Questions from Biodiversity Department of Harvard and Answers from VN

Rod Eastwood, Prof., Biodiversity Department of Harvard University

Quy Chau Hoang, Vietnamese Bio-researcher 

Dear Mr. Rod Eastwood

Thank you for your mail. I would like to answer your questions as follows: My theory in producing HTD and HTG is: To change and orient the bio-interaction on natural organic agro-materials in order to improve the ecological imbalance caused by overusing plant protection chemicals in agriculture over the world.
Our products are manufactured with 8 types (brown liquid) of HTD and 01 type (brown powder) of HTG those are used for several crops.
HTD is used by spraying on the leaves. HTG is used for roots and soil improvement.
– Is HTD used mostly for promoting healthy plant growth, or do many people also use it to control insect pests?
– Can you tell me how the HTD spray reduces insect pests?
When spraying HTD on the leaves at any dose (without toxic), HTD will help plants to improve its growth and development while reducing harmful factors such as insects and diseases in/on soil.Why?
HTD is used as special nutrition to plants.
For insects, HTD is used as an agent to reverse feeling of adult insects. For harmful fungi and bacteria, HTD changes their living enviroment and create biological resistance in a large scale.
– Does the HTD spray kill the insect pests, or does it have some other long lasting or permanent effect on the insect pests? Could you please explain?
No, HTD doesn’t kill insects but regularly using HTD will make a balance for the ecology and avoid generating new biotype insects.
– What is the active ingredient of HTD?
HTD& HTG include a wide range of helpful bacteria, a system of interactive enzymes and bio-buffer that has full effect.
– What are the advantages of using HTD to control insect pests instead of an insecticide?
HTD is not toxic and do not harm to enviroment and users. They are odorless, effective costs and they have a highly bio-safety.Therefore, many people like to use them without any protective clothes.
– Is it economical to use HTD instead of an insecticide (does it cost less)?
Yes, it does. According to result of 5 ha rice field in Duc Hoa district –Long An province in Dong Xuan 2011 which used HTD and HTG costs 6,081,500 VNĐ/ha instead of 7,288,500 VNĐ/ha ( using insecticide) and farmers got the productivity of 8 tons/ha instead of 5-6 tons/ha when using insecticide.
– Do you have any data from other experiments using HTD to control insects?
From unpublished data in Vietnam, you could see it on, keyword: quychau54.
Other testing data from An Khe Plant Protection Department in Gia Lai province and testing in Cho Gao district (Tien Giang province) since 2008. Besides, you could search information with Vietnamese keywords like “chất hữu cơ sinh học HTD”, “Cứu chữa cây vú sữa tại Tiền Giang” .
University of Agriculture and Forestryof Ho Chi Minh City is implementing small-scale experiments:
On forest trees:the experimenter is Vu Thi Nga, Master.
On agricultural crops: the experimenter is Pham Thi Minh Tam, PhD.
– Do you have any promotion/technical material for HTD/HTG in English that you could send me?
No, because there are new products those we have just applied in domestic market.
– Was the HTD/HTG treatment developed locally?
Yes, Our HTD and HTG products treatment has been developed locally.
– Are there many people using the HTD/HTG treatment in Vietnam?
Yes, there are. Since end of 2008, VN authorities and farmers have known HTD and HTG treatment on several crops as: vegetables( spicy leaves, chili, …), fruits (orange, durian, milk fruit or star fruit, longan, acerola, guave..), rice, coffee (green) tea, pepper…
If you have any question more, please don’t hesitate to contact me.
Thank you and truly yours,
Quy Chau

Dear Mr. Rod Eastwood
First of all, thanks a lot when you are interested in our Hi-tek Ground (HTG) and Hi-tek Development (HTD) products. To answer your next questions, I hope you understand that I am not a plant pathologist but a plant physiologist. So I‘ve just recorded the unpredictable results on fields experiment and in my small tests. However, when you explain some the following questions, I think you will understand what I said in my last email.
1. Why does a butterfly species spawns only on a certain plant but not all plants?
2. Why aphids spawn and damage the rice plant only but not on weeds, although both plants species might be the same family.
3. Snails often damages lettuce crops, why they don’t harm same lettuce family?
4. When does nematode damage roots? Why?
5. When using beneficial microorganism with high density on a large scale on a certain plant, do they affect the living environment of pathogenic microorganism?
I always think of Power of the Nature Mother, those are: mass of bio-balance, complex bio-interactives, and it be the giant laboratory to me and you.
The last mail, I wrote a wrong Ms. Nga’s degree. She is PhD since 2006. Sorry!!!.
Truly yours,

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