Coccinia Grandis - Weed Control

Weed Control

There are both physical and chemical recommendations for control of the ivy gourd. It is very difficult to control this plant physically except by bagging fruits. Hand-harvesting normally does not kill the plant but rather breaks the vine blankets into smaller pieces and the plant is able to reestablish when it touches the ground. These methods can make the infestation worse and further the need for more rigorous control methods. Picking the fruit and placing them in plastic bags can help decrease the seed back that is present with the soil. When utilizing chemical controls, that ivy gourd responded well to a thin-lined bark application of 100% Garlon 4 (triclopyr), leaving plants in place so as not to translocate the herbicide or spread the pest. It is applied multiple times until the vine dies. In Hawaii several species of insect have been introduced with the purpose of being a biocontrol. Two weevils, Acythopeus burkhartorum and A. cocciniae, were introduced by the Department of Agriculture to Oahu and Hawaii. African vine moths (Melittia oedipus) were also released onto Oahu and Maui. On the island of Maui it appears that the A. cocciniae is established and are damaging leaves. The larva feed on the plant and the adults chew holes in the leaves. The moth has yet to appear successful in its purpose.

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