Journal of Applied and Natural Science 6 (2): 633-637 (2014)
Exploring the potential of seed flour from pigeon pea genotypes to retard the
growth and development of Helicoverpa armigera.
Sheetanshu Grover1, Satvir Kaur Grewal1*, Anil Kumar Gupta1 and Gaurav Kumar
1Department of Biochemistry, Punjab Agricultural University, Ludhiana (Punjab), INDIA
2Department of Plant Breeding and Genetics, Punjab Agricultural University Ludhiana, (Punjab), INDIA
*Corresponding author. E-mail: firstname.lastname@example.org
Abstract : Helicoverpa armigera is one of the most
devastating known pest causing major economic losses. Development of insect
resistance against chemical pesticides and the environment concerns are forcing
researchers to pave way towards biopesticides. Our study aimed to test the
efficacy of seed flour from ten pigeon pea genotypes against H. armigera
development. H. armigera fed with diet containing pigeon pea seed
powder exhibited larval and pupal weight reduction and certain abnormalities.
Larval weight reduction varied from 19 % (AL 1495) to 37 % (AL 1677). Increase
in larval duration was seen in genotypes containing higher trypsin inhibitor,
phenols and phytic acid. AL 1677 was found to be the most resistant genotype
with 37 % larval weight reduction followed by AL 1735. Larval-pupal
intermediates were observed in diets containing AL 1495 and AL 1747 seed powder.
The pupal weight reduction varied from 15.5 % to 44.5 %. Results from this study
suggest the inhibitory potential of PIs and other bioactive compounds such as
phenols and phytic acid from pigeon pea cultivars against H. armigera
development, that can be further exploited in pest management..
Keywords : Helicoverpa, Inhibitors, Insect, Pigeon pea, Proteases.