Efficacy of Herbicides for Weed Control in Soybean (Glycine Max) Under a No- Tillage Cultivation System in Zambia

Njau, Silvest Samali (1993) Efficacy of Herbicides for Weed Control in Soybean (Glycine Max) Under a No- Tillage Cultivation System in Zambia. Masters thesis, University of Zambia.

[img] PDF (Efficacy of Herbicides for Weed Control in Soybean (Glycine Max) Under a No- Tillage Cultivation System in Zambia)
SILVEST SAMALI NJAU.PDF - Accepted Version
Restricted to Repository staff only

Download (1MB) | Request a copy

Abstract

A study was conducted at Lilayi farm in a no-tillage crop production system. The objective of the study was to assess the efficacy of new herbicides in a no-tillage soybean cultivation system in Zambia. Eleven treatments were used in this study. These include four preemergence, five post emergence and combinations of these herbicides. They were compared with hand hoe weeding (14 and 28 days after planting) and no weeding. The seedbed was prepared by two applications of 0.6 kg a.ijha paraquat before planting and this effectively controlled the first and second flush of weeds respectively. However, Euphorbia heterophylla recovered from the application of paraquat whereby the new shoots emerged from the lower nodes. All preemergence herbicides gave a season-long control of Nicandra physalodes. The infestation of other weeds was very low that their presence was considered to be negligible. The ability of Euphorbia heterophylla to recover from the application of paraquat made postemergence herbicides unable to control this weed effectively. Weed cover relative to crop cover was low throughout the season. Whereas the no weeding treatment had significantly the highest weed biomass, other treatments did not differ significantly from each other in weed biomass. Preemergence application of oxadiazon resulted in highest soybean seed yield and the no weeding treatment gave the lowest seed yield.

Item Type: Thesis (Masters)
Subjects: S Agriculture > S Agriculture (General)
S Agriculture > SB Plant culture
Divisions: Africana
Depositing User: Geoffrey Obatsa
Date Deposited: 31 Jan 2019 11:50
Last Modified: 31 Jan 2019 11:50
URI: http://thesisbank.jhia.ac.ke/id/eprint/8934

Actions (login required)

View Item View Item