Commercial Lac Insect Farming: Kusum, Palas, and Ber Host Management

Commercial lac culture is a traditional, forest-based allied agricultural activity that provides critical income to rural and tribal communities in India, particularly in Jharkhand, Chhattisgarh, West Bengal, and Madhya Pradesh. Cultivating the lac insect, Kerria lacca, allows farmers to utilize existing host trees on their land without requiring large fields. However, achieving profitable returns in this sector depends on market prices, host tree health management, and pre-secured distribution contracts. Farmers must understand the biology of the lac insect and follow proper management practices to ensure high yields.

What is Lac Culture and Kerria Lacca

Lac is a natural commercial resin secreted by a tiny scale insect named Kerria lacca. The insect lives as a parasite on the sap of specific host trees. The female insect secretes a resinous substance around her body to protect herself from predators and weather. As millions of insects settle close together on tree twigs, their secretions merge to form a continuous encrustation along the branch, which is harvested as raw lac.

The life cycle of the lac insect involves four stages: egg, nymph, pupa, and adult. The cycle begins when young nymphs, also known as crawlers, emerge from the mature female cells. These crawlers search for tender shoots on the host tree, insert their long mouthparts into the bark, and begin sucking the sap. Once settled, they do not move and start secreting the resin. The entire cycle takes about six months, allowing for two crops a year.

It is interesting to note the biological roles within the colony. Male lac insects are smaller than females and do not secrete significant amounts of resin. In fact, females secrete more than ninety percent of the commercial resin harvested. The sole purpose of the male is to fertilize the female, after which the male dies. Once fertilized, the female increases her sap consumption and resin secretion, growing rapidly and forming the bulk of the commercial sticklac.

Managing Host Trees for Lac Inoculation

The yield and quality of lac depend on the health and variety of the host trees. The three primary host trees used in India are Kusum, Palas, and Ber. Kusum trees produce the highest quality Kusmi lac, which is light in color and commands a premium price in the market. Palas and Ber trees are used to produce Rangeeni lac, which is darker and widely harvested in central India.

Host trees must be managed systematically to ensure a continuous supply of food for the insects. Divide your host trees into groups or coupes. This allows some trees to rest and recover while others are inoculated. A tree that has hosted a heavy lac crop needs a rest period of one to two years before it can be inoculated again. Over-inoculating a tree without letting it rest can weaken the tree and kill its branches.

Soil health under the host trees is also important. While these trees are hardy and grow in wild environments, applying organic compost or manure around the base of the trees improves their nutrient absorption. When the host trees are healthy, their sap flow is strong and steady, which allows the lac insects to feed easily and secrete thicker layers of resin. Ensure the tree basins are cleared of weeds and wild creepers.

Pruning Host Trees for Fresh Shoots

Pruning is the most critical step in host tree management. The young lac nymphs have delicate mouthparts and cannot feed on the thick, hard bark of old branches. Pruning stimulates the growth of tender, succulent shoots that are rich in plant sap, providing the perfect feeding ground for the crawlers. Pruning should be carried out using sharp tools to make clean cuts at a slant, preventing water accumulation.

The timing of pruning varies by host tree and crop cycle. For Kusmi lac on Kusum trees, prune in January-February for the summer crop and June-July for the winter crop. For Rangeeni lac on Palas and Ber, prune in February for the October-November inoculation and in October for the June-July inoculation. Always remove dead, diseased, and crossing branches during pruning to improve air circulation and sunlight penetration.

Make your pruning cuts at a forty-five degree angle using sharp loppers or pruning saws. This slant prevents rainwater from pooling on the cut end, which can cause fungal wood rot. After pruning, apply a protective copper fungicide paste to the cut ends of major branches. This simple step keeps the host tree healthy and disease-free, ensuring a thick crop of succulent shoots for the upcoming inoculation season.

Broodlac Selection and Quality Criteria

Broodlac refers to the mature lac-bearing twigs containing gravid female insects that are ready to emerge as crawlers. Selecting healthy broodlac is essential to prevent crop failure. Good broodlac should have thick, uniform resin coverage and show signs of emerging nymphs, which appear as tiny yellow spots on the resin surface. Avoid broodlac that has been attacked by pests, moths, or fungal mold.

Calculate the amount of broodlac needed based on the size of the host tree and the availability of fresh shoots. Over-stocking a tree with broodlac leads to crowding, resource competition, and starvation of the nymphs. Under-stocking results in vacant shoots and a low yield. Once harvested, use the broodlac within three to four days to ensure that the crawlers emerge directly onto the host tree branches.

