Agri - Timelines

Management of insect pests: Following schedule of pesticides is recommended for the management of different insect pest of citrus.

1st spray (March-April) Malathion 0.05% or Nuvacron 0.05% for citrus psylla and Endosulfan 0.01% for lemon butterfly

2nd spray (June-July) Malathion or Dimecron or Nuvacron as above for mealy bugs, aphids, white fly and scale insects.

A regular surveillance for trunk borer during July – August is essential. Incase of observation of new fros near the tree trunks/ branches, clean the tunnel with an iron wire, insert a cotton swab soaked in Nuvan / Nuvacron/Petrol and plug the hole with mud or cow dung.

3rd Spray September-October, repeat 2nd spray for above insects. Apply Sevin 5% dust in tree basins and mix thoroughly in the soil. Remove webbing of bark eating caterpillars and treat the hole as recommended for trunk borer.

Management of diseases:

Scab, powdery mildew, anthracnose / die back, gummosis and greasy spot are most frequently observed diseases of Khasi mandarin in the region. Following schedule is recommended for the management of various diseases.

I. December - January

Dead and diseased twigs, branches should be pruned off and burnt or buried deep under the soil.
Application of Bordeaux paste on tree trunk up to 60 cm height from the ground level as well as on pruning cut ends.
Scarification of weeping wounds (gummosis) along with dead portion and pasting of Bordeaux paint.
Spray application of 1.0% Bordeaux mixture on the trees.

II. March – April

Single spray of Bavistin (0.1%) + Nuvacron 0.1% coinciding with the new flushes for the control of scab, powdery mildew, leaf miner and aphids. After a fortnight, spray application of Bordeaux mixture (1.0%) / Blitox (0.25%) / Captafol (0.2%) for the control of anthracnose, twig blight or leaf spot diseases.

May – June – Repeat operation II
July – August - Repeat operation II