Cartap: A Selective Contact and Systemic Insecticide

Technical Introduction

Cartap (IUPAC: S,S-[2-(dimethylamino)-1,3-propane-diyl] dicarbamodithioate) is a thiocarbamate insecticide primarily used for controlling chewing and sucking pests, especially caterpillars and leaf-feeding insects. It is often employed as an alternative to organophosphates and neonicotinoids in integrated pest management programs.

• Mode of Action: Acts as a nicotinic acetylcholine receptor agonist, disrupting the nerve transmission in insects. It is also converted in vivo to thioamide, which is highly toxic to target pests.

• Systemicity: Exhibits both contact and translaminar activity, providing protection to newly developing leaves.

• Target Spectrum: Effective against caterpillars, leafworms, armyworms, cutworms, and other Lepidopteran larvae.

Applications

• Rice and Paddy Fields:

  • Controls leafrollers, stem borers, and green leafhoppers.

• Vegetable Crops:

  • Applied on tomatoes, peppers, eggplants, and cabbage to manage chewing caterpillars.

• Cotton and Legumes:

  • Controls Helicoverpa armigera (cotton bollworm) and related Lepidopteran pests.

• Ornamental Plants:

  • Used against leaf-eating caterpillars in greenhouses and landscapes.

Advantages

• Selective Toxicity: Primarily targets Lepidopteran pests while being relatively safe for natural enemies and pollinators when used correctly.

• Fast-Acting: Provides rapid knockdown of chewing pests.

• Dual Action: Works as both contact and translaminar insecticide, offering extended protection.

• Compatible with IPM: Can be rotated with other insecticides to reduce resistance development.

• Cost-Effective: Lower usage rates compared to many broad-spectrum insecticides.

Specifications (Typical Parameters)

FAQ

Q1: How does Cartap differ from organophosphates?
A: Cartap targets Lepidopteran pests selectively and is less toxic to beneficial insects and pollinators, making it more compatible with IPM.

Q2: Can Cartap be used as a foliar spray?
A: Yes. Foliar application ensures direct contact with pests, and translaminar activity protects new leaves.

Q3: Is Cartap effective against sucking pests?
A: It is primarily effective against chewing pests; sucking pests like aphids or whiteflies require other insecticides.

Q4: Can it be mixed with other pesticides?
A: Yes, but always follow compatibility and label instructions to avoid reduced efficacy.

Q5: Are there resistance concerns with Cartap?
A: Resistance can develop if overused. Rotate with insecticides of different modes of action to maintain effectiveness.