Pests Of Jatropha
Jatropha Curcas is getting significance commercially as the need of fossil fuels increases significantly and likewise Jatropha is an environmentally friendly energy plantation. Plantation of this plant is considered to be an excellent fuel replacement and it is likewise extremely cost-effective compared to other fuels. Recently, Jatropha is facing some problem with pests and illness. The bugs are categorized into two varieties: Pest that affect young plants and Pest that impact developed plants.
Young plant pests: Cutworm, Scarabeid Beetle, Army worm, Grasshopper.
Agrotis ipsilon: It is typically called Cut worm. This pest affects the seedlings and young Jatropha plants. If the plant is affected by the cutworm, the stem gets cut nearer to the soil surface and this will shrunk the plant completely.
Control: This insect can be managed by picking the larva found around the plants or by blending the bran, sawdust with insecticides.
Scarabaeid Beetle: This insect destroys the root of the young plant. Initially, the larva consumes the natural matters present in the soil and then concerns the root. The larva attack may eliminate the entire plant.
Control: The plant with good resistance power can get rid of the bug. For heavy attack, insecticides with components carbosulfan and carbofuran can be utilized to kill the insect.
Army worm: Spodoptera litura existence can be identified by biting in the leaves. The extreme infection could totally eliminate the plants.
Control: Insecticides are utilized to manage the insects.
Grasshopper: This prevails pest found in numerous plants. Valanga nigricornis and Locusta migratoria commonly attacks the plant. The pest frequently attacks the young plant.
Control: The insecticides utilized betacyfluthrin, cypermethrin, thiodicarb, MIPC, and fipronil.
Pest observed in mature plants:
Pest of Stem: Ostrinia furnacalis, Xyleborus spp.
Ostrinia furnacalis and Xyleborus: This insect harms the Jatropha stem and it is extensively seen in Indonesia. The stem assaulted by this insect generally drop. The existence can be recognized by the larva penetration hole at the stem.
Control: The Insecticide generally used to manage this insect is carbofuran.
Pest of leaf: The common pests observed are leaf caterpillar, Neetle caterpillar, Leaf hopper, Mite, Ear corn caterpillar.
Leaf Caterpillar: This insect can eat all the leaves of the plant simply put duration. The quality and yield of the seeds get decreased due to the heavy attack.
Control: This can be controlled by picking the old larvae around the surface and discarding the assaulted leaves.
Needle Caterpillar: This caterpillar is covered with spines and produces a burning feeling when permitted to exposure to skin as it produces specific chemical compound. Initially the insect crowded in the leaf and after that spread out all over the plant when it ages.
Control: Manually, the insect can be killed only by soaking it in water or kerosene. The heavy attack can be managed by spraying organophosphate insecticides.
Leaf Hopper: This pest is discovered mainly in tropical and subtropical areas. The bug targets the leaf and sucks all the nutrients of the leaf and gets curls at the pointer. Later, the entire leaf dry and pass away.
Control: The heavy attack can be controlled by utilizing insecticides like imidachloprid, beta cyfluthrin or carbosulfan.
Mite: Mite likewise assaults the leaf and makes the entire plant weak. The insect existence can be recognized when the leaf become yellow-colored, shrinks, reddens and fall down. The insect can also be spread out through fallen leaves.
Control: Some preventive procedures can be simulated appropriate sanitation and burning the fallen leaves. Heavy attack can be treated by spraying insecticides.
Some dreadful bug which assaults flower and fruit are, Stink bug (Nezara viridula)
Chrysocoris javanus, Tip .
Stink Bug: Sting bug is a major bug which attacks the plant throughout bloom period so the crop yield entirely drops. This pest is seen around the tropical area.
The toxic enzyme in the plant diminishes the whole plant.
Control: Insecticides suggested for this insect is chlorfluazuron, diflubenzuron, alfamethrin, and lamda cyhalothrin.
Tip borer caterpillar: The pests commonly occurs attacks the plant in flowering season and this bug is seen commonly in tropical areas. The female insect laid the eggs on the tender part of the plant and the young larvae feed the young fruits and plant suggestions.
Control: Manually, the attacked seeds are recommended to burn. The insecticides like monocrotophos and bensultap are sprayed at the flowering season.
