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Pests Of Jatropha
Jatropha Curcas is gaining significance commercially as the demand of fossil fuels increases greatly and also Jatropha is an eco-friendly energy plantation. Plantation of this plant is considered to be an excellent fuel replacement and it is also very economical compared to other fuels. Recently, Jatropha is facing some problem with pests and illness. The insects are classified into two varieties: Pest that affect young plants and Pest that affect developed plants.
Young plant insects: Cutworm, Scarabeid Beetle, Army worm, Grasshopper.
Agrotis ipsilon: It is commonly referred to as Cut worm. This pest impacts the seedlings and young Jatropha plants. If the plant is impacted by the cutworm, the stem gets cut nearer to the soil surface and this will diminished the plant entirely.
Control: This bug can be controlled by choosing the larva discovered around the plants or by blending the bran, sawdust with insecticides.
Scarabaeid Beetle: This bug ruins the root of the young plant. Initially, the larva consumes the organic matters present in the soil and after that pertains to the root. The larva attack might kill the entire plant.
Control: The plant with great resistance power can get rid of the pest. For heavy attack, insecticides with components carbosulfan and carbofuran can be utilized to kill the pest.
Army worm: Spodoptera litura presence can be recognized by biting in the leaves. The severe infection might completely kill the plants.
Control: Insecticides are utilized to control the insects.
Grasshopper: This is typical insect discovered in several plants. Valanga nigricornis and migratoria commonly attacks the plant. The insect often assaults the young plant.
Control: The insecticides used betacyfluthrin, cypermethrin, thiodicarb, MIPC, and fipronil.
Pest observed in mature plants:
Pest of Stem: Ostrinia furnacalis, Xyleborus spp.
Ostrinia furnacalis and Xyleborus: This bug harms the Jatropha stem and it is extensively seen in Indonesia. The stem assaulted by this insect generally drop. The existence can be identified by the larva penetration hole at the stem.
Control: The Insecticide typically used to manage this insect is carbofuran.
Pest of leaf: The typical insects observed are leaf caterpillar, Neetle caterpillar, Leaf hopper, Mite, Ear corn caterpillar.
Leaf Caterpillar: This bug can consume 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 managed by picking the old larvae around the surface and throwing away the assaulted leaves.
Needle Caterpillar: This caterpillar is covered with spinal columns and produces a burning feeling when permitted to contact with skin as it produces specific chemical substance. Initially the bug crowded in the leaf and after that spread out all over the plant when it gets older.
Control: Manually, the bug can be eliminated only by soaking it in water or kerosene. The heavy attack can be managed by spraying organophosphate insecticides.
Leaf Hopper: This insect is found mostly in tropical and subtropical regions. The pest targets the leaf and draws all the nutrients of the leaf and gets curls at the tip. Later, the whole leaf dry and pass away.
Control: The heavy attack can be managed by utilizing insecticides like imidachloprid, beta cyfluthrin or carbosulfan.
Mite: Mite also attacks the leaf and makes the entire plant weak. The bug presence can be identified when the leaf become yellowish, shrinks, turns red and drop. The insect can also be spread through fallen leaves.
Control: Some preventive steps can be done like appropriate sanitation and burning the fallen leaves. Heavy attack can be dealt with by spraying insecticides.
Some awful insect which assaults flower and fruit are, Stink bug (Nezara viridula)
Chrysocoris javanus, Tip borer caterpillar.
Stink Bug: Sting bug is a severe bug which attacks the plant throughout blossom duration so the crop yield totally drops. This insect is seen around the tropical area.
The hazardous enzyme in the plant diminishes the entire plant.
Control: Insecticides advised for this bug is chlorfluazuron, diflubenzuron, alfamethrin, and lamda cyhalothrin.
Tip borer caterpillar: The bugs commonly takes place attacks the plant in blooming season and this pest is seen commonly in tropical regions. The female bug laid the eggs on the tender part of the plant and the young larvae feed the young fruits and plant suggestions.
Control: Manually, the assaulted seeds are advised to burn. The insecticides like monocrotophos and bensultap are sprayed at the flowering season.