In the past 10 years, the Brown
planthopper (BPH) was considered one of the minor pests in rice but more
recently it has become one of the most serious. This is due to the misuse of pesticides
during early-season spraying of rice in the field.
Nowadays, farmers use a lot of pesticides
to control leaf-eating insects during early-season spraying. Natural enemies
of BPH such as lady beetles, spiders and wasps are also affected by these pesticides.
As a result, farmers are faced with BPH problems that can cause yield losses
of 30-100%. Furthermore, BPH is also a vector of ragged stunt virus and
grassy stunt virus diseases in rice. BPH is difficult to control effectively because
it is spread easily by wind and has a short developmental period. If a wide
variety of natural enemies are available in rice fields, these natural
enemies can control 80% of BPH and reduce the resulting hopper burn.
Don’t use any insecticide
within 40DAS/DAT (for leaf folder in rice). If you use pesticides in the
early season, it is like bombing your own army yourself. There is no need to
worry about yield loss early on because the plant can compensate in time. And
your plants become tolerant of other pest problems.
- Grow plants that are
attractive for natural enemies on the boundary. These include white &
yellow flowering plants which act as shelter for natural enemies. Food and
shelter are essential things for every living thing. If you have a field rich
in natural enemies, they will help to control the BPH.
DAS: days after sowing
DAT: days after