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Posted on 1:25 PM by Wanto and filed under
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Fruit Trees
By Emily Dickson
Most fruit growers agree that trees and bushes should be sprayed with a tar-oil wash in December for it is almost impossible to control aphids in the spring and summer unless this is done. Some omit the tar-oil application every fourth or fifth year in order not to overemphasize the insecticidal control. They then watch carefully that spring and spray with liquid derris or if necessary.
As far as fungus diseases are concerned, there is one which gives particular trouble to apple and pear growers known as scab. I have found little difficulty at the present time in controlling this disease by using an 'organic' fungicide known as Fuclasin or Captan. It is quite a good plan to use one of these washes-first of all when the blossoms have fallen, that is to say just as the little apples or pears are starting to form. It can then be applied again some three weeks later and possibly once more three weeks after that.
The use of the tar oil often encourages the build-up of red spider and here liquid derris should be used and the undersides of the leaves given a thorough soaking.
In my opinion, the use of chemicals should be considered supplementary to environmental resistance. If we ignore the methods for the maintenance of population levels which nature has devised through the aeons of the past, we are treading on dangerous ground. Where man has proceeded on this basis, his actions have often been highly destructive.
It is interesting to report that there has been no case of insect resistance of any practical significance to pyrethrum so far, no matter how frequently it has been used.
Further, no poisonous deposit is accumulated and apples, pears or plums suffer no taint or off-flavor. It is harmless, in fact, like derris, to human beings and animals.
As far as fungus diseases are concerned, there is one which gives particular trouble to apple and pear growers known as scab. I have found little difficulty at the present time in controlling this disease by using an 'organic' fungicide known as Fuclasin or Captan. It is quite a good plan to use one of these washes-first of all when the blossoms have fallen, that is to say just as the little apples or pears are starting to form. It can then be applied again some three weeks later and possibly once more three weeks after that.
The use of the tar oil often encourages the build-up of red spider and here liquid derris should be used and the undersides of the leaves given a thorough soaking.
In my opinion, the use of chemicals should be considered supplementary to environmental resistance. If we ignore the methods for the maintenance of population levels which nature has devised through the aeons of the past, we are treading on dangerous ground. Where man has proceeded on this basis, his actions have often been highly destructive.
It is interesting to report that there has been no case of insect resistance of any practical significance to pyrethrum so far, no matter how frequently it has been used.
Further, no poisonous deposit is accumulated and apples, pears or plums suffer no taint or off-flavor. It is harmless, in fact, like derris, to human beings and animals.
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To plant a fruit tree in your garden, dig a hole larger than the spread out roots and fill it about one third full with 2 parts topsoil and 1 part peat moss.
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