No. 6. DEPARTMENT OF AGRICULTURE. 641 



A third and still quicker and therefore more economical method 

 is to simply place the netting loosely and unsupported over the 

 plants and fasten it down with the loose earth. It should be pulled 

 up at the middle once about every three days in order to relieve the 

 pressure on the plants,but if it does not rain on the earth and fasten 

 it down the plants will exert sufficient pressure to support the net- 

 ting for themselves. After a few weeks it can be removed and 

 stored for another year. This method appears almost as effective 

 as any, and we have tried all. (Fig. 40.) 



2. The Paper Tent. 



We have recently devised and tested this "tent" and consider it 

 effective for all kinds of insects on plant® small enough to be tightly 

 covered by it. We used large sheets of brown paper thirty by thirty- 

 six inches, procured at a newspaper office. Each is folded twice to 

 make a block of four sheets one-fourth the original size. Then a 

 diagonal fold is made from the corner that was the center across to 

 the farthest corner. (See 111. Xo. 41.) When this is properly un- 

 folded and partially spread it will stand upright like a tent. About 

 two tablespoonfulls of carbon bisulphide are poured on the ground 

 around the plants in the hill and the paper tent is quickly placed over 

 them and its edges covered with earth. Two persons can place one 

 hundred tents in an hour, and by that time every living insect (except 

 the borers) will be killed under the first that were placed and the 

 workmen can commence to cover other plants with them. Carbon bi- 

 sulphide and calcium carbide are especially effective when properly 

 used with this device. It can be used" over any and all kinds of plants 

 that it will cover and the insects thereon will be killed, no matter 

 what species, and the plants will not be injured. It is here described 

 for the first time. If larger plants are to be treated two or more 

 sheets may be pasted together. They can be stored in tight boxes 

 away from mice and kept in use for many years. (111. 41.) 



3. The Tarred Board. (111. Xo. 42.) 



This device is a modification of the tarred cloth and for some 

 reasons is preferable. Thin boards are nailed on a cross pole in such 

 a way as to give a flat surface about thirty inches wide by forty 

 inches long. Over the broad board thus made tar or pitch is to be 

 smeared. When a person carries this tar board by the pole or han- 

 dle with the tarred side toward jilants and another person from the 

 windward side of the row brushes insects toward it they strike it and 

 are killed by thousands. It can be operated successfully by one per- 

 son. (Fig. 43.) 



This is especially recommended for thrips, flea-beetles, striped 

 cucumber beetles and plant lice. It can be used to advantage for 



