Recent trends of mustard aphid (Lipaphis erysimi) infestation in rapeseed mustard in eastern Rajasthan
37 / 6
Authors
-
Ram Kishore Meena
Agricultural Research Station (SKNAU Jobner), Navgaon, Alwar (Rajasthan)- 301025, India
Author
-
Ravindra Kumar Meena
Sardarkrushinagar Dantiwada Agricultural University, Dantiwada, Gujarat, India
Author
-
Hemraj Gurjar
Agricultural Research Station (SKNAU Jobner), Navgaon, Alwar (Rajasthan)- 301025, India
Author
-
Sarwan Kumar
Panjab Agriculture University, Ludhiana, India
Author
Keywords:
Infestation, mustard aphid, rapeseed-mustard cropsAbstract
Field experiments were conducted during 2014-15 and 2015-16 to study the seasonal incidence of mustard aphid (Lipaphis
erysimi Kalt.) on different varieties of rapeseed-mustard crops (Brassica sp.). The maximum peak population of mustard
aphid were recorded on BSH-1 followed by GSC 6, Rohini and T 27 under timely sown conditions as well as under late
sown conditions. In general the trend was observed as BSH-1 > GSC 6 > Rohini > T 27 for peak population of mustard
aphid during different seasons. The study revealed that Late (4th standard week) appearance of mustard aphid leads to
low population build up and early appearance (1st standard week) leads to high population build. Alate mustard aphid
was observed from 43rd standard week to 12th standard week with peak (145.7 aphids/trap) in 9th standard week and
disappeared during 12th standard week during (2014-15). Similarly observations were recorded during 2015-16 week with
peak (3447.4 aphids/trap). The results indicated that escape mechanism from mustard can be achieved if the crop would
have sown 3 weeks earlier.
Downloads
