Studies on the composition of insect pest communities on tea crops have
implemented in early 20th century (Du Pasquier, 1932). The composition of natural
enemies on insect pests of tea crops have been studied since late 20th century
(Nguyen Van Thiep, 1998; Le Thi Nhung, 2002; Pham Van Lam et al., 2003, 2005,
2007a, 2007b, 2008, 2011, Pham Van Lam, 2013); however, these studies have not
yet carried out the relationship between predators and their insect pests, and the effect
of environmental factors on this relationship. The application of pesticides, inorganic
fertilizers and plant growth regulators in tea pest management has been steadily
increased and play an essential method of tea growers. Not only does overuse of
insecticides kill tea pests, but also promote the appearance of other dangerous insect
pests, some minor pests could be a dramatic increase in population and become major
pests declining the abundance of natural enemies. VietGAP (Vietnam Good
Agriculture Practice) standard on tea trees was started firstly in 2008 and regulated
that the application of Integrated Pest Management (IPM) and Integrated Crop
Management (ICM) are prioritized, especially recommendedbiological. Based on
scientific literature review and current tea growing issues, this study was
implemented with the title “A study of species composition and relationship of
predatory insects with insect pests on tea in Phu Tho, and effects of some ecological
factors on their occurrence”.
