Pests and Management
Brinjal fruit and Shoot borer (Leucinodes Orbonalis)
It is widely distributed in many Asian Countries and highly infest brinjal. It is active through out the year and this proper management is required to escape destruction by it. It lays eggs on the ventral surface of leaves, shoots and flower buds and thus starts its damaging effect after the seedlings are transplanted till fruits are harvested. The caterpillars enter from under the calyx in the flower bud and start feeding inside. The flower buds which are damaged either shed off or if fruits are developed, it shows small circular holes. The damaged tender shoots and fruits with bore holes should be destroyed. By using light traps at 1/ha can kill moths by attracting them. Insecticides like 2kg of Carbaryl 50 WP and 2kg 50 WP wettable Suphur or 250-340 ml of Fenpropathrin 30 EC or 625 – 1000g of Thiodicarb 75 WB can be used to protect against damage. Resistant varieties of brinjal may be used.
Hadda Beetle (Epilachna Vigintioctopunctata)
They feed on the upper surface of the leaves and also between the veins and to the mid rib. The leaves dry off turning brown and ultimately fall of the plant. The adult beetles and the pupae can be mechanically destroyed or they can be collected in kerosenated water by shaking off the plants. It can also be controlled by spraying an emulsion of 1 litre of neem oil with 60 g of soap dissolved in 1/2L of water by mixing it with 20 L of water and 400g of well crushed garlic. A spray of Diflubenzuron with 1.5 L of Endosulfan or 1.0 L/ha Chlorpyriphos also effectively reduces its population.
Brown Leaf Hopper (Cestius Phycitis)
It mainly sucks the sap from lower leaf surfaces by piercing and sucking, which leads to injection of toxic saliva in plant tissues causing reduction in size of leaf, petioles and gives plant a more bushy appearance. It can be controlled by dipping the seedling in 0.2% Carbosulfan 25 DS solution. It can also be curbed by spraying Methyl Parathion 750 ml or Dimethoate 500ml or Imidacloprid 125ml 3 or 4 times in interval of 10 days.
Ash Weevils (Myllocerus Subfasciatus)
It feeds on roots leading to wilting and death of plants. It can be managed by various ways and through application of certain chemicals. During the last ploughing, neem cake at 500kg/ha or Endosulfan 4% D at 25kg/ha should be applied. It can also be curbed by spraying 2.5 kg of Carbaryl 50 WP in 375 L of water per hectare.