0.05) negative correlation with yield in two cropping sequences. Log-transformed nematode densities, however, revealed additional negative correlation between maize yield and density of Heterodera zeae. The general relationship was described by Y = 409.1283 - 1.2113 X1 - -0.7330 X2 + 0.2430 X3 + 0.2429X4 where Y = yield or ear weight (g/plant), X1, X2, X3 and X4 nematode population densities of Helicotylenchus pseudorobustus, Heterodera zeae juveniles, Pratylenchus brachyurus and Tylenchorhynchus latusper 100 cm3 soil at harvest; respectively (P = 0.0628). Accordingly, maize yield loss estimate caused by the nematodes was 63 g/plant. At harvest, no significant correlations were found between population densities of the different nematode species in each site including a cropping sequence. Yield components of individual maize cv. Giza 2 plants were more than that produced by cv. Double hybrid 202. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Karachi, National Nematological Research Centre (NNRC), University of Karachi, |
en_US |
dc.title |
RELATIONSHIP OF NEMATODES TO YIELD OF MAIZE GROWN UNDER DIFFERENT CULTIVATION REGIMES |
en_US |
dc.type |
Article |
en_US |