If you must store the broodlac for a few days due to weather delays, keep the bundles in a cool, well-ventilated, and shaded room. Never stack the broodlac twigs in large heaps, as this causes heat build-up inside the pile. High temperatures trigger premature crawler emergence inside the storage room, leading to massive nymph losses before they can be tied onto the host trees. Hang the twigs individually from ropes if possible.

Artificial and Natural Inoculation Methods

Inoculation is the process of transferring the young crawlers from the broodlac to the fresh shoots of the host tree. Natural inoculation, or self-inoculation, involves leaving a small portion of the lac on the tree during harvest, allowing the next generation to settle on the same tree. Although this saves labor, it increases the risk of pest build-up and is not recommended for commercial farms.

Artificial inoculation is the preferred method for commercial production. Cut broodlac twigs into lengths of twenty to thirty centimetres. Tie these twigs into small bundles of three to four sticks. Place the bundles in plastic or nylon mesh bags to protect them from birds and rain. Tie these bundles securely onto the fresh shoots of the host tree, ensuring the twigs lie in close contact with the bark. Once the crawlers have emerged and settled, remove the empty broodlac bundles to prevent pests from spreading.

The orientation of the broodlac bundles during artificial inoculation is very important. Tie the bundles in such a way that the emerging crawlers can walk upwards onto the new shoots. Nymphs always crawl towards light and gravity, so placing the broodlac below the fresh shoots ensures they distribute themselves evenly. Do not tie the bundles too tightly, as this can crush the female cells and prevent the crawlers from escaping.

Pest Management and Predator Control

Pests and predators pose a major threat to lac farming, often destroying more than half of the crop. The two major moth predators are Eublemma amabilis (the white lac moth) and Pseudohypatopa pulverea (the black lac moth). The larvae of these moths bore into the lac encrustation and feed on the lac insects. Parasitic wasps also lay eggs inside the lac cells, killing the developing insects.

Biosecurity and pest control measures should be followed. Use sixty-mesh nylon bags to wrap the broodlac bundles before tying them to the host trees. These bags allow the tiny lac nymphs to crawl out but prevent predator moths from entering and laying eggs. Any pest control and disease treatment advice here is indicative; farmers should consult qualified forestry experts, KVKs, or agricultural universities. Always avoid using chemical pesticides that can kill the beneficial lac insects.

Biological control is an effective and eco-friendly way to manage predator populations. Farmers can release Trichogramma wasps, which are egg parasitoids that target the eggs of the predator moths without harming the lac insects. Also, soaking the harvested broodlac bundles in cold water for a few hours before inoculation helps drown some predator larvae while keeping the lac nymphs safe inside their thick resinous cells.

Harvesting Ari Lac and Phunki Lac

Lac is harvested by cutting the mature lac-bearing twigs from the host tree. There are two types of harvested lac: Ari lac and Phunki lac. Ari lac is harvested when the lac insects are still alive and have not emerged from their cells. This is usually done when there is a shortage of labor or when farmers need immediate cash. However, harvesting Ari lac reduces the availability of broodlac for the next cycle.

Phunki lac is harvested after the crawlers have fully emerged from the mother cells. This method is sustainable because it provides both a harvest of dry resin and healthy broodlac for the next crop. During harvest, leave about ten percent of the branches unharvested if you plan to use natural inoculation. Use sharp pruning shears to avoid cracking the branches, which can lead to fungal infections on the host tree.

Economic decisions during harvest time depend on local market conditions. If sticklac prices are high, farmers may decide to harvest a portion as Ari lac to secure immediate cash. However, they must balance this with the long-term need for broodlac. Keeping a dedicated seed coupe where trees are only harvested as Phunki ensures that the farm remains self-sufficient and does not need to purchase expensive broodlac from outside markets next season.

Scraping and Processing Crude Lac

After harvesting, the raw lac must be processed to remove impurities. The first step is scraping, where the resin encrustation is removed from the twigs using manual scraping knives or mechanical rollers. The scraped material is known as sticklac. Sticklac contains wood pieces, sand, dead insects, and a natural red dye.

Crush the sticklac and wash it in large stone vats filled with water to dissolve the red dye and float away wood debris. The washed and dried product is called seedlac. Seedlac is further processed by melting it in long canvas bags over charcoal fires. The molten lac is stretched into thin sheets, cooled, and broken into flakes, which is the commercial product known as shellac. All processing steps should be done in dry conditions.

