Not knowing what’s biting you can be frustrating and a little unnerving. Charcoal stump rot (Ustulina zonata): Lightning is a pre-disposing factor for charcoal stump rot. Annual report of each year is released by September of the following year. Tea mosquito, Helopeltis theivora (Miridae: Heteroptera: Hemiptera): Adults and nymphs punctures the plant tissues with needle like rostrum and suck the sap from buds, young leaves and tender stems. Root mealy bug, Dysmicoccus sp. Developmental stages include six legged larva, protonymph and deutonymph. Lobster caterpillar, Neostauropus alternus (Notodontidae: Lepidoptera): Commonly seen in new clearings and nurseries; completely devour all the leaves from a small plant; forewings of moths are grayish white with few reddish brown spots; eggs are whitish, finely sculptured and laid in small clusters; incubation period is 5-10 days; the black caterpillars are grotesquely shaped and resemble dry leaves; larval period is 3-4 weeks; pupated inside a wooly cocoon; adults emerge after 10-14 days; Cut worm, Spodoptera litura (Noctuidae: Lepidoptera): Attack the maintenance foliage; made irregular holes on the tea leaves by feeding; adults have white hind wings; forewings are grayish brown marked with silvery lines; eggs laid in clusters, hatched in 3-4 days; larvae are dull olive green in colour and feed for 3 weeks; pupated in the soil for one week. Tea Thrips, Scirtothrips bispinosus (Thripidae: Thysanoptera): Prefers young leaves and buds; continuous feeding causes lacerations which appear as streaks; leaf surface becomes uneven and curled; feeding marks on the buds later appear as two parallel lines; attack more pronounced in the fields recovering from pruning; leads to inordinate delay in tipping and consequent crop loss; adults characterised by their brown abdomen, Incubation period is 6-8 days; egg hatch into larva, two larval instars, creamy white in color, prominent eyes; prepupa and pupae are found in the leaf litter and soil; adults emerge from the pupae after 3-5 days; weak fliers, dispersal and migration is helped by wind; build up starts by Nov/Dec. (Eucharitidae: Hymenoptera): Wasp lays eggs on tea leaves; oviposition marks appear as a line of punctures; there is no serious threat. Uprooting of affected bushes, forking and loosening soil and taking 60 X 60 X 60 cm pits 3-4 months prior to planting and keeping them open for aeration are suggested. Adults and immature stages suck the sap from tender shoots. Fringed nettle grub, Darna nararia (Limacodidae: Lepidoptera): Caterpillars scraping on the under surface of leaves; during severe outbreak, the leaves are completely eaten off; pale brown adult moths are active at night; eggs are oval, flattened, shiny and laid singly on leaves; incubation period is about a week; larvae are about 1.5 cm and pale green in colour; larvae moult five times and larval duration is five weeks; pupated in the soil for three weeks. This aesthetic looking mineral is full of therapeutic values. Venkata Ram Memorial Annual Tea Colloquium. In some mites the larval stage is the only parasitic stage of their life cycle, for example Trombicula autumnalis. Its incidence was high during July to December and low between January and June. Shoots dry up and crop loss is near total in response to severe incidence. Number of spores ejected in 24 hours is 1.3 million/sq.cm and the pathogen completes its life cycle 11- 28 days. Epsom salt is pink colored magnesium sulfate. During the last seven and half decades, this research organisation. Grasshoppers: Orthacris incongruens and Orthacris robusta (Pyrgomorphidae: Orthoptera): Migrate to tea only when their natural weed hosts are eliminated and feed on mature tea leaves. At the time of planting incorporation of biocontrol agents like Trichoderma species or Gliocladium virens @ 200 g per planting pit is recommended. Application of endosulfan or quinalphos will be effective. Predisposing factors are deep planting, planting in gravelly soils, mulching closer to collar, wound caused by weeding implements, fertilizer application close to the collar, pegging, low moisture status in bark and surface watering during dry weather. Red spider mite (RSM), Oligonychus coffeae has emerged as an important pest of tea in the last few years. Care must be taken to thoroughly drench the maintenance foliage and