الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 193 |  |  |
| | | from | 193 | | |
Abstract
The effect of Radish seeds acetone and petroleum ether extracts
on seed germination of maize varieties and the chlorophyll content of their
seedlings leaves is given in Table (41). The data showed an obvious decline in
germination rates of the treated varieties 3062,3057 and 30p09 at various storage
intervals compared with the untreated maize grains. On the other hand this effect
was very low on Dahab variety at vanous observation periods.
Meanwhile. Significant effect was found between the chlorophyll content
of the seedlings leaves of the treated maize varieties and control
at various storage periods.
In general, germination rates of the various maize varieties were
declined with prolonging of the storage periods. Also, Cloves flowering
buds extracts had shown the highest effect on maize Varieties germination rates
especially at 2% (w/w) concentration compared with the other
tested plant extracts. At the same time, the germination rate
of Dahab variety. showed lower susceptibility to the tested
plant exlracts compared with the germination rates of other maize
varieties at various storage periods.
The obtained results are in harmony with the findings of other
investigators (kamel, ct. al., 1964; Ivbijaro 1983; Barney et. al., 1991;
Ellakwah ct. al., 1993 and Hassan, 2001).
Kamel et al. 1964 and Ivbijaro (1983) stated that the protectants
i.e dry and ground neem seed did not affect the germination rate of
maize grains during storage. Barney et al, (1991) mentioned that
germination rates of maize grains treated by malathion significantly decreased
when progeny of S. zeamaise were present. Hassan, (2001) mentioned that
maize grains, mixed with certain grain Protectants resulted in a higher
percentage of germination rate than the control. Maize grains treated
with malathion recorded the highest percentage of germinatjon
followed significantly by ash, sand, super- phosphate and neem leaf powder .
Also, EI- lakwah. et. aI., (1993) investigated the effect of Various
concentrations of phosphine at varying exposure periods on germination rates of
wheat, maize, broad bean cowpea, cotton and squash seeds, the growth
rate and chlorophyll content of their seedlings.
Results indicated that germination rates of the various crops seeds
did not significantly affected even when fumigated with the highest
dosage of phosphine wich was 7times higher than the recommended dose.