I - --ii

174
stage (Tab. 6). Of the five cultivars in the date of planting trial (Tab. 7), two
showed no frost damage even at the flowering stage. One of these, namely, ILC
202, also has a high degree of resistance to aschochyta blight, the remaining
three genotypes showed a reasonable level of tolerance to frost at the preflowering
stage and possess tolerance to aschochyta blight.
Table 6
Frost reaction of a few lines identified as resistant at the pre-flowering and seedling stages.
Frost reaction Frost reaction
Acc. No. Seedling Preflowering Ace. No. Seedling Preflowering
ILC 3279 2 2 ILC 7 2 7
ILC 72 2 3 ILC 75 2 4
ILC 194 2 3 ILC 76 2 7
ILC 212 2 3 ILC 108 2 5
ILC 456 2 3 ILC 119 2 6
ILC 482 2 o 3 ILC 120 2 7
ILC 1246 2 3
Table 7
Effect of date of planting on the frost tolerance of some chickpea genotypes. Evaluation made 5 days
after occurrence of frost at Tel Hadya, 1980-81.
Planting dates
Stage of crop growth Nov 19 Dec 21 Jan 23 Feb 22
at frost occurrence: Flowering Preflowering Vegetative Seedling
Genotypes
ILC 482 6 3 3 1
ILC 484 6 3 3 1
ILC 262 I 1 I I
ILC 190 6 3 3 1
ILC 202 I 1 1 I
Discussion
The observed reaction of chickpeas to sudden frost at various stages of ontogeny
is consistent with that observed for other crops (Levitt 1969; Sutcliffe 1977;
Herzog 1978). More rapid growth and advanced ontogenic development are
associated with higher sensitivity to frost damage for which Levitt (1969) has