147 
potato-beetle, treated on pages 141-143, damages tomatoes soon 
after transplanting to the field. 
The Stalk-borer 
Fapaipenia nitcla Giien. 
(Hydrcccia nitela, Gortyna nitcla) 
This borer, or "heart worm," as it is often called by corn grow- 
ers, was found destructive to tomato and corn, and occasionally to 
potato, in a number of restricted areas during the past year. Other 
vegetables known to be injured by it are rhubarb, spinach, cauliflower, 
eggplant, and pepper. 
The presence of this caterpillar in the tomato plant is indicated 
by the wilting or death and final breaking down of the top, and by 
the presence of a round hole in the side of the stalk, from which a 
Fig. 40. Stalk-borer, Papaipcina nitcla: a, adult; b. half-grown 
larva ; c, mature larva in burrow ; d, side of one of its 
segments ; c, pupa. Slightly enlarged. 
brownish excrement is oozing. Upon careful examination of plants 
so injured a peculiarly striped larva (Fig. 40, h) will usually be 
found in the stalk. The following description is quoted from Pro- 
fessor Forbes.* 
The larva may be readily recognized "by the peculiar break in 
the striping of the body at the middle * * * [Fig- 40, h^ giv- 
ing it an appearance as if it had been pinched or injured there. It is 
*Twenty-third Rep. State Ent. Ill, pp. 44, 45. 
