With
the progress of the urbanization and the promotion of land circulation,
large-scale cultivation is in rapid development, which simultaneously brings
some new problems to the control of diseases and pests, according to Insecticides China
News issued by CCM in November.
At
present, either land circulation or scale cultivation in most places is still
in its initial stage, which has two characteristics:
Firstly,
different farmers plant the same crop repeatedly in an area. Local government
focuses more on policy support on land circulation than on technical support
and training for farmers. This pattern of planting (plant the same crop
repeatedly) brings more soil-borne pest infestation. With poor technical management
and low pest control level, abuse of highly toxic pesticides becomes more
severe.
Secondly,
the farmland owned by a single farmer is still very small and farmers have weak
purchasing power, slowing down the application process of large agricultural machinery.
Thus, it is difficult to deal with outbreaks of diseases and pests.
In
the promotion and implementation process of large-scale cultivation, the
government, agricultural dealers and farmers should pay more attention to
ecological risk factors besides the economic benefits, so that the risks can be
controlled.
In
late June, farmers in Hebei Province suffered a big loss in one production base
repeatedly planting radish for many years. The pest caused lots of crooked
holes on the surface of radishes, and after 24 hours, they began to rot. The
damage rate exceeds 30%. Farmers used more pesticides, but the pest still
caused serious yield losses.
According
to the Mr. Lei from Chinese Academy of Agricultural Sciences, the pest is
striped flea beetle, whose larvae feed on the roots of cruciferous crops. It is
serious in Southern China such as Guangdong, Fujian, while in Northern China,
it is not a major pest. The outbreak of this pest in radish this year is mainly
due to the reasons as follows:
For
one thing, with continuous years of planting radish repeatedly, a large number
of population accumulated in radish residue around the farm.
Upon investigation, the longer the radish is cultivated in the same area, the
more serious damage of striped flea beetle is. Cleaning up radish residues in
field and roadside is not only conducive to the environment protection but also
the basic measure for controlling the pest. However, it is not easy to practice
for one or two farmers.
For
another, the rainy weather in late spring of this year was fertile to the
propagation of striped flea beetle. Besides, during the growth of radish,
farmers did not know how to control it at all and local farmers usually used
little pesticides, there was no timely control for striped flea beetle,
resulting in damage to larger area.
In
Hebei Province, sweet potato planting area is increasing due to the land
transfer contract, while the Pleonomus canaliculatus damage is
becoming serious with the expansion and continuation of sweet potato planting
area.
In
order to maximally guarantee the normal grow and business income of sweet
potato, farmers widely used highly toxic pesticides such as terbufos, aldicarb
and phorate. Meanwhile, some pesticide dealers does not recommend other
pesticides, they try various ways to sell pesticides which farmers want to buy.
The
risk of large-scale cultivation is much greater in some cases, when farmers
face pest damage; they purchase pesticides that they think are good enough. As
pesticide dealers, it is necessary to help farmers solve technical problems.
In
August 2012, armyworm in the corn planting area of Northeast China broke out,
leading to tremendous influence on the growth of corn. Owing to the large
planting area with the corn height of more than 1.5m, how to effectively spray
pesticides has become an urgent problem.
Finally,
spraying using aircraft and elevated sprayer quickly took control of the
armyworm infestation. However, lack of access to improved spraying equipment in
some field led to huge losses.
Armyworm
are migratory pests, timely control should be assured as soon as strong
outbreak, large-scale cultivation of corn needs quick and timely availability
of pesticides for the control. The outbreak and control of armyworm in
Northeast China indicated that spraying equipment and pests monitoring should
match large-scale cultivation.
Development
of market economy is driven by market demand, large-scale cultivation in China
will inevitably push its agriculture development. Problems emerge during this
process are, at the same time, the market demand opportunities. Agricultural
manufacturers and distributors at all levels should closely pay attention to
such opportunities to grow with the market and strengthen themselves.
This
article is written by Zhao Zhanzhou, a senior agronomist from Beijing Zhongbao
Lvnong High-tech Co., Ltd., a subsidiary of Institute of Plant Protection (IPP)
Chinese Academy of Agricultural Sciences (CAAS).
Table of Contents of Insecticides
China News 1311:
Lianyungang
Hetian becomes third domestic company to obtain flufenoxuron TC registration
Sinochem
to become new controller of Yangnong Group
Risk
in using leads to uncertain future of YC
Highly
toxic pesticides with restriction for use to end in China
Terbufos
to completely withdraw from the Chinese market on 31 Oct. 2013
New
pest control problems emerge in large-scale cultivation
Fipronil+chlorpyrifos:
new pesticide to control soil pests of peanut
China's
export volum of emamectin benzoate soars in H1 2013
China's
export volume of acephate technical increases 12.15% in H1 2013
China's
export volume of acetamiprid technical hits 1,106 tonnes in Jan.to August 2013
Eucalyptus
diseases and insects happen in Guangdong
Insecticides
China
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