The trend of farmers has increased towards horticulture in the last few crops. The main reason for which is related to income. In fact, horticulture crops are cash crops for the farmers. Farmers get better profits by selling them. In this episode, in the last few years among the farmers production of lemons Has become very popular. Lemon is a cash crop for farmers. The production of which is considered simple for the farmers. But, to make it profitable, farmers need to take many precautions. In which the leaf miner insect is necessary for the lemon plant for the farmers. Failure to do so can result in huge loss to the farmers.
In this episode, the country’s senior fruit scientist Dr. SK Singh is telling the farmers about the diseases of lemon plants and ways to prevent them through TV9 Bharatvarsh Digital.
This insect is found only in small plants
According to the country’s senior fruit scientist Dr SK Singh, when the lemon plant is small, the citrus leaf minor citrus insect appears during that time. He said that it is a major pest and remains active from March to November. It damages a group of citrus fruits like lemon, lime, orange and pomelo.
He said that citrus leafminer larvae feed themselves by making shallow tunnels or grooves in the young leaves of citrus trees. Insects are commonly found on oranges, mandarins, lemons, peppermints, grapefruits, and other plants. The citrus leafminer is the only mining pest (tunnels or drains). Which usually attacks lemon (citrus) leaves.
How to recognize the symptoms of this pest
According to the country’s senior fruit scientist Dr SK Singh, Citrus leafminer is a very small, light colored insect, which is less than 1/4 inch long. It has silver and white iridescent forelimbs with brown and white markings and a distinct black spot on the tip of each wing. The hind wings and body are white, with the hind wings extending from the margin.
The insect’s larvae are found only inside the trunks of lemon leaves and other closely related plants, he said. As the larva develops, it leaves a thin (fecal) mark, seen as a thin line, inside the veins running down the surface of the leaf. This attribute is used to help identify the pest.
insect life cycle
The citrus leafminer has four life stages, which include egg, larva, pupa and adult insect. The adults do not harm the plants and live only 1 to 2 weeks. Adult moths are most active at dawn and dusk and spend the day resting on the undersides of leaves, but are rarely seen. Immediately after leaving the pupal case, the female insect emits a sex pheromone that attracts the male insect. After mating, the female host lays single eggs on the undersides of the leaves. On the tree, newly emerged leaflets of flush growth are a particularly preferred oviposition site.
Leaves dry up due to insect attack
The citrus leaf miner can survive as a larva in citrus crops. Unless a large population is present, older leaves that have become tough are not susceptible. The larvae tunnel into the under or upper surface of newly emerging leaves, causing them to become twisted and distorted.
Leaves infested with this pest turn yellow, dry up and eventually fall or dry up on the branches. Mining injuries act as centers of infection due to citrus canker, a bacterial disease.
How to control citrus leafminer pest
According to the country’s senior fruit scientist Dr SK Singh, farmers should collect and destroy the leaves affected by this pest. Heavy pruning of the affected parts should be done during monsoon. Avoid frequent irrigation and excessive use of nitrogen fertilizers. Since the larvae are inside the mines, they cannot be easily killed by the use of insecticides. However, the use of some systemic insecticides can reduce the infection to some extent.
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