Other offspring found in parts of Indiana include 17-year-old pups XII, XIII, XIV and 13-year-old pups XIX and XXIII. There are about 12 species of cicadas annually in Indiana, according to Barnes, and they usually emerge each year between mid-July and the end of July. 17-year-old cicadas, also known as Brood X, will crop up all over Indiana, but the largest populations will be in southern Indiana. Expect up to 1.5 million cicadas statewide during the next appearance.
Because of the new abundance of food, rat populations can “explode” after the appearance of a cicada and stay that way for years, Lill said. The best advice is to delay planting new trees until the cicadas are gone and cover young trees with insect nets while they're here, he added, noting that more mature trees can withstand the damage. Brood X cicadas will soon emerge from the ground in Indiana, a critical point for these periodic insects, and experts warn that some young trees may need protection to survive. Brood X members stand out for their bright red eyes and dark bodies, and are slightly thinner and smaller than annual cicadas.
There are two types of cicadas, the Brood X and the Annual. They are both known to cause damage to trees by slitting or puncturing the twigs on which the eggs are laid. In addition, egg laying may result in the dieback of oak trees.
Egg laying causes dieback on oak trees
There are many different diseases that affect oak trees. Many of them are minor and do not pose a threat to the tree, while others are more serious and may require some form of treatment. A few examples are:
California oak wilt, Armillaria Root Rot and hypoxalon canker. The latter is a fungal disease that attacks stressed oak trees. It causes dead lesions on the trunk and limbs and damages the structural integrity of the tree. Other symptoms include yellow or browning leaves, reduced twig growth, water sprouts on trunks and bark.
Another problem that can infect oaks are twig galls. These galls can kill an entire limb or tree. They often develop on the undersides of twigs. If they become severe, they can cause sooty mold to grow on the branches.
The Orangestriped Oakworm (Oliverella savannae) is an insect that lives in soil and feeds heavily on the leaves of oaks. When the caterpillar is young, it is red with yellow stripes. Eventually, the caterpillar morphs into a moth that burrows deep into the soil.
Female cicadas cause damage when they puncture or slit twigs to lay eggs
Female cicadas can damage young trees when they puncture or slit twigs to lay eggs. This can cause a limb to break or a tree to wilt. The wounds may also be used by other insects to enter or shelter from the cicada.
If you have recently planted a new tree or shrub, you can minimize the risk of injury from cicadas by avoiding planting when cicada eggs are expected to hatch. You can protect young trees with polyolefin fabric or insect netting. These materials can be installed at the nursery, and are inexpensive.
Cicadas can amass in dense numbers in parks and wooded areas. However, they are not harmful to humans or property. Some species can land on humans, so be cautious.
To keep cicadas from laying their eggs on your plants, you can use cheesecloth or insect netting. Use zip ties to secure the netting in place. For smaller shrubs, you can use twine to secure the netting.
Annual vs Brood X cicadas
If you are in Indiana, you may have heard of Brood X. This is a group of periodical cicadas. They can be very loud and have a long lifespan. The life cycle of this group of cicadas is about 17 years. In the next few months, these cicadas will start to emerge.
There are several reasons why a cicada emerges. One is to feed on the roots of trees. Another is to lay eggs. Cicadas have been known to seriously damage young trees. For example, when they emerge, they chew through the branch tips, causing the tree to die.
Periodical cicadas are found only in the eastern United States. These insects spend most of their lives underground. When they do emerge, they make a noise that is comparable to a low-flying plane. After emerging, they burrow into the soil.
When a cicada emerges, it can be a nuisance to urban areas. Heavy infestations can damage sidewalks. However, the insects do not carry any disease.
Protecting trees from cicadas
Cicadas can cause a lot of damage to young trees. However, they are not harmful to humans, as long as they are not stung. They feed on sap from the roots of the tree. Their eggs can also damage new trees.
The best way to protect your trees from cicadas is to put netting around the base of the tree. You can buy cicada mating netting at most garden centers. This type of netting is sized specifically for cