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A 5-percent chlordane at 25 to 30 pounds per acre, applied 3 times 
permitted 2 percent of Black HSye pea pods to "be infested as compared to 
15.6 percent in the check.— Wene (422). 
Conotrachelus nenuphar (Host.), the plum curculio 
Chlordane in the form of wettable powder, emulsion, and dust has "been 
tested for the control of the plum curculio in Georgia by Snapp (428, 429 ). 
and Savage and Cowart (402); in Illinois by Powell et al. ( 372 . 222), 
Chandler (70-75 ). and Weinman (487): in Indiana by Marshall ( 315-317 ). and 
Purdue Univ. ( 376 . 378 ): in Kentucky by Ritcher and Armstrong ( 397 . 257): 
in New Jersey by Driggers and Darley ( 114 ): in New York by Dean ( lOO ). and 
Dewey and Van Geluwe ( 102 ) ; in Pennsylvania by Cox (85j ; and in Virginia 
by Bobb Q8) , Bobb and Grayson (40) , and Hough (226 ) . 
In general these tests have yielded promising results when 1 pound of 
chlordane per 100 gallons of water was applied. Chlordane appears super- 
ior to lead arsenate, but inferior to benzene hexachloride. Damage to 
peach foliage and fruit in Virginia by the application of a 40-percent 
chlordane wettable powder has been reported by Hough (226), but other 
workers report no injury. 
In Ohio in 1949 cage tests involving a study of the speed of knockdown, 
lethal action, and residual toxicity of 13 organic insecticides to plum 
curculio were conducted. Treated peach foliage was exposed to adult cur- 
culios at aging intervals of 0, 5, and 10 days under insectary conditions 
and at 10 days under orchard conditions. The insecticides may be arranged 
in order of their decreasing speed of knockdown as follows: parathion, 
ethyl o-nitrophenyl thionobenzene phosphonate, ethyl p.-nitrophenyl thiono- 
benzenephosrshonate, tetraethyl pyrophosphate, aldrin, heptachlor, chlordane, 
dieldrin, toxaphene, 2-nitro-l,l,bis(p-chlorophenyl) benzene, technical 
benzene hexachloride, refined benzene hexachloride, and DDT. — Rings ( 393 ,) * 
Cylas formicarius elegantulus (Sum.), the sweetpotato weevil 
In the form of bait (40 parts ground sweetpotato to 1 part insecticide) 
chlordane formulations (48-percent emulsion, 50-percent powder and undiluted) 
gave 7 day mortalities of 88, 90, and 76 percent. Applied as a dust 2-per- 
cent chlordane caused 97 percent and 25 percent chlordane caused 100 percent 
mortality but also caused some foliage injury when applied to plants in the 
greenhouse. — Harrison ( 206 ) . 
Tests made in Louisiana in 1948 showed that calcium arsenate applied 
weekly reduced the infestation of potatoes by the sweetpotato weevil to 1.6 
percent; chlordane applied in the soil at planting time at the rate of 5 
pounds per acre reduced the infestation to 1 percent; and chlordane in the 
soil followed by the calcium arsenate treatments at weekly intervals reduced 
the infestation to 0.2 percent. The potatoes in untreated plots averaged 
approximately 10 percent infestation. Chlordane did not adversely affect 
the flavor of the sweet potatoes. — Floyd and Smith (l45_) . 
Hypera postica (Gyll), the alfalfa weevil 
Adult alfalfa weevils were killed by chlordejie (3/4 or 1 pound per 
acre) applied for the control of grasshoppers. — Severin (414) . 
