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VOL. 6, ISSUE 6 (2021)
Screening of relative susceptibility of different pulses to the pulse beetle, Callosobruchus maculatus fab. (Coleoptera: Bruchidae)
Authors
S Kavitha, G Maheswari
Abstract
A research study entitled “Screening of relative susceptibility of different pulses to Callosobruchus maculatus F. (Coleoptera: Bruchidae) and its biology” was undertaken in the laboratory on variety of pulses. The pulses selected for the study were green gram (Vigna radiata), Cowpea (Vigna unguiculata), Chickpea ‘desi’ and ‘kabuli’ varieties (Cicer arietinum), Horse gram (Macrotyloma uniflorum), Black gram (Vigna mungo) and Soya bean (Glycine max). The selected pulses were subjected to antibiosis (No-choice confinement test) and antixenosis test (Free-choice test) in the laboratory for their comparative resistance against the pulse beetle. The no-choice bioassay was carried out to assess the influence of each seed type on the egg laying of C. maculatus without disturbance by the other seed type. In antixenosis test (Free-choice test), preference and non-preference response of pulse beetle to all test pulses were assessed. The resulting data were subjected to one-way analysis of variance and the mean values obtained were grouped using Least Significant Test (LSD). In no-choice test, maximum number of eggs were found in green gram (61.0±20.74) and minimum in soya bean (30.20±17.17). The adult emergence (63.60±18.06), weight loss (5.39%), frass weight (0.13±0.01), germination (62%) and vigour index (1486.4) and were maximum in green gram. The above said observation confirms through no-choice test that the green gram was highly susceptible to bruchid infestation. Although, the oviposition was observed on black gram (50.60±27.3) and soya bean (30.20±17.17), the adult emergence was nil with lowest percentage of weight loss (black gram 1.07% and soya bean 0.63%). Therefore, the research study confirmed that the black gram and soya bean were highly resistant to C. maculatus. Similar observation were also made from free-choice test where the pulse beetle was attracted more towards green gram and cowpea. The pulse beetle preferred soya bean and black gram as a host seed and require less management practices during storage. The present study revealed that the black gram and soya bean were not suitable for the growth of C. maculatus and can be recommended for relatively long term storage.
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Pages:23-28
How to cite this article:
S Kavitha, G Maheswari "Screening of relative susceptibility of different pulses to the pulse beetle, <em>Callosobruchus maculatus</em> fab. (Coleoptera: Bruchidae) ". International Journal of Entomology Research, Vol 6, Issue 6, 2021, Pages 23-28
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