Studies on Hybridization and Genetic Diversity in Cucumber (Cucumis sativus L.)

A Shrestha*, B Thapa, R Subedi and LP Amgain

Department of Agronomy, Institute of Agriculture and Animal Science, Lamjung Campus, Nepal

*Corresponding Author: A Shrestha, Assistant Professor, Department of Agronomy, Institute of Agriculture and Animal Science, Lamjung Campus, Nepal.

Received: August 03, 2018; Published: August 10, 2018

Citation: A Shrestha., et al. ““Weed Abundance, Diversity, Dry Matter and Productivity of Spring Maize Under Differt Tillage and Weed Management Method in Mid-Hills of Nepal". Acta Scientific Agriculture 2.9 (2018).

Abstract

  Influence of weed control practices on growth and yield of winter maize (Zea mays L.) was studied in a field trial at the experimental station of Institute of Agriculture and Animal science, Lamjung Campus, Lamjung. The experiment was laid out in split plot design, with two tillage methods (no tillage and conventional tillage) as main plot factor and seven weed management practices as sub plot factor (sequential application of atrazine @ 0.75 kg a.i. ha^-1fb 2,4-D @ 1.5 kg ha^-1; pre-emergence tank mix application of atrazine @ 0.75 kg ha^-1 and glyphosate @ 2.5 ml lit^-1 of water; pre-emergence tank mix application of atrazine @ 0.75 kg ha^-1 and pendimethalin @ 2 mllit^-1 of water; cowpea co-culture; black polythene mulch, weed free and weedy check). Data regarding the weed population, weed dry weight, growth parameters of crops, yield and yield attributes were recorded during the study. Weed flora dominating throughout the research were grasses includes: Cynodon dactylon, Digitaria ciliaris, Bidens pilosa; sedges include Cyperus iria, Cyperus rotundus, Fimbristylis miliacea; broad leaves which includes Ageratum conyzoides, Chenopodium album, Brassica tournefortii, Amaranthus spinosus. Significantly more weed density and dry weight were recorded in conventional tillage as compared to no tillage during most of the observations that resulted higher grain yield in no tillage (5584 kg ha^-1) as compared to conventional tillage (3981 kg ha^-1). The correlation between grain yield and weed dry weight was found to be negative. All the weed control practices decreased weed density. Black polythene mulch treatment found to be superior in all parameters of maize and lowering the weeds influences on crop, which is even superior to the weed free check. The highest grain yield (7071.06 kg ha^-1) obtained from black polythene mulch which was statistically similar to weed free check (5916.29 kg ha^-1). The other weed management practices produced intermediate yield between black polythene mulch and weedy check which produced the lowest grain yield (3168 kg ha^-1). Among herbicidal application sequential application of atrazine and 2,4-D seemed better than other as it reduced comparatively more weed dry weight. Similarly, cow-pea co-culture also reduced weed dry weight almost similar to herbicidal treatment especially at later stage.

Keywords: Weed; Spring Maize; Tillage; Weed Management

Copyright: © 2018 A Shrestha., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.