Table 1 Develoment of Phytomyza. orobanchia generations synchronized with three growth stages of Orobanche crenata spikes in Alexandria region
Generations | Date 2015 | Orobanche growth stage | Phytomyza growth stages | % infested capsules | Accumulated Degree-Days |
|---|---|---|---|---|---|
I | Jan., 11 | Flowering | Eggs | 2.77 | 0.5 |
Jan., 18 | Larvae | 5.55 | 11 | ||
Jan., 29 | Semi-mature | Pupae | 12.25 | 52.5 | |
Feb., 10 | Mature | Pupae | 25.4 | 116.5 | |
II | Feb., 20 | Flowering | Eggs | 1 | 139.5 |
Feb., 23 | Larvae | 15.5 | 156 | ||
Mar., 4 | Semi-mature | Pupae | 16.5 | 187.5 | |
Mar., 11 | Mature | Pupae | 50 | 224 | |
III | Mar., 12 | Flowering | Eggs | 5.5 | 226.5 |
Mar., 13 | Larvae | 7.5 | 229 | ||
Mar., 16 | Semi-mature | Pupae | 36.2 | 240 | |
Mar., 29 | Mature | Pupae | 64.4 | 304 | |
IV | Mar., 30 | Flowering | Eggs | 33.3 | 308 |
Mar., 31 | larvae | 61.6 | 313.5 | ||
Apr., 3 | Semi-mature | Pupae | 66.6 | 333 | |
Apr., 14 | Mature | Pupae | 100 | 463.5 |