Manures and fertilizers I year II year III year IV year V year onwards FYM or Compost (kg) 10 20 20 30 50 N(g) 70 140 210 280 500 P(g) 40 80 120 160 200 K(g) 60 120 180 240 300
Fertilizer application may be done during October – November in the East Coast areas. Wherever possible the fertilizer can be applied in two equal split doses during June-July and October-November periods under east coast, with a fertilizer schedule of 1000:125:250 g NPK per tree.
In older cashew plantations, removal of dried or dead wood, criss-cross branches,
water shoots etc. should be done at least once in 2-3 years. Redevelopment of canopy is
possible by heading back of existing senile trees which have exhausted canopies and erratic
growth resulting in reduced yield. Heading back if done at 1.0-1.5 m height of the trees new
flushes will emerge from dormant buds on remaining trunk and develops into a vigorous new
canopy. By and large old cashew plantations are of seedling origin and have become senile.
Such trees can be rejuvenated by grafting with scion sticks of improved and high yielding
varieties on new shoots arising on beheaded stumps. May-June is the right time for
beheading and July-August is for grafting. However, preventative measures need to be
taken to monitor each plant for the attack of cashew stem and root borer on the top worked
Pests Stem borer Collect and destroy affected shoots. Swabbing the bark of exposed roots and shoots with dimethoate 2 ml/lit twice a year before the onset of South West Monsoon (March – April). After cessation of monsoon(November), painting of coal tar + kerosene mixture (1:2) or swabbing with a suspension upto one metre height in the exposed trunk region after shaving the bark or swab the tree trunk with neem oil 5% thrice during January-February, May-June, and September-October Remove grubs from the infested trees at early stage and drench the damage portion with Chlorpyriphos 0.2% @ 10 ml/lit or Neem oil 5% Tea mosquito bug Spray application of phosalone 35 EC @ 2.0 ml, at vegetative flush stage, panicle initiation stage and nut formation stage respectively are recommended for the management of tea mosquito bug. Spray schedule involving three rounds of spray viz., first spraying with profenophos (0.05%) at flushing stage, second spraying with chlorpyriphos (0.05%). Root borer Pour chlorpyriphos 10 ml/tree in the bore holes split into two halves (insecticide 5 ml+ 5 ml water).
Die back or pink disease Prune the affected shoots just below the affected portion and apply bordeaux paste Spray 1% bordeaux mixture or copper oxychloride @ 0.25 % twice in May- June and October as a prophylactic measure
The plant starts yielding from 3rd year onwards. The peak picking months are March
to May. Good nuts are grey green, smooth and well filled. After picking, the nuts are
separated from the apple and dried in the sun for two to three days to bring down the
moisture content to 10 to 12 %. Properly dried nuts are packed in alkathene bags. This will
keep for 6 months.