What Is Cartap and How It Controls Insect Pests with Systemic Action

Introduction to Cartap
Cartap is a systemic, contact, and stomach insecticide primarily used in rice and vegetable farming. It belongs to the nereistoxin analog class and is known for its effectiveness against chewing and sucking pests such as stem borers and leafhoppers. Cartap acts quickly and provides long-lasting pest control, making it an essential tool in integrated pest management programs.

Chemical Profile and Mode of Action
The chemical name of Cartap is S,S′-[2-(dimethylamino)-1,3-propanediyl] dicarbamothioate, and its formula is C7H16ClN3O2S2. It functions by inhibiting nerve signal transmission in insects, leading to paralysis and death. Specifically, it blocks the nicotinic acetylcholine receptor channels in the insect nervous system. Its systemic action allows it to be absorbed by plant tissues, offering protection from inside the plant.

Common Agricultural Uses
Cartap is widely used in crops like rice, sugarcane, potatoes, cabbage, and other vegetables. It is particularly effective against:

• Rice stem borers

• Leaf folders

• Leafhoppers

• Beetles

• Mites

It is applied through foliar sprays, soil treatment, or granule broadcasting. Cartap is also known to reduce egg-laying behavior in pests, helping to suppress population growth.

Benefits of Cartap

• Fast action: Quickly paralyzes and kills pests after ingestion or contact.

• Systemic protection: Absorbed by the plant for internal protection.

• Broad pest control: Effective on multiple pest types including borers and hoppers.

• Low mammalian toxicity: Considered less toxic to humans and animals compared to many organophosphates.

• Compatible with IPM: Fits well into integrated pest management programs.

Safety, Toxicity, and Environmental Concerns
Cartap is generally considered to have moderate toxicity to aquatic organisms but lower mammalian toxicity. However, improper use can lead to phytotoxicity or environmental contamination. Use of protective clothing and following recommended dosages are essential. It is important to prevent runoff into water bodies and avoid overapplication to delay pest resistance.

Limitations and Resistance Management
Like any pesticide, continuous use of Cartap can lead to pest resistance. To manage this risk:

• Rotate with insecticides having different modes of action.

• Avoid repeated applications in the same growing cycle.

• Follow integrated approaches with biological and cultural control methods.

Usage Guidelines and Formulations
Cartap is available in several forms including:

• Cartap hydrochloride 50% SP (soluble powder)

• Cartap hydrochloride 4% GR (granular)

• Cartap hydrochloride 20% SP

Dosage and frequency depend on the crop and pest. Always refer to the local agricultural extension service or product label for exact instructions.

FAQ About Cartap

Q1: What kind of pesticide is Cartap?
Cartap is a systemic and contact insecticide from the nereistoxin analog group. It is used mainly to control chewing and sucking insect pests.

Q2: Is Cartap safe for beneficial insects?
It is relatively selective, but excessive use may harm some non-target organisms. Avoid spraying during flowering to protect pollinators.

Q3: Can Cartap be mixed with other agrochemicals?
Yes, it is usually compatible with many pesticides and fertilizers, but always conduct a jar test before mixing.

Q4: Is Cartap allowed in organic farming?
No, Cartap is synthetic and not permitted under organic farming regulations.

Q5: How long does Cartap remain effective after application?
Cartap offers protection for 5–10 days depending on environmental conditions, pest pressure, and dosage used.