Effect of Insecticidal and Hormonal Spray on the Production of Fruits in Teak Seed Orchard

Abstract

The problem of poor seed setting in teak seed orchard at Mohghata Bhandara Forest Project Division (Maharashtra) was reported by the Managing Director, Forest Develepment Corporation of Maharashtra and Consenator, of Forests, Research and Education,Maharashtra Major insert pests which cause direct or indirect loss to the production of teak seed are, fruit borer and inflorescence feeder Pagyda salvalis, sap sucking bug, Leptocentrus vicarius and fruit borer, Dichocrocis punctiferills Defoliator, Hyblaea puera and skeletonizer, Eutectona machaerlis were noticed feeding on inflorescence in the absence of leaves, during present investigations. In the year 1980 various insecticides tested to control the insect pests were, dimeceron 0.05% nuvacron 0.05%; anthio 0.03%. endosulfan 0.25%, fenitrothion 0.25% and sevin 025%. along with hormonr alpha nophthyl acetic acid (planofix) 20 ppm. In the year 1981, only 2 insecticides i.e. nuvacron and endosulfan, which proved better in 1980 were sprayed. Different dosayes of nvacron i.e. 0.025% and 0.125% and endosulfan 0.125% and 0.0625% were tried so as to optimise the disc of application. Alpha nephthyl acetic acid (planofix) 40 Ppm was sprayrd alongwith the higher dose of the insecticides. The studies revealed that the best results as regards production and protection of inflorescence and fruits, can be obtaioned by spraying nuvacron 36 E (0.025%) and eodosolfan 35 EC (0.125%) water emulsion together with harmone, alpha nephthyl acetic ocid (NAA) 40 ppm.