Abstract
The investigations entitled “Incidence and relative efficacy of different insecticides against Chaetoprocta ( Chaetoprocta odata Hewitson) infesting walnut in Kashmir valley” were undertaken in three major walnut growing areas i.e., Salar (Anantnag), Wussan (Ganderbal) and Kulangam (Kupwara) districts of Kashmir Valley for two cropping seasons 2011 and 2012. Incidence of Chaetoprocta ( Chaetoprocta odata Hewitson) revealed that the pest appeared in second fortnight of March on the terminal twigs and attained its peak population of 65.80 (2010) and 68.80 (2011) in the 1 st week of May at Salar (Anantnag). Pooled relative efficacy of different insecticides in field trials at three locations during 2010 and 2011 revealed that high mean per cent mortality was registered by imidacloprid 200 SL at 0.03 per cent at all the three locations with pooled mean per cent mortality of (91.78) followed by dimethoate 30 EC at 0.05 per cent (88.71).
Highlights
Walnut (Juglans regia Linnaeus) belongs to family Juglandaceae and genus Juglans is believed to have origin in Iran
The present studies carried out during 2010-2011 revealed that C. odata started its activity in the second fortnight of March at Salar (Anantnag)
The present investigation is in agreement with Massodi and Trali (1987) who reported that the slug like larvae of C. odata are greenish in colour and flattened in shape
Summary
Walnut (Juglans regia Linnaeus) belongs to family Juglandaceae and genus Juglans is believed to have origin in Iran. In India, walnut production was earlier confined to Jammu & Kashmir but it is cultivated in Himachal Pradesh, Uttarakhand hills. Besides India, major walnut growing countries are China, USA, Iran, Ukraine, Turkey and Mexico. China stands first followed by USA, Turkey and Iran while India stands seventh in production list. Walnut is an important crop grown in Jammu and Kashmir and contributes around 98 per cent of the country’s production. India exported 9073.38 metric tonnes of walnut valued at Rs 1978.15 million during the period 2009-10 as against 5696.33 metric tonnes valued at Rs 1412.36 million in 2008-09 and is projected to reach around 75,000 tonnes by 2020 (Vigneshwara, 2012)
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