The quantity of antioxidant, flavanols, flavonoids, polyphenols, and catechins biochemical compounds varies among the clones and varieties. Biochemical parameters of green leaves and made tea were analyzed with standard methods using UV-visible spectrophotometer.

A comparative study was undertaken to evaluate the performances of plant cakes and synthetic chemicals against nematodes infesting tea at Bangladesh Tea Research Institute (BTRI) during March 2012 to June 2012.

The study was conducted at Bangladesh Tea Research Institute (BTRI), Srimangal, Moulvibazar, Bangladesh during 2007-08 in both dry and wet season on the mature tea to determine the residue level of Endosulfan (Thiodan 35EC) in black tea at different plucking intervals after spraying and their degradation rate in order to fix the plucking interval to keep the residue level at Maximum Residue Limit (MRL) or below.

An experiment was carried out at the main farm of Bangladesh Tea Research Institute (BTRI) to find the residue levels of commonly used two organophosphate insecticides, namely chlorpyrifos and quinalphos in green leaf and black tea, at various plucking intervals after spraying during 2017-2018.

Tea is a perennial crop and grown as a monoculture on large contiguous areas. Tea plant is subjected to the attack of several pests such as insects, mites and nematodes. Tea mosquito bug (Helopeltis theivora W.) is one of the serious insect pests of tea in Bangladesh.

Tea is a popular beverage made from the leaves of evergreen shrub Camellia sinensis, family Theaceae. It is an important cash crop as well as exportable commodity in Bangladesh. Tea produced in Bangladesh is exported in the tune of 5 million kg of made tea per annum meeting the internal domestic demand.

The study was undertaken on insect, mite and nematode species diversity in Bangladesh Tea Research Institute (BTRI) main farm, Baraoora and Phulcherra tea estates in Sreemangal, Bangladesh from the period of 2014 to 2015.

An experiment was conducted to evaluate the toxicity of some locally available indigenous plants such as Bishkatali (Polygonum hydropiper), Burweed (Xanthium strumarium), Datura (Datura metel), Lantana (Lantana camara), Mahogani (Swietenia mahagoni) and Neem (Azadirachta indica) at 2.5, 5.0 and 10.0%(w/v) concentrations against red spider mite, Oligonychus coffeae under both laboratory and field conditions at Bangladesh Tea Research Institute, Srimangal, Moulvibazar during 2012–2013.

An experiment was conducted to evaluate some plant origin commercial biopesticides against red spider mite in tea under both in the Entomology Laboratory and main farm of Bangladesh Tea Research Institute (BTRI), Srimangal, Moulvibazar during the period from March 2013 to December 2014.

A study was undertaken to evaluate the field performance and economic analysis of some commonly used insecticides against Tea mosquito bug, Helopeltis theivora Waterhouse at Bangladesh Tea Research Institute (BTRI), Srimangal, Moulvibazar.

The influence of tea mosquito bug (Helopeltis theivora) infestation on the physiological and biochemical changes in tea leaves as well as quality parameters of the made tea was investigated.

An investigation was carried out at the main farm of Bangladesh Tea Research Institute (BTRI), Srimangal, Moulvibazar, Bangladesh during 2005-2009 to find out the influence of weather parameters on the infestation of red spider mite in Bangladesh tea.

Tea (Camellia sinensis L.) is a major cash crop as well as export commodity of Bangladesh meeting almost the entire domestic demand. Tea plants are subjected to the attack of several insect, mites and nematodes. Globally 1034 species of arthropods and 82 species of nematodes are associated with tea plants. Among them, 25 species of insects, 4 species of mites and 10 species of nematodes are recorded from Bangladesh.

Tea, Camellia sinensis (L.) O. Kuntze, is a perennial crop and grown as a monoculture on large contiguous areas. Tea plant is subjected to the attack of several notorious pests such as insects, mites, nematodes, diseases and weeds.

Experiments were carried out to evaluate the toxicity of six botanicals, Bazna (Zanthoxylum rhetsa), Ghora-neem (Melia sempervirens), Hijal (Barringtonia acutangula), Karanja (Pongamia pinnata), Mahogoni (Swietenia mahagoni) and Neem (Azadirachta indica) against red flour beetle, Tribolium castaneum Herbst.

A number of endo- and ectoparasitic nematodes have been found affecting nursery, young, and mature tea (Camellia sinensis) in small, medium, and large plantations in India, Sri Lanka, Bangladesh, China, Japan, Taiwan, Nepal, Kenya, Malawi, Rwanda, Tanzania, and Uganda, Iran, and Turkey.

Tea is a popular health beverage in the world made from the leaves of evergreen shrub Camellia sinensis. Red spider mite is one of the important mite pests of tea causing damage in respect of both quantity and quality.

Tea is a popular beverage made from the leaves of evergreen shrub or tree Camellia sinensis, under the family Theaceae. Tea plant is subjected to the attack of insects, mites, nematodes and some plant pathogenic diseases. Tea production is greatly hindered due to these maladies. About 10-15% crop loss occurred by these pests per annum.

Tea is a popular beverage made from the leaves of evergreen shrub Camellia sinensis, family Theaceae. It is an important cash crop as well as exportable commodity in Bangladesh. The first tea garden of Bangladesh was opened in Chittagong in 1840. Bangladesh tea grows in three fairly divergent ecological zones – namely Surma valley in greater Sylhet, Halda valley in Chittagong and Karatoa valley in Panchagarh.

Tea is an important cash crop of Bangladesh. Panchagarh is the pioneer district of small-scale tea cultivation in the plains. The tea industry of the Panchagarh plains is moving ahead with the district branding slogan of green tea, gateway to the north.