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Pest management

 

 
Diagnostic module

Many pests limit profitable mango production, the major ones with the control measures that can be adopted are given in this module. Several images are displayed according to their type of pest and its infestation in the above scrolling window horizontally. By clikingthe appropriate image, the detailed page appears for more diagnostic measures.

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Mango hoppers The critical crop stage for spraying is panicle emergence when hopper density exceeds four per panicle. Spraying of imidacloprid 200 SL @ 0.3 ml/L or lamdacyhalothrin @ 0.5ml/L, IIHR’s neemsoap@10gm/L, or Azadirectin 3000ppm @ 3ml/L are effective for control.

Fruitfly: Pre-harvest IPM from 45 days prior to harvest consisting of field sanitation through weekly removal of fallen fruits and raking the drip area below tree, spraying deltamethrin (0.0028%) 21 days prior to harvest, male annihilation with 8-10 methyl eugenol traps / acre, two bait sprays of 10% jaggery on the tree trunks @ 50-75 ml/tree and avoiding delay in harvest followed by post harvest treatment within 24 hr of harvest of fruits in hot water at 48C for an hour need to be practiced for effective control. Jaggery bait can be prepared by mixing 100g jaggery and 2 ml of Decamethrin in one litre of water. This solution is splashed on the tree trunk up to 0.5m from base of the tree.

Stone weevil: Spraying deltamethrin (0.0028%) on tree trunk during off-season and on fruits at lime size is recommended. Removal and destroying of all fallen fruits and seeds after harvest helps to reduce the pest population in the subsequent season.

Mealybug: It is one of the serious pests of mango. Ploughing the soil during summer, applying 25 cm alkathene bands on the trunks and spraying garlic oil (1%) or neem extract (4%) below the bands help in controlling this pest. Spraying and drenching with Chlorpyriphos (0.05%) also helps in control.

Shoot borer: This pest destroys young plant if neglected. Spraying of acephate @ 1.5g/L or Quinalphos (0.05%) or Dimethoate (0.045%)is recommended.

Stem borer: This is becoming a serious pest, especially of old orchards. Infestation leads to die back and death of tree. Orchards should be maintained healthy and active larval holes should be identified based on the appearance of fecal matter and chewed tissues protruding out, which should be plugged with cotton dipped in dichlorovos (0.05%) or petrol and covered with mud. Grubs can also be collected manually by inserting a metal hook and killed.