Full Length Research Paper

Eradication of Lantana camara L. by inhibition of pollen germination using weedicides



Lantana camara L. belonging to family Verbenaceae is a major weed in many regions where it invades natural and agricultural ecosystems and special interests due to allergenicity. It is a noxious weed worldwide distribution and tops the tenth most dangerous weeds in the world. All the parts of the plant contain toxic substance such as lantadene, a polycyclic triterpenoid identical in structure with rehmannic acid. Phylloerythrin has photosensitizing properties. Thus, the plant has aroused human disliking and attempts are being made for its eradication or control, because it competes with more desirable plants. Survey through literature reveals that the considerable work is available on occurrence, biological and chemical control and allelopathic action of L. camara. In the present study effect of different weedicides namely Kay D (2, 4 D), Gold line (Oxyflourfen) and Glymac (Glyphosate) were studied on in vitro germination of pollen grains and pollen tube growth. Kay D, Gold line and Glymac showed stimulatory effect on germination of pollen grains and pollen tube growth. Observations showed that among all the weedicides Glymac was the most efficient to inhibit the pollen germination and tube growth followed by Gold line and Kay D. All the weedicides showed stimulatory effect on pollen germination and tube growth at lower concentrations and they gradually inhibit pollen germination at higher concentrations. The lethal doses for Kay D, Gold line and Glymac were 200 ppm, 80 ppm and 40 ppm respectively. it can be concluded that L. camara pollen and other parts of the plant are highly allergic and causes health hazards to human as well as to animals. Thus controlling and eradication of this weed by spraying the weedicides directly on the inflorescence and flower may provide an effective way.

Key words: Kay D, Glymac, Gold line.

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