Abstract
Three year field experiments were conducted to study the population density of wheat aphid and their beneficial fauna on different wheat varieties planted at different times at Adaptive Research Farm Sheikhupura, Pakistan in rice wheat cropping system. The experiment was laid out in split plot design in which varieties were replicated thrice in each planting date. Data for aphid population their predators, meteorological data, yield parameters and grain yield under different planting dates were recorded. Three years results revealed that in this ecological zone for wheat crop the planting dates 10th to 30th November performed better with respect to less attack of aphids, proper days required for maturity, number of grains per spike, number of tillers per m-2, thousand grains weight and grains yield. Late sown planting date causes reduction in yield due to reduce values of yield attributes and attack of aphid at growth stages while early sown date causes reduction in yield due to loss of grains weight by aphid feeding as the climatic conditions favors the development of aphids. Key words: Aphids; Planting dates; Varieties; Wheat; Yield http://dx.doi.org/10.19045/bspab.2020.90189
Highlights
Introduction balance use ofNPK fertilizers are theWheat (Triticum aestivum L.) being a most common practices for control of aphids.important crop, grown on the principal areaChoice of suitable planting date is dynamic to in Pakistan and has an important role in get high production due to dissimilarity financial strength of the country [1]
Data regarding density of mean aphid population per tiller of three consecutive crop seasons (2016-17, 2017-18 & 2018-19) on five wheat varieties planted at five different times were presented in (Tables 1-5) which depict population dynamics of aphids in eight sampling counts in each planting date
It reveals that the aphids arrived in the 1st week of February (04/2) with mean population of three years 1.33, 1.13, 0.59, 0.19 & 0.28 aphids per tiller on the varieties Galaxy-2013, Faisalabad-2008, Ujala-2016, AARI-2011 and Punjab-2011 sown on planting dates 01 November,11th November, 21st November, 1st December and 11th December respectively (Table 6)
Summary
Population density of wheat aphid and its natural predators on different wheat varieties planting at different times under ecological zone Sheikhupura, Punjab, Pakistan. Muhammad Shahbaz1*, Amna Palwasha, Muhammad Riaz, Faqir Ahmad, Zulfiqar Ali, Usman Shakir, Ghulam Nabi, Aftab Hussain, Sher Muhammad, Aftab Ahmad Khan , Irfan Manzoor , Saira Riaz and Muhammad Anjum Ali
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