Closing the Snack Bar: Developing Methods for Jackfruit Tree (Artocarpus heterophyllus Lamk.) Control in Brazil

Ciro José Ribeiro De Moura,Ana Carolina Lacerda,Átilla Ferreguetti,Marcela Gaspar,Helena Godoy Bergallo

doi:10.1590/2179-8087.008219

Abstract

ABSTRACT There are several techniques for the control and removal of invasive species that can be applied, and there is a demand among restoration practitioners for plant control methods. This study compared two methods for the control of jackfruit tree: mechanical method of trunk girdling and chemical method of herbicide injection into the trunk. It was evaluated both methods in terms of effectiveness in 10 plots (80 × 80 m). For the chemical method, triclopyr in concentrations of 2%, 6% and 8% was used. The progress of treatments was evaluated accordingly for the phytosanitary conditions. Method of trunk girdling proved to be ineffective and it had a low mortality rate (12%). The proportion of dead trees by chemical treatment was 100%. The results showed that chemical control of jackfruit trees was much faster and more effective.

Highlights

Prevention is still the best way to avoid problems arising from biological invasions (Pimentel, 2002; Richardson & Thuiller, 2007; ISSAC, 2018)
The results showed that chemical control of jackfruit trees was much faster and more effective
There are several techniques for the control and removal of invasive species that can be applied on a case-by-case basis, and there is a demand among restoration practitioners for a decision support tool to choose the best plant control methods (Sher et al, 2018)

Summary

Introduction

Prevention is still the best way to avoid problems arising from biological invasions (Pimentel, 2002; Richardson & Thuiller, 2007; ISSAC, 2018). It is necessary to determine the best method according to the circumstances, i.e. the target species, degree of infestation, habitat and available labor (Rejmánek & Pitcairn, 2002). In this sense, the efficiency of control depends on having thorough good knowledge of the biology on target species, resource availability for the establishment of programs and monitoring of the process of restoration area. For the control of invasive arboreal species, girdling is a popular technique to control invasive tree species in adulthood (Weber, 2017). The use of herbicide can be an opportunity to improve the control of invasive species, especially when combined with other control techniques, such as seedling withdrawing, felling or girdling (Itou et al, 2014)

Objectives

Methods

Results

Conclusion