If leaf web insects are not managed in time, significant losses can occur for mango, guava, litchi, and other fruit crops in orchards.

By: Merikheti
Published on: 07-Nov-2023

It's important to note that leaf web insects can cause significant losses for fruit crops in orchards if not managed in time. According to  Dr. SK Singh, a Professor of Plant Pathology and Head of the Department at the Post Graduate Department of Plant Pathology, this insect has become a major pest in recent years due to heavy moisture in the b environment. The insect, commonly caused by mango, guava, and litchi leaf weevil, can cause extensive damage to fruit orchards. The insect becomes active from July until December and lays eggs on the leaves, which then hatch and eat the leaves. Proper management and pruning are essential to prevent these pests from causing damage to gardens and orchards.


Also read: To effectively manage leaf webber pests in mango, guava, and litchi trees, a comprehensive approach that includes both preventive and curative measures is necessary. Leaf webbers are common pests that belong to various families of moths, such as Pyralidae and Crambidae. They are known for building web-like structures on the leaves of fruit trees and consuming leaf tissue within the shelter. The larvae of these insects are the main cause of damage, as they feed on leaves and can cause extensive damage to the tree if not controlled. Mango, guava, and litchi trees are particularly vulnerable to infestation by these pests. If you encounter any problems related to diseases and pests, there is a helpline number available to assist you in resolving them.



Identification of Leaf Weber Insects

It's important to correctly identify the particular leaf weaver species that is affecting your fruit trees before delving deeper into management strategies. Various types of weevils can infest mango, guava, and litchi, and their appearance and life cycles can differ. One common symptom of leaf webber infection is the presence of silky webs on leaves and leaf drops. You may also spot small, green caterpillars inside the web.


Also read: Now farmers themselves will export litchi abroad, the government gives green signal



Preventive Measures

To prevent leaf webber infestations in mango, guava, and litchi trees, several preventive measures can be taken. Regular pruning of trees is essential to improve air circulation and penetration of sunlight, which can make the environment less favorable for leaf trapping. It's also important to maintain the proper distance between trees to reduce the density in the garden and prevent the spread of infection



Proper distance between trees

Maintaining proper distance between trees helps reduce density in the garden and also reduces the spread of infection.


Removing infected leaves

Immediately remove and destroy Webber-infected leaves to prevent the spread of pests.


Biological control

Encourage Natural Predators Attract and protect natural predators such as ladybugs, lacewings, and parasitic wasps that feed on leaf weaver larvae.


Also read: You can reduce your agricultural costs by adopting organic pest control tips.


Release beneficial insects

Consider using beneficial insects such as Trichogramma wasps that lay their eggs in Weber eggs, thereby controlling their populations.


Chemical-free option

Neem Oil: Neem oil acts as a natural insecticide and can be used as a spray on leaves to prevent leaf webs. Garlic and chili spray: A homemade solution made from garlic and chili peppers can help remove leaf webs. If there is an organically managed orchard, spraying with B.thurungiensis is recommended.


Chemical control

If preventive measures and biological control methods are not sufficient, you need to resort to chemical control options. It is important to use pesticides judiciously, following safety guidelines and considering their potential environmental impact. Consult local agricultural authorities or entomologists for guidance on choosing the most appropriate chemical control methods.


Also read: Know what are the differences between pest control and pest management


Pesticides 

Selective insecticides: Use insecticides that specifically target leaf webber insects while sparing beneficial insects. Systemic insecticides: Some systemic insecticides can be applied to the soil or trunk, allowing the tree to absorb the chemical and inhibit leaf weaver larvae. Cutting the web from time to time using any tool and burning it reduces the ferocity of the insect. This work should be done at regular intervals. After this, spray Lambdaisothrin 5 EC (2 ml/liter of water). The second spray should be done after 15-20 days of the first spray with either Lambdacylothrin 5 EC (2 ml/Lit of water) or Quinalphos 25 EC (1.5 ml/Lit of water).


Time of application

Use insecticides during the initial stage of leaf webber infestation for better control.

Prevent the development of pesticide resistance

To prevent the development of pesticide resistance, use different chemical classes in rotation as needed.


Integrated Pest Management (IPM)

Integrated Pest Management (IPM) is an approach that combines various strategies to manage leaf webber pests efficiently while minimizing harm to the environment and non-target species. The process involves continuous monitoring, making decisions based on the extent of pest infestation, and using a combination of different agronomic measures, biological control methods, and chemical control methods.



Also read: Integrated organic farming will make the earth fertile: Happy farmer, healthy human being.



Monitoring and decision-making

Monitoring Methods Regularly inspect trees for signs of infestation such as webbing and larvae in the leaves. Use pheromone traps to monitor adult weaver populations.


insect limits

Establish pest limits to determine when intervention is necessary. This ensures that you apply control measures only when pest populations reach a certain level, preventing unnecessary pesticide use.


Record-keeping

Keep detailed records of pest populations, weather conditions, and control measures implemented. This data helps in making decisions for future pest management.


Conclusion

Effective management of leaf webber pests in mango, guava, and litchi trees requires a comprehensive approach that combines various strategies such as cultural, biological, chemical, and integrated pest management. To prevent leaf webber infestations, it is recommended that preventive measures are implemented, natural predators of leaf webber are promoted and chemical control options are used sparingly. Regular monitoring and decision-making based on established pest limits are critical for successful leaf webber management. It is important to identify the specific leaf webber species that affect your trees and consult with local agricultural experts for the most appropriate management measures in your area. By following these guidelines, you can help ensure that your fruit trees remain healthy and productive.