Journal of FARM SCIENCES, Vol 23, No 1 (2010)

Font Size:  Small  Medium  Large

Web-forming lepidopteran, Maruca vitrata (Geyer): an emerging and destructive pest in pigeonpea

J.B. Gopali, Raju Teggelli, D.M. Mannur, Suhas Yelshetty

Abstract


In recent years the legume pod borer, Maruca vitrata (Geyer) is a major limitation in pigeonpea production. Keeping this point in view, the field experiments were undertaken on “web-forming Lepidopteran, Maruca virtata (Geyer): An emerging and destructive pest in pigeonpea” during 2005 and 2009 at Agricultural Research Station, Gulbarga, Karnataka, India. Results indicated that incidence of spotted pod borer was high in early (140-150 days) and late maturing (190-200 days) varieties, moderate in medium duration (170-180 days). It is noteworthy to mention that the incidence was high in late sown conditions and also in varieties having clustering type of branching habit.  The management strategies revealed cultural practices such as intercropping with sorghum, time of sowing (first fortnight of June) and removing of weeds belonging to Leguminaceous family reduces the pod borer damage. Among the insecticides, one application of profenphos 50EC @ 2.0 ml/liter of water in combination with DDVP @ 0.5 ml/liter of water at the time of flowering was found most effective in combating the pest and registered lowest pod damage (6.23 %), highest grain yield (10.20 q/ha) with highest cost benefit ration (1: 5.30) as compared to individual insecticides. This treatment is followed by monocrotophos 36SL @ 2.0 ml + DDVP @ 0.5 ml/liter and methomyl 40SP @ 1.0 g DDVP @ 0.5 ml/liter. Biorationals such as Neem Seed Kernel Extract (5%) + DDVP @ 0.5 ml/liter of water was found next best treatment for the management of spotted pod borer.

Full Text: PDF