chemicals should be applied only after plucking. Among the tea diseases, blister blight is the most important leaf disease caused by the pathogen, Exobasidium vexans affecting the tender harvestable shoots of tea resulting in…, Plant Physiology Division was established in 1980 which has been primarily concentrated on crop productivity. Now known as the UPASI Tea Research Foundation (UPASI TRF), had…, Annual Report is the one among the major publications of UPASI TRF. Tea, the globally admired, non-alcoholic, caffeine-containing beverage, is manufactured from the tender leaves of the tea [Camellia sinensis (L.)] plant. Cultural control measures include monitoring the population dynamics by regular field assessment, shade/weed management and removal of alternate host plants (Bidens, Ageratum, Conyza, Crassocephalum, etc). h�b```f``�f`a`��b`@ �r$0p0Ԯabö��� I����� Pestology. The mite's eggs hatch into hexapod larvae. (Isoptera): Damage tea bushes in north-east India while Glyptotermes dilatatus, Neotermes greeni and Postelectrotermes militaris attack tea in Sri Lanka. Alternate hosts are Coffee, Grevillea, Albizia and Erythrina. Direct penetration of pathogen through upper surface of leaf; infects only tender leaves and stem (pluckable shoots); appearance of translucent spot and well developed lesion seen in 2 weeks. Removal of affected portion by pruning to healthy wood and application of copper fungicide or spore suspension of biocontrol agents like Trichoderma and Gliocladium to cut ends are the curative measures. Tea tortrix, Homona coffearia (Tortricide: Lepidoptera): Caterpillars make leaf nests by webbing the leaves, one above the other, using silken threads, and feed from inside; adult moth is brown coloured, bell shaped; eggs are laid in masses, incubation period 6-8 days; larvae are greenish in colour and about 2 cm long; larval period last for 20-30 days; pupal period ranges from 9-15 days. Aphids are largely regulated by biocontrol agents where larvae of the syrphids and the coccinellids are major predators followed by three species of aphidiid parasitoids. Year Total Rainfall mm Mean Sunshine hr/day Mean Temperature ° C Mean Relative Humidity % at Mean Evaporation…, 14-May-2019 Sealed quotations are invited from the concerned suppliers for the following lab instrument with specifications. The division evolved and recommended physical, chemical and biological method of tea pests control. Factors influencing incidence of red spider mite of tea, Oligonychus coffeae (Nietner) in Assam (Miridae: Heteroptera: Hemiptera): Adults and nymphs injure the tender plant parts. The laboratory has been…. The Handbook…, Of late, considering the constant usage of pesticides and to monitor the residues in the final produce, a well equipped test facility was established at UPASI TRI in 1994. Provides fast relief. Dr. C.S. Pink mite, Acaphylla theae (Eriophyidae: Acarina): Important mite pest of tea in southern India causes considerable damage. Sudhakaran et al. Pink mites attack tender crop shoots where “Aassam” hybrids are more susceptible Predators same as red spider mite Recent issues on pesticide residues and other contaminants in Tea. Especially it is the best ingredient you can use for a refreshing bath. Other publications include Research Highlights and half yearly Newsletters. Cricket, Brachytrupes portentosus: Destructive pest in tea nurseries. Life cycle completed in 6-9 days. Tea tree oil also has insecticide properties and is a helpful home remedy to destroy mites and get rid of them for good. Red borer, Zeuzera coffeae (Cossidae: Lepidoptera): Usually, young stems are bored by the caterpillars; as the larva grows, the tunnel is also extended; holes are made at intervals to eject the excreta and wood particles; tunnel may run even up to root; moths have white wings with many black spots; eggs are laid like beads on a thread; caterpillars emerge in 10 days; they suspend themselves by silken threads and get dispersed; larvae bore into young stems; larvae tunnel downwards, devouring the woody parts, especially the pith; tunnels are extended to thicker branches; mature larva is about 3.5 cm long and purplish brown or reddish brown in colour; larval duration is 4-5 months; pupated in a special chamber for a month.The affected branches may be cut to sound wood. 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