摘要:

An experiment was designed to test the efficacy of various insecticides for the control of mustard aphid (Lipaphis erysimi(Kalt)) on mustard (Brassica juncea), variety RL 18 at the Research Farm of the Haryana Agricultural University, Hissar (India). Out of the 13 insecticides tried, each at two levels, it was found that methyldemeton 250 ml and menazon 250 g a.i. gave the maximum control of mustard aphid. Maximum yield of 1111 kg/ha was obtained with methyldemeton 250 ml (a.i./ha) against 360 kg/ha of the control.

ISSN:0030-7793    

DOI:10.1080/09670877109413350

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

As a sequel to the work carried out in 1968, and the appendix to the Fourth Quarterly Report of the International Capsid Research Team of that year, further information was required on the performance and efficiency of the mistblowers in current use. With this as the primary objective, a programme was arranged to compare a number of mistblowers, for performance and efficiency and more important, the ability to place a toxic quantity of insecticide in all parts of the cocoa tree to control capsid infestation. There are several spray programmes being carried out at the Institute and the equipment in use is similar to that used by farmers for capsid control.

ISSN:0030-7793    

DOI:10.1080/09670877109413351

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

The annual reports of the Herbicide Research Unit of the University of the West Indies were a regular feature of past issues ofPANS. Although the Herbicide Research Unit is no longer in being, investigations on weed control problems are still in progress, as part of the programme of the newly-formed Agronomy Research Unit. This article briefly reports some of the weed control work carried out by this unit in Jamaica during 1970.

ISSN:0030-7793    

DOI:10.1080/09670877109413352

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-7793    

DOI:10.1080/09670877109413353

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

At Shandaweel Experimental Station, Upper Egypt, chlorthal, nitrofen, fluorodifen and SMA were tried out either pre-em. or pre- and post-em. in onion nurseries. Data are presented with statistical analyses.

ISSN:0030-7793    

DOI:10.1080/09670877109413354

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Investigation on seed production potentialities of weeds of Dharwar was carried out at the Agricultural College Farm, during January 1969. Both the parasitic weedsStriga and Orobancheshowed high seed production,Strigaproducing as many as 380,000 seeds per plant followed byOrobanchewith 230,000 seeds per plant. Among the weeds studied,Desmodium diffusumproduced the least (425) seeds per plant.

ISSN:0030-7793    

DOI:10.1080/09670877109413355

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Papers presented to a Study Group at the 1970 Meeting of the British Association for the Advancement of Science held in Durham

ISSN:0030-7793    

DOI:10.1080/09670877109413356

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-7793    

DOI:10.1080/09670877109413357

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-7793    

DOI:10.1080/09670877109413358

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-7793    

DOI:10.1080/09670877109413359

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor