In the 2018-19 agricultural campaign, Mozambique lost
over 40,000 hectares of cultivated land because of the abuse of pesticides in
the attempt to control insect pests. Interviewed by the Portuguese news agency
Lusa, Aderito Lazaro of the Plant Health Department in the Ministry of
Agriculture, said “the use of chemicals should be a last resort. However, at
the first sign of a pest, the producers grab their pesticides, and one of the
mistakes is that they use the same substance repeatedly. They should rotate”.
Lazaro cited the case of Boane district, 30 kilometres
west of Maputo, where farmers had doubled the amount of pesticides used per
week – without getting rid of the pests damaging the maize crop. Insects are
showing signs of resistance to pesticides throughout the country.
The Agriculture Ministry, in partnership with the United
Nations Food and Agriculture Organisation (FAO), has publicised methods to
handle pests through an integrated range of measures, including not only
conventional insecticides, but also biological pesticides and improved seed. Meanwhile,
a new pest is threatening banana growers in Chokwe district, in the Limpopo
valley. This is the banana bunchy top virus (BBTV). To prevent the spread of
the virus the authorities are destroying infected banana trees in several
plantations. “This virus is lethal, and regardless of whether we cut the trees
down or not, they will die”, said Celso Rufasse, coordinator of the BBTV
project, cited by the independent daily “O Pais”.
“If we don’t cut the trees down, there will be a greater
dispersal of the disease”, he continued. “The goal is to avoid the spread of
the virus, so that we can eradicate the disease”.
Destroying the infected plants began a month ago, and so
far almost 30,000 banana trees have been cut down in Chokwe. There is ban in
place on the movement of bananas from Chokwe to elsewhere in the country. The
elimination of infected plants is budgeted at 20 million meticais (about
323,000 US dollars), and this task is receiving assistance from South Africa
and the United States. The virus is transmitted plant to plant by banana
aphids. The virus damages the cells of the host plant, and usually prevents it
from producing fruit. Any fruit that is produced is likely to be deformed. Since
there are no varieties of banana that are resistant to the virus, the only ways
to eliminate the disease are to control the aphids, or to remove and destroy
infected plants before the virus spreads.
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