摘要:

Collections of male tobacco horn worms,Manduca sexta(L.), in blacklight (BL) traps can be increased 10 or more times by baiting the traps with virgin female moths (Hoffman et al. 1966, Cantelo and Smith 1971). However. the rearing of these females is expensive and time consuming, and a synthetic female pheromone is not available. Therefore, we hoped to find a substitute material that could be used to increase collections. Isoamyl salicylate was chosen for evaluation because when it was used to bait relatively inefficient screen traps in Tennessee, it caught as many as 925 tobacco hornworms in a season. Also, 16 other species of sphingids were caught, but onlyByles lineata(F.) andXylophanes tersa(L.) were caught “in numbers” (Morgan and Lyon 1928). Moreover, at Oxford, N. C., collections in 12 similar-type traps (Stahl 1954) baited with isoamyl salicylate plus simulated jimson weed flowers averaged 112M. sextaand 155 tomato hornworms,M. quinquemaculata(Haworth), each year from 1942 through 1953 with peak yearly collections of 414M. sextaand 218M. quinquemaculata. (However, in 1949, unbaited BL traps collected 15 × as many hornworm moths (both species) and in 1952–53 7–9× as many as the baited screen traps.)

ISSN:1754-5692    

DOI:10.1093/ee/1.5.674

出版商:Oxford University Press    

年代:1972

数据来源: OUP

摘要:

Various sticky substances have been commonly used to immobilize males attracted to traps baited with lepidopteran female sex pheromones. However, Sharma et al. (1971) found that 2 designs of sticky traps were inefficient for trapping males ofTrichoplusia ni(Hübner), the cabbage looper moth, when compared with double-cone traps that captured moths alive. Sticky traps may be especially inefficient at high population densities, when the available surface becomes clogged with scales and moths. It is also very time consuming to remove captured moths to prepare sticky traps for reuse.

ISSN:1754-5692    

DOI:10.1093/ee/1.5.675

出版商:Oxford University Press    

年代:1972

数据来源: OUP

摘要:

While use of organic insecticides has without question resulted in increased agricultural production, it is becoming more apparent with time that some commonly used chemicals may have subtle side effects that are not particularly desirable.

ISSN:1754-5692    

DOI:10.1093/ee/1.5.677

出版商:Oxford University Press    

年代:1972

数据来源: OUP