Contents - Faperta

130 Biotechnological Approaches for Pest Management and Ecological Sustainability
FIGURE 5.5 Production of auxiliary tillers in sorghum as a result of damage to the main shoot by the sorghum
shoot fl y, Ahterigona soccata, which serves as a mechanism of recovery resistance.
The ability to recover from H. armigera damage is also an important component of resistance
in chickpea and pigeonpea (Figure 5.6) (Lateef, 1985; Srivastava and Srivastava, 1989;
Lateef and Sachan, 1990; H.C. Sharma et al., 2005a). Effects of tolerance are cumulative as a
result of inter- and intraplant growth compensation, mechanical strength of tissues
and organs, and growth regulation and partitioning (Tingey, 1981). Plants with a tolerance
mechanism of resistance have a great value in pest management as such plants
also prevent evolution of new insect biotypes, and help in maintaining the populations
of the natural enemies.
Pod damage/yield loss (%)
100
90
80
70
60
50
40
30
20
10
0
ICPL 187-1
ICP 7203-1
ICPL 88039
Pod damage (%)
Yield loss (%)
ICPL 98001
ICPL 98008
ICPL 87091
T 21
ICPL 84060
ICPL 87119
ICP 7035
ICPL 332
ICPL 87
FIGURE 5.6 Recovery resistance to Helicoverpa armigera in pigeonpea. The genotypes suffering high pod
damage and low yield loss (ICPL 187-1, ICP 7203-1, ICPL 87091, and ICPL 84060 have good recovery resistance
to damage by pod borer).