Gardeners often plant iris in her flower beds and gardens by. A splash of color in the landscape Siberian irises are often found in blue, yellow, purple or white, and some hybrid species in black, bronze, pink or creamy white. Irises are generally resistant pests are susceptible to infestation of the iris borer can adversely affect the health and appearance of the plant.
The iris borer is the most damaging pest Iris says Iowa State University. Adult forms are moths emerge from the soil and lay their eggs on iris debris. After hatching, the larvae are plump, smooth caterpillars. Iris borer larvae typically measure 1-1/2 to 2 inches in length and are pink with a brown head capsule.
Iris borer larvae feeding is strongest in May or June when the larvae feed on the foliage of iris active. Water-soaked areas appear on leaves, which makes it have a ragged appearance. Dark stripes can also be seen on the leaves of the plant. The larvae moved down to feed on the rhizomes of the plant and generally substantial harm to the diet in the rhizomes in late July or early August.
Sanitation habits are the most important aspect of managing the iris borer. Remove and discard any damage rhizomes and all plant debris. Check the panel bed in spring and remove remove any remaining plant debris to put all your eggs before they hatch. Eggs hatch in April or May and iris borer only one generation per year. Insect attack nematodes for the control of the iris borer. After the purchase, add them nematodes in the soil for the further control of these harmful pests.
Spray your iris with insecticides in the spring, when Iris was drill. Problem in recent years Insecticidal sprays work best when they are applied iris when foliage is 5 to 6 inches in length. Sprays are only effective against the iris borer larvae when applied before. The caterpillar into the rhizome of the plant Insecticides with the active ingredients acephate or spinosad are the most effective against iris borer larvae.