Fruit is a very important horticultural crop in Bangladesh. The country produces 80 species of fruit which is the best source of vitamins and minerals and contains anti-cancer anthocyanins and lycopene. A significant portion of the fruit crop in the field is destroyed by the attack of harmful insects and spiders. Most of the farmers in the country apply long lasting pesticides to control these pests and collect fruits and market them before the end of the waiting period for pesticides. Since the fruit is eaten directly, if the pesticide is not selected and applied correctly, its residue enters the human body and adversely affects public health and the environment. In this situation, it is very important to gain knowledge about the type of attack and environmentally friendly integrated control management to protect the fruit crop from harmful insects. The main insect infestations of fruit crops and their safe management are discussed.
Mango Hopper Insect: Nymph and adult insects suck sap from young leaves, buds and young parts of trees. The young leaves are stained, the buds fall off and there is no fruit. They secrete a sticky honey juice, which later turns into a black mold fungus. Insects jump on the affected tree and fall on it.
Keep the garden clean and tidy, do not keep the trees dense. Spray Imidacloprid twice to control insects. The first spray is within 10 days of bud buds and the second spray is one month later if the fruit is marble shaped.
Banana leaf and fruit beetle: Newborn larvae enter the soil and eat tree roots. Later they scratch the leaves. Dry black or dark brown spots are seen on the affected leaves. After the mocha comes out, they attack the young bananas. Infected collar spots are seen, the market price decreases. Attacks are high during the monsoon and monsoon seasons.
Collar mocha covered by polythene bag. As soon as the banana mocha comes out and before the banana mocha emerges on the stick, one end of a 42-inch long and 30-inch wide polythene bag should be inserted into the mocha and the other mouth should be kept open. Put 20-30 small holes in the polythene bag for ventilation.
Cool fruit borer weevil: Newborn larvae attack the growing seeds of young fruit and eat the whole seed, stopping the growth of the fruit. After eating the seeds, the adult insects come out with round holes. They also attack and reproduce during the off-season. As soon as the trees start bearing fruits after pollination, their attack is noticed.
Keep weeds clean, destroy untimely flowers and buds on trees, destroy infected fruits and insects falling on trees and soil, spray 4 ml tracer per 10 liters of water or 12 ml per 10 liters of water at the time of fruiting after pollination.
Guava Flies Insects: Female flies lay eggs on fruit peels. Newborn larvae pierce the fruit and enter and eat the fruit. Infected guavas germinate, after the storm and insect larvae are seen inside the fruit.
Clean tillage, wrapping in perforated polythene or brown paper bags after fruit marble shape and use of pheromone traps.
Lychee fruit borer Insect: Female insect lays eggs under the shell near growing fruit plants. The newborn larvae enter the fruit through the botar and eat the young seeds through the hole. Fine powder like saw powder can be seen in the mouth of the hole. The fruit is unfit to eat and bursts.
Clean tillage, infestation of infected fruit with larvae, bunches of fruit covered with mosquito net or cloth.
Mango leaf beetle: Larvae and adult beetles eat the leaves and young soft tips of the tree extensively. Excessive attack leaves the tree empty, impeding the growth and fruiting of the tree.