Application of ultra-low-volume malathion by air-assisted ground sprayer for boll weevil (Coleoptera: Curculionidae) control

被引:11
作者
Mulrooney, JE
Howard, KD
Hanks, JE
Jones, RG
机构
[1] Applic. and Prod. Technol. Res. Unit, USDA-ARS, Stoneville
[2] USDA-APHIS, Mississippi State, MS 39762
关键词
Anthonomus grandis grandis; malathion; ultra-low-volume application; air-assisted ground sprayer;
D O I
10.1093/jee/90.2.639
中图分类号
Q96 [昆虫学];
学科分类号
摘要
During 1994 and 1995, test of ultra-low-volume applications of insecticides conducted on cotton, Gossypium hirsutum L., at Stonealle, MS, evaluated the effectiveness of malathion applied with a new technology in ground application, the air-assisted ultra-low-volume ground sprayer. Two tests conducted in 1994 determined the effectiveness of ultralow-volume applications of malathion (91%) with and without cottonseed oil and established effective malathion rates against boil weevils, Anthonomus grandis grandis Boheman. An emulsifiable concentrate (EC) formulation of azinphosmethyl was used as a standard. In 1995, ultra-low-volume malathion (95%) was applied at 1.36 and 1.02 kg (AI)/ha plus cottonseed oil in a total volume of 1.17 liter/ha. These treatments were compared with a 1.12 kg (AI)/ha rate of an EC formulation of malathion applied with water in a total volume of 46.8 liter/ha. In the 1994 insecticide comparison test, ultra-low-volume malathion treatments resulted in 70% mortality throughout the 48-h test period whereas mortality from the azinphosmethyl standard steadily decreased from 71% at 4 h after treatment to 12% at 48 h after treatment. In the 1994 malathion rate test, 1.30 and 0.98 kg (AI)/ha produced mortalities comparable to those of azinphosmethyl at 0.28 kg (AI)/ha. In 1995, 48-h mortalities at 24 and 48 h after treatment were highest for the rate at 1.36 kg (AI)/ha (99 and 90%, respectively), followed by the rate at 1.02 kg (AI)/ha (78 and 54%, respectively), and lowest in the EC formulation treatment (28 and 21%, respectively). There were no differences in mortality at 72 h after treatment. The air-assisted ground sprayer permitted application of insecticides at considerably lower volumes than a conventional hydraulic ground sprayer and also permitted a reduction in the current rate of ultra-low-volume malathion required for effective boil weevil control.
引用
收藏
页码:639 / 645
页数:7
相关论文
共 16 条
[1]  
[Anonymous], [No title captured]
[2]   JOHNSONGRASS (SORGHUM-HALEPENSE) CONTROL WITH HERBICIDES IN OIL DILUENTS [J].
BARRENTINE, WL ;
MCWHORTER, CG .
WEED SCIENCE, 1988, 36 (01) :102-110
[3]  
CALRTON JB, 1992, 921618 ASAE
[4]  
CHAMBERS GV, 1992, AM SOC TEST MATER, V1112, P218, DOI 10.1520/STP16884S
[5]  
CREASE GJ, 1985, BRIT CROP PROTECTION, V28, P251
[6]  
Ford M. G., 1987, PESTICIDES PLANT SUR, P26
[7]   VARIABLES AFFECTING THE USE OF POSITIVE DISPLACEMENT PUMPS TO APPLY HERBICIDES IN ULTRALOW VOLUME [J].
HANKS, JE ;
MCWHORTER, CG .
WEED TECHNOLOGY, 1991, 5 (01) :111-116
[8]  
MCDANIEL SG, 1980, P BELTWIDE COTTON PR, P76
[9]   INTERCEPTION AND PERSISTENCE OF PARATHION AND FENVALERATE ON COTTON PLANTS AS A FUNCTION OF APPLICATION METHOD [J].
MCDOWELL, LL ;
WILLIS, GH ;
SOUTHWICK, LM ;
SMITH, S .
PESTICIDE SCIENCE, 1991, 33 (03) :271-279
[10]  
OCHOU G, 1986, SOUTHWEST ENTOMOL S, V11, P63