High throughput evaluation of Cajanus scarabaeoides pigeonpea progenies for identifying gram pod borer tolerance
Sujayanand GK, Dibendu Datta, Arti Katiyar, Sonika Pandey, Umesh Kumar and Krishna Kumar
The pigeonpea pods of 89 genotypes, derived from Early 3 X ICP 15685 (Cajanus scarabaeoides) and UPAS120 X ICP15761 were subjected to detached pod assay against pod borer, Helicoverpa armigera larva under no-choice condition for assessing their tolerance in four batches of experiment. The highest pod consumption (0.320g/larva, 0.257g/larva, 0.160g/larva and 0.270g/larva) was recorded from the genotypes viz., WD22-1-5, WD 24-1-5 & WDBCE 2-1-1, WDBCE 3-3-1 and WD 5-5-3. The lowest pod consumption and consumption index (CI) is noticed from the following 4 genotypes, WD22-3-3 (0.060g/larva & 0.085), WD 24-1-6 (0.070g/larva & 1.18), WDBCE 3-4-2 (0.080g/larva & 1.15) and WD 5-3-2 (0.087g/larva & 0.89). Out of 89 pigeonpea genotypes screened, 16 were moderately tolerant to pod borer (RFDP: 61 to 80) while a single genotype, WD22-3-3 was found to be tolerant with highest RFDP (81.25). These 17 pigeonpea genotypes are being stabilized and can be exploited further in the pigeonpea improvement programme for incorporating pod borer resistance.