Control of cassava mealybug damage powder pink

How to prevent harmful red flour cassava mealybug

Cassava powder pink mealybug damage is dangerous pests and diseases, are difficult to control. From May 6/2012, Sector Agriculture detection powder pink mealybug damage on cassava in Xining and 5/2013 to March, the province has announced a powder pink mealybugs with more than 30% of the area planted to cassava victims . From 2013 to the present, powder pink mealybugs continue to spread to other provinces such as Dong Nai, Quang Tri, Nghe An, Thanh Hoa, Son La and Dak Lak, Phu Yen ...

Earlier last month 9/2014, Department of Plant Protection Phu Yen has found cassava mealybug damage in powder pink and An Hoa Hai commune (Tuy An district); Cassava is infected with an area of about 94 KM 15ha. Powder pink mealybug pest is dangerous, very difficult to control and are subject to new pest first appeared in our country. Powder pink mealybug potentially spread rapidly through budwood, dispersed in the wind, drift with water, stick on transportation ... and may cause serious damage reduces yield and quality of cassava. Without timely preventive measures, the pest will spread, spread quickly to the cassava area in other localities.

Due to the danger and risk of serious harm of powder pink mealybugs on cassava production in the province, DARD has written proposal DPCs, towns and cities Steering Economics, room agriculture and Rural Development in collaboration with the plant Protection station and Extension census powder pink mealybugs in the area, to identify, assess damage zone of powder pink mealybug management to take measures in time, effective. Training of farmers in cassava area about the dangers and measures to manage care powder pink mealybugs. Tuy An District People's Committee should soon directing and Hoa Hai commune alone with the Plant Protection Station zoning district being a pest, destroying the infected area of cassava mealybugs pink powder severe damage in accordance with the ...

Control measures powder pink mealybug:

When tillage for cassava should be thoroughly destroyed cassava residues, alternative host plants of aphids pink powder. Select budwood uninfected aphids to plant pink powder, must be treated before planting cuttings. Take good care to grow cassava growing, increased resistance to pests. Cassava with reasonable density, adequate fertilization, cassava balance for healthy growth and development increased resistance to aphids. Regular hygiene cassava fields, killing weeds, plant hosts to aphids without residence. Cassava crop rotation with other crops such as beans, rice ... to reduce the risk of powder pink mealybugs. Biological control: Farming and release the parasitic wasp field Anagyrus lopezi De Santis or Epidiocarsis lopezi De Santis to control the pink mealybug damage cassava flour. Protect and take advantage of the insect prey predatory in nature, such as ladybugs, beetles ribs, red bugs ... to control mealybugs pink powder. Evaluating and selecting varieties resistant or tolerant cassava powder pink mealybug, ensure productivity and quality to put on replacement planting cassava varieties infected. Chemical measures: Before planting cuttings must be treated by soaking in water solution for 30 minutes before planting drugs. Use pesticides with active ingredients Thiamethoxam, imidacloprid (4g-phase drug in 20 liters of water) or Dinotefuran (40g mixed in 20 liters of water). Upon detection of harmful red flour cassava mealybugs in the field of dry weather, hot weather, some natural enemies in the field is low, except to spray powder pink mealybugs on cassava infected area and adjacent area which around the minimum range of 30m by the original Thiamethoxam pesticides. Use the recommended concentration and the amount of aqueous spray containing the drug is 600 liters / ha. Can be combined with mineral oil to increase its effectiveness. Chemical sprays should follow the principle of 4 rights and ensure quarantine time recommended on the package.

NGOC AS (general) - Report of Phu Yen, 09/23/2014

Solutions to prevent harm cassava mealybugs pink powder

For the first time the international organization jointly discuss solutions to prevent the destruction of mankind powder pink mealybug (RSBH) damage cassava (manioc) in VN as well as other countries in Southeast Asia.

Pests are warning would cause untold devastation on the level of cassava yield losses up to 82% ... RSBH cause the most damage to wheat plants were discovered in VN from July / 2012 after the outbreak in Thailand (2008) and Cambodia (2009).

This species VN enters mainly through the exchange traded wheat budwood from the border with Cambodia. RSBH are spread attack on many wheat growing areas in our country and Laos, Cambodia, Myanmar, Indonesia ... threatened to devastate wheat growing areas in Southeast Asia.

According to scientists, RSBH capable of spreading rapidly through budwood, spread with the wind, drift with water, stick on the body of animals, people, or the tools, transportation ... so difficult to prevent. When RSBH attack, cassava tops phenomenon and if infected balk at higher densities can do all their leaves. Therefore, the quality and productivity is greatly reduced.

Dr. Kris Wyckhuys, an entomologist at the Center for International Tropical Agriculture (CIAT), said: "Not only in cassava, RSBH species can switch to live on the buds of young rubber trees to damage in the certain conditions. This is a huge risk for a country with an area of rubber plantations as much as VN. Our research shows that the disease has major adverse effects on bread ".

According to Kris Wyckhuys, pest damage has reduced the productivity of cassava in Africa up to 82% (1980). However, it is difficult to assess the precise impact of pests and new diseases, although they reduce yield and crop quality significantly and is spreading rapidly in Southeast Asia.

To address this problem, finding solutions to prevent and tightly controlled RSBH species is a matter of urgency to protect wheat crops in VN as in all areas. Dr. Trinh Xuan Activities, Institute for Plant Protection stressed: "We see pests on cassava as a new and serious problem not only in the country but in the entire region. Therefore, it should have wide knowledge about this pest and research cooperation between countries to address threats to plant trees. "

According to activity, the actual use of chemical pesticides to spray preventing effective RSBH very low at 5% by bugs living in the closed position on cassava. Also, due to bugs with wax and covered with white powder on the drug itself should not stick out into the body and destroy them. Therefore, it is necessary to organize training courses to equip the regional association studies of new knowledge about the threats to cassava and judgment, technical investigation pest management.

Dr. Ngo Quang Vinh, Deputy Director of the Southern Institute of Agricultural Science (IAS) said: "Not only harmful to plant wheat, RSBH also appear on some fruit such as longan, guava, papaya, pineapple ... At this time, mealybugs are the objects most dangerous pests of cassava and the level is extremely harmful.

Experience in Africa shows, the majority RSBH on cassava far has been controlled thanks Anagyruslopezi parasitic wasp, a specialized natural enemies of pests. Also in Thailand since the discovery was first aphids were also quick release and parasitic bees have obtained very high efficiency ".

Dr. Nguyen Xuan Hong, Director of PPD:

"RSBH is subject to insect discovered in 2012 in the wheat VN Xining. Many wheat-growing countries in the region affected by this pest objects. One of the preventive measures most effective sustainable is now using parasitic wasp.

The emerging epidemic must immediately destroy root pathogens. Also closely inspect cuttings, not to spread from the center, guiding farmers to stop by domestic quarantine measures. The parasite's beekeeper to release into the environment will be highly effective, as 90% as in Tay Ninh ".

MINH SANG - Agriculture VN, 11/12/2013