Dong Yaw-Jen

11 Questions 1 Answers 0 Followers

Questions related from Dong Yaw-Jen

How to evaluate the value of lady beetle in regulate crops pests population?

Hello everyone, I am currently conducting an investigation on lady beetle species and their populations in conventional and organic rice fields. I found that Micraspis discolor was more abundant...

09 September 2024 8,883 1 View

Do anyone know the effective essential oils could repel Agromyzidae Tropicomyia leafminer?

Tropicomyia passiflorella is a serious passion fruit pest in Taiwan. Owing to no insecticide control, I want to screen some effective essential oils that could repel this pest to damage passion...

24 February 2021 4,804 6 View

Light wavelength attracting pest natural enemies?

Now I am interesting in if any kind of light wavelength could usefully attract pests natural enemies like lady beetle, predatory bugs, hover fly, lacewing, or parasitoids. Could any one could...

07 November 2017 2,732 3 View

Does anyone know if cucumber infected with cotton aphid could release methyl salicylate ?

Methyl salicylate has been known to release by many plants when infected with different insects, cucumber when infected with mite also releases methyl salicylate, does any paper cited that when...

02 August 2016 10,018 3 View

Is there a difference between alate and apterous aphid host preference?

I have compared host selection of alate and apterous cotton aphid. Results showed some differences between alate and apterous cotton aphid. Does other aphid also showed different host preference...

13 October 2015 1,995 8 View

Does any one know any volatile could repel Tessaratoma papillosa?

Tessaratoma papillosa is a serious pest in Taiwan litchi orchard, beside pesticide and biological control, any volatile could use to repel this pest?

20 May 2015 3,460 2 View

Does plant pose constitute defense could also pose induced defense?

Now I research on select useful cucumber cultivars to control cotton aphid to reduce using pesticide, I don't know constitute or induced plant defense is better, or plant could also has two kind...

23 April 2015 7,230 2 View

Is Thrips dangerous for Prunus Mume?

Now I detect beneficial insects in Prunus Mume field, I found many Orius spp., I also found Thrips in Prunus Mume bloom, I don't know if Thrips are serious pests for Prunus Mume, could anyone give...

17 April 2015 3,816 2 View

Does anyone know what kind of substance could induce cucumber defense cotton aphid?

Up until now I have focused on non-chemical control methods for cotton aphid, induced defense may be a safe and useful method, but I don't know what kind of substance could induce cucumber defense...

27 October 2014 153 1 View

Does anyone know the economic threshold of the cotton aphid on cucumber?

I am using some plant strengtheners on cucumber in order to evaluate cotton aphid population development. The addition of plant strengthener could reduce cotton aphid populations, but I don't know...

16 October 2014 4,609 4 View

Does anyone have an easy method to measure silicon content in plants?

Now I use sodium silicate to treat cucumber to control aphid, I want to know silicon content difference between treatment and control.

26 June 2014 9,682 3 View