132 STATE HORTICULTURAL SOCIETY. 



Question: How strong' do you use it? 



Ans. About one to eii^lit hundred. 



Q. I usually spray for plant lice before this time, is it not too late 

 to spray for them after the buds show pink? 



A. You could kill them just as well at this time as before. 



Q. Can we sprav at a certain time, or must we wait until we see the 

 lice? 



A. You want to spray as soon as the eggs are hatched. Any time 

 after they have hatched befoi*e the blossoms have opened it's alright. 

 You don't have a very long time, but you have -long enough — several 

 days 



Q. Are Dilute Lime and KSulphur combined with this? 



A, Just as you choose. 



Q. Do you use soaji with this spray? 



A. If using it alone for the red bug, I would add soap, but if for the 

 combination, I would leave the soap out. The soap is to make the spray 

 spread better. 



Q. How about using it wiih Bordeaux mixture? 



A. It would take a chemist to answer that. Nicotine breaks down 

 Very easily and I don't know what would be the effect with Bordeaux. 



Q. How much soap do you use? 



A. iQine i)ound of Black Leaf, 40 to 800 gallons of water, and about 

 four pounds of soap. 



Q. Is the lady bug the natural enemy of these pests? And is it 

 harmed by these sprays? 



A. Yes, the lady bug is the enemy of these bugs, and it is not hurt 

 by the s])rays mentioned, as it comes through the winter in the adult 

 and can fl^'. 



Q. (Van we not find some way to encourage the lady bug? 



A. I do not know of any practical way. In California they have 

 •found ])ockets in the mouniains that are full of these insects spending 

 the winter, l)ut in Michigan we are not blessed with any mountains and 

 I don't know how we could encourage them to any great extent. 



Q. Then you Avouldn't think that it would be possible for us to 

 attempt it here in Michigan? 



A. I don't think you would meet with any great success. Of course 

 they didn't think they could in California either though until they tried. 



The main control of plant lice is a little microsocopic creature which 

 preys on the lice called Lysiphlebus. The reason that we have been 

 bothered to such a great extent by plant lice for the last three years, 

 is that we have had cold, wet springs for three years and the plant lice 

 have got too big a start before these little parasites could get hatched. 

 If Ave had nice Avarm springs for a couple of years, you Avould see a big 

 improvement in this regard. 



The Grape Leaf Ho])per is only destroyed by burning the rubbish and 

 all refuse matter in the fall after the Aveather gets cold. This should 

 have been done before this. Thev hide in the rubbish, and if this is 

 carefully burned, they can be easily destroyed in this way. Burn all rub 

 bish that is in the fence corners and around the vineyards, and you Avill 

 notice a big improvement next year. 



Q. Can you tell us hoAv to detect the eggs of the lice and Avhat they 

 do to apples to cause them to be so small ? 



