On hogs that can he reflooded. — Flood for ten hours as soon as the net count 

 (see page 3) shows it is necessary. 



SPRAYING OR DUSTING 



Spraying with lead arsenate is a standard control in the South. Dust with a 

 10 percent DDT dust, 50 pounds to the acre. 



BAITING — See page 26. 



SPANWORMS 



These insects, known also as loopers and inchworms, have a striking way of 

 crawling. They stretch out at full length, take hold with the front legs, 

 and then bring forward the hind end close to the front pairs of feet, the body 

 between bending well up out of the way. This habit is due to the lack of 

 several legs that other caterpillars have to support the middle of the body. The 

 hind part has only two pairs of legs. 



These worms are more slender than most caterpillars. They are hairless 

 and feed openly, never sewing leaves together. When disturbed they cling to 

 their support by the hind pairs of legs and remain straight and motionless. 

 As they usually are colored to harmonize with their habitual surroundings and 

 often resemble short or broken twigs, this habit tends to save them from their 

 enemies. 



These insects commonly attack bogs here and there in Massachusetts, but 

 have rarely been reported as doing so elsewhere. The kinds seen most on the 

 bogs may be distinguished by the following table: 



Body mostly pale yellowish or pinkish, with a reddish 



herringbone stripe along the back Eupithecia miserulata Gr.-^^ 



Body mostly yellow chain'spotted geometer (p. 44). 



Body mostly green green cranberry spanworm (p. 38). 



Body mostly brown or gray _ ~ - 1 



1. With a row of conspicuous irregular reddish'yellow 



spots along each side .- half'winged geometer.33 



Not thus marked _ 2 



2. With a pan' of noticeable tubercles a little way from 



the middle of the back _ 3 



Without such tubercles brown cranberry spanworm (p. 39). 



3. The tubercles in front of the middle of the back cotton spanworm (p. 42) 



The tubercles behind the middle of the back — big cranberry spanworm (p. 43). 



The green cranberry spanworm and the brown cranberry spanworm are far 

 more important pests than the others, and when either of them becomes prevalent 

 it usually stays with the bog year after year till it is treated. They seem never 

 to harm dry bogs much. They attack mostly bogs flowed during the winter 

 and not reflooded much in June. If they are once thoroughly eliminated from 

 a bog, their presence in destructive abundance need not be feared again for 

 several years. Growers should know the moths of these two species, for their 

 abundance indicates coming trouble. 



33 An unimportant worm that often eats into the green berries and into meadow beauty- 

 flower buds. 



33 Phigalia titea (Cramer). An unimportant worm, nearly an inch and a half long 

 when mature, rather common in late \May and the first half of June on dry bogs and bogs 

 that are not reflooded. It also attacks swamp blueberry, apple, beech, birch, cherry, maple, rose, 

 and elm. Mass. Agr. Expt. Sta. Bui. 339:36, 1937. 



(36} 



