Black bean insecticide from oilseed seeds

For 20 years, black beans have been attacking 'houses' in many places in Binh Duong province. Until recently, there was only a special medication for this bug, made by the Ho Chi Minh City Institute of Applied Materials Science, from seeds of oil plants.

For nearly 20 years now, in Tan Hiep commune, Phu Giao district, Binh Duong province, on peak days, black beetles have been covered from the ceiling, walls, objects . and filled houses. Every 30 minutes, one scan is required. Every activity of cooking, eating and sleeping . must be brought out to the garden. According to many households here, black beetles produce a very unpleasant smell. If this substance gets into the skin, it will blister like a fire.

'Burning the house' still does not escape

Long Binh Secondary School, Long Nguyen Commune, Ben Cat District, Binh Duong Province has 10 rooms, all were attacked by black beetles. Many days, the school had to move the tables and chairs out to study because the bugs were covered with tables and chairs. Not to mention the bad smell, they also bring more ticks that cause itching. Someone had to . burn the house, move the furniture to another place, still being attacked by this insect.

Black bean herbicide is plant-based.Photo: Thai Ngoc

"Tri is not over, many people think this is a spooky affair, so invite a teacher, shop for offerings" , a farmer from Lai Uyen commune, Ben Cat district reflected. In Long Nguyen commune, there are more than 2,000 households, more than 50 households have been attacked by black beans. Most of these households are near the rubber garden.

According to knowledgeable people, Black Beetle larvae live mainly under the leaves of rubber gardens. At the beginning of the rainy season and especially the bright moon nights is the time of black bean beetle breeding. During this period, they flew all the way to the people's houses and brought with them aggressive chemicals to attract people and save the smell. Therefore, any house that has "sticky" is considered to be finished, even if it is . burning the house, the household still has the smell of black beans, so when they build a new house or move to another place, the following year they still follow the smell. but come to.

Kill the root

To kill this cow, people sprayed pesticides but also did not have high efficiency. In addition, the bad smell of drugs also affects people and animals. Stemming from this fact, Binh Duong Department of Science and Technology has ordered the Ho Chi Minh City Institute of Applied Materials Science to study blackpea cure medicine.

People are spraying insecticide.

Dr. Ho Son Lam said, this drug has an oil content of 10-40% and 1% of bioactive substances. After many months, Assoc. Prof. Dr. Lam and colleagues here studied 6 drug samples. Through testing, three of the 6 samples showed the best results, ie killing black beans to 85% after 1 hour of spraying. Production costs about 6,000 VND / 100ml and can be mixed with 5-6 liters of water when used.

The characteristic of this drug is to paralyze the black bean's nervous system. In particular, thanks to the addition of nano-structured metal oxide systems such as silver, titanium, copper to the drug, it also has a deodorizing effect. Thanks to that, the next time the black beans didn't find the smell to come. In addition, black beetles are also easily attracted by the smell of medicines because the ingredients with attractants are essential oils.

'After spraying with this biological origin, the family still lives normally. Black beans are no longer coming back, ' said Nguyen Van Cai, Ba Must hamlet, Long Nguyen commune, Phu Giao district, Binh Duong.

Experimental results of rat poison on drugs by the Department of Clinical Pharmacology, Ho Chi Minh City University of Medicine and Pharmacy, showed that the drug is not toxic to humans.