PESTICIDAL EFFECT OF EUPHORBIA, NERIUM AND CALOTROPIS LATEX ON SOME LARVAE OF CROP DAMAGINING PESTS
Plant and animals are complimentary to each others, since the starting of civilization, when a hunter man converted himself into a cultivator he gained vast knowledge about plants and their characteristical varieties. The plant were used by human being for their food, shelter, medicines etc. Since the beginning of Ayurved the Ayurvedic vaidys have choosen the medicinal plants which were used by ancient human being traditionally. In our Vadic literatures the worship of Herbs, Shrubs and Tree
... been conducted. Due to rapid deforestation, industrialization and urbanization most of the useful diversity of plants are gradually going towards endangered, some of them have been lost. Such the plants are not important only for medicinal use, but they are also important in the prevention of dangerous insects, pests, fungus and other harmful biotics for crops, vegetables,other stored food materials and animals. The present study is based on the pesticidal effects of Euphorbia neriifolia, Nerium indicum, and Calotropis gigantea latex and its effect on some agricultural larvae of pest Helicoverpa armigera, Mythimna seperata and Raphidopalpa forcicollis which are harmful to the crops. The different diluted concentrations were spread over pest larvae for 12 hrs, 24 hrs and 48 hrs. The above cited concentration of Euphorbia neriifolia, Nerium indicum and Calotropis Gigantea were spread over the larvae of pests Helicoverpa armigera, Mythimna seperata and Raphidopalpa forcicollis. Ten indiuals of each larvae of pests were kept in each patrydishes with triplicates against the control The mortality (mean value in %) rates of Mithimna separate larvae of with different plant latex have recorded in case of Euphorbia neriifolia it was recorded as 32.99%, in case of Nerium indicum it was 36.30% and in case of Clotropis gigantea it was 35.36%. The mortality (mean value in %) of Raphidopalpa facicollis larvae with all three plants have recorded as 30.30% with Euphorbia nerrifolia and 33.05% with Nerium indicum and 33.35 % with Calotropis gigantea. The mortality (mean value in %) of Helicoverpa (Heliothis) armigerea larvae with different plant latex was recorded as Euphorbia nerrifolia 35.12%, in case of plant latex Nerium indicum it was recorded 37.45% and in case of Calotropis gigantea mortality was recorded as 37.02%.