Industrial Uses of Shellac

Shellac is a versatile natural resin with a wide range of industrial applications. Because it is non-toxic and biodegradable, it is used in the pharmaceutical industry to coat tablets and pills, protecting them from stomach acids. In the food industry, shellac is used as a glazing agent to coat fresh fruits, candies, and chocolates, extending their shelf life and giving them a shiny appearance.

In the wood and paint industry, shellac is dissolved in alcohol to make high-quality varnishes and French polish, which highlights the grain of wooden furniture. It is also used as an electrical insulator in motors and transformers due to its high dielectric strength. Other uses include cosmetics, printing inks, and grinding wheels. The industrial demand for shellac ensures a stable market for raw lac.

Financing Lac Cultivation and Host Management

Establishing a commercial lac farm requires investment in broodlac, pruning tools, ladders, mesh bags, and pest control inputs. Farmers should understand that agricultural loans, which can be secured under Kisan Credit Card allied limits, are specifically designed to fund broodlac purchase, pruning tools, pest control agents, and host tree management. These loans are separate from regular crop cultivation loans and are structured around the lac production cycle.

Farmers seeking finance should remember that NABARD acts as a refinancing agency through commercial and rural banks. Since individual direct lending is not offered by NABARD, applications must be made at local banks or regional rural cooperative societies. Ensure you have clear land records or forest lease agreements before applying. Prepare a simple business plan showing expected yields.

Agristack and State Land Portals

Under the state-by-state rollout of the digital Agristack scheme, a national registry of all farming activities is being established. To access government schemes, subsidies for tools, and streamlined credit, farmers should register on their state's land portal to get a unique Farmer ID. Having this digital record connects your land papers with your ID, streamlining verification processes for bank loans and crop insurance. This registry also helps the government plan infrastructure support.

Although PMFBY is the main national scheme, certain states like West Bengal operate their own crop insurance systems. In West Bengal, the state-sponsored Bangla Shasya Bima scheme provides premium-free coverage for oilseeds and food crops instead of PMFBY. For lac culture, check with your state forest department or tribal cooperative regarding specialized schemes that cover crop losses due to extreme heat or pest epidemics. Always verify all rules, subsidy rates, and application steps on the official portal of your state forest department or with local Krishi Vigyan Kendra experts.

Frequently asked questions

What is the scientific name of the lac insect?

The scientific name of the lac insect is Kerria lacca.

What are the primary host trees used for lac cultivation in India?

The primary host trees are Kusum (Schleichera oleosa), Palas (Butea monosperma), and Ber (Ziziphus mauritiana).

What is the difference between Kusmi and Rangeeni lac?

Kusmi lac is grown on Kusum trees and has higher quality, while Rangeeni lac is grown on Palas and Ber trees.

What is broodlac?

Broodlac is a mature lac-bearing twig used as seed to inoculate new host trees.

What is the difference between Ari lac and Phunki lac?

Ari lac is harvested before the larvae emerge, while Phunki lac is harvested after the crawlers have emerged.

Why is pruning host trees necessary?

Pruning stimulates the growth of tender, succulent shoots which are easier for young lac nymphs to feed on.

How do you inoculate host trees using artificial methods?

Tie broodlac bundles wrapped in plastic or nylon mesh onto fresh shoots of the host tree.

What are the main predators of lac insects?

The main predators are the moths Eublemma amabilis and Pseudohypatopa pulverea.

What is sticklac?

Sticklac is raw lac that has been scraped from host tree twigs before processing.

What is seedlac?

Seedlac is sticklac that has been crushed, washed, and dried to remove impurities like dye and wood.

Can I get a bank loan for lac farming?

Yes, you can get agricultural loans or KCC allied limits to purchase broodlac, pruning tools, and pest control items.

Does NABARD provide direct credit for lac cultivation?

No, NABARD refinances loans through regional, commercial, and cooperative banks and does not lend directly to individuals.

How does Agristack benefit lac farmers?

Registering on the state's land portal under Agristack gives you a Farmer ID, simplifying verification for subsidies.

Is lac insect farming risk-free?

No, returns depend on host tree health, weather conditions, market prices, and pre-secured distribution contracts.

Does West Bengal provide crop insurance for lac?

West Bengal runs the premium-free Bangla Shasya Bima scheme for food and oilseed crops, but lac is usually covered under forestry schemes.