MONTHLY BULLETIN FOR NORTH BENGAL - Mr. Pradip Kumar Dutta (Ex. TRA)
• Standard plucking should be undertaken at 7-8 days interval.
• Plucking should be undertaken close to previous plucking mark to avoid undue creep.Undue creep leads to crop loss.
• Black plucking should be undertaken to remove banjhis in case of excessive banjhi formation.
• Airy skiff should be considered to remove dantis incase unbroken dantis left on the plucking table of unprunedarea.
• Removal of banjhis can also be done quickly and effectively by use of mechanical aid.
• Following banjhi removal growth promoters should be sprayed for 2 roundsat15daysinterval.
• Mechanical plucking is to be taken care to give the allowance in growth between two successive plucking rounds.
• Mechanical harvesting is beneficial for maintaining flat plucking surface for further multiplication of shoots.
• Avoid physical damage of the plucked leaves by smooth handling.
• Pluckers should be transfer green leaves from hand into the plucking basket as early as possible.
• Leaf awaiting transportation shouldnt be exposed to the sun.Keep the collected leaves in bags under shade tree. Excess load must be avoided.
• Transfer harvested green leaves on withering trough as early as possible.
• Second split of fertilizer application should be undertaken to mature tea in rainfree days.
• To save the valuable fertilizers from being washed away with rain water as well as through leaching, apply fertilizer during rain free period.
• Keep ground weed free prior to application of fertilizer and ensure uniform distribution of fertilizer.
• Fertilizer application to young tea should be continued.
• Defer application of fertilizer in waterlogged/ flood affected areas till water table recedes.
• Foliar NPK mixture at 15 days interval is to be applied particularly on water logged areas during peak period of monsoon. The mixture can be prepared by mixing 1 kg Urea, 625 gm DAP and 875 gm MOP dilutingto100lofwater.
• Any obstruction in the drain should be removed to maintain free flow of rain water in the drains.
• Spot spraying of weedicides should be undertaken.
• Choice of weedicides will depend on weed flora.
• Sticker should be added with Glyphoset.
Pest & Disease control:
• Pesticide application should be done immediately after plucking.
• Mixing of nutrients with pesticides should strictly be avoided.
• In order to reduce load of pesticide, emphasis should be given on non-chemical pest control tools like different kinds of traps (light trap, yellow sticky trap etc.).
• Continuous monitoring and scouting tremendously helps in controlling the lopper damage.
• Spray Quinalphos 25EC/20 AF @ 1:400 or Bifenthrin 8 SC @ 1:1600 for the early in stars.
• In case, caterpillar attained a developed stage (Beyond 2nd instar) apply Emamechtin Benzoate @ 1:2500 (HV) or Flubendiamide @ 1:5000(HV).
• Red spider mite generally remains at low level during monsoon due to beating effect of rain.
• If there is any dry spell for a week or so, the susceptible patches should be checked.
• Spray affected patches with Spiromesifen 240SC or Fenazaquin 10EC or Fenpyroximate 5% EC or Etoxazole 10 SC or Propargite 57EC or Hexythiazox5.45%EC.
• Thorough coverage of top, middle and bottom hamper of bushes with spray fluid is necessary to kill the residual population.
• Continuous rains/ cloudy weather with intermittent high temperature are the most conducive condition for rapid buildup of Helopeltispopulation.
• Remove the infested shoots by hand from the plucking table before application of pesticide.
• After plucking, apply a round of CIB approved insecticide (Bifenthrin 8SC @ 1:1600 HV/Thiomethoxam @ 1:400 HV/Thiacloprid @ 1:1000 (HV)/Clothianidin@1:4500(HV).
• If required a follow up round is to be used within 8-10 days with change of chemical.
• Always follow barrier spraying method (spray peripheral bushes first followed by spraying of inside bushes).
Red slug caterpillar:
• Light trapping to destroy the moth.
• A thorough round of Quinalphos 25 EC/20 AF @ 1:400 (HV) is to be applied for early in star.
• The under surface of leaves are to be targeted with drenching the whole of the canopy.
• Red rust infection is occurs in inadequate shade, improper soil pH, poor soil fertility particularly potash status, poor drainage etc.
• If rusty sporulations in the stem and spots on leaf persist during July, spray Copper oxychloride 50WP @1:400 (HV) or Carbendazim 12% + Mancozeb 63%WP @1:400 (HV) spray two round sat 15 days interval.
• Spraying should be directed towards young stems and laterals bearing rusty fructifications.
• 1% MOP and urea can be sprayed in the affected sections.