Published Paper Details:

ABSTRACT Pea leaf weevil is also scientifically known as Sitona lineatus. The pest feeds on peas, beans and other plants of family Fabaceae. Adults are approximately 3-5mm in length with coloured scales series in striae on elytra. Fine pointed setae amongst the scales are present at the pronotum and head region. Antennae are preceded by seven segments and are generally clubbed and pointed in appearance. Tibia and tarsi are red coloured whereas the femur appears dark. They hibernate in winter. Breeding occurs in spring. Adults feed on leaf margins making it notch edged whereas larvae feed on root nodules. Yield loss is approx. 30-40%. Although chemical-pesticides protect the yield but they are harmful for the environment. So for the sake of environment, bio-pesticides should be used. The present study has the following extracts that may be used as bio-pesticide, i.e. Curcuma longa, Zingiber officinale and Barleria prionitis. At an interval of 5 days these extracts were used for 3 days for checking their efficacy against Sitona lineatus. When results were observed it showed that Barleria prionitis was most effective with highest mortality of about 85.74% and Zingiber officinale was least effective with only 60.45% of mortality. However Curcuma longa showed fewer efficacies than Barleria prionitis but was still more effective than Zingiber officinale with 72.38% of mortality. Damage % on Pisum sativum after application of 1st , 2nd , 3rd and 4th round of Curcuma longa was 3.02, 3.45, 3.57 and 3.60 whereas for Barleria prionitis it was 2.84, 2.99, 3.07 and 3.15 and as for Zingiber officinale it was 3.17, 3.40, 3.85 and 4.26. Percent infestation reduced when Barleria prionitis was used.