Kill Lawn Armyworm And African Black Beetle | Maintaining Lawns And Gardens

Kill Lawn Armyworm And African Black Beetle | Maintaining Lawns And Gardens

Two of the worst lawn pests Lawn Armyworm

Lawn Armyworm (Spodoptera maurita) are a major pest during Summer and Autumn, causing severe damage to turfgrass surfaces where they attack leaves, stems and seedheads. Infestations in turf gradually extend outwards from gardens or higher cut turf areas as these plants are used as egg laying sites.

Severe damage is predominantly caused by the later instar stages and as populations increase, the larger armyworms tend to move in groups into unaffected turfgrass areas, hence the name ‘Armyworm’. Armyworms characteristically have stripes or triangular patterns along their smooth body, differing from that of the sod webworms.

Armyworms are the larvae of moths of the family Noctuidae. The female moth may lay more than 1000 eggs, sporadically in clusters within 4 to 10 days, pending on temperature. The newly hatched armyworms stay together feeding on the same plant until it is devoured. The larvae are usually most active in the evening or at night, except in overcast weather conditions. During the day they hide under the safety of the lower grass leaves.

An Armyworm will undergo 6 to 9 instar stages before it is fully developed. This will take 21- 35 days and at a mature instar stage the insect will reach 3-4 cm in length. When fully fed the Armyworm will work its way into the soil profile where it pupates. 10-14 days later the moths emerge. There may be 2 or 3 generations of Armyworm during the Summer and Autumn period.

There are several options for lawn Armyworm control. Chlorpyrifos 500, Bistar, and Lepidex are useful options in controlling these pests. For most effective control, application should be made late in the afternoon.

African Black beetle

African Black Beetle (Heteronychus arator) is a scarab species causing most damage to read more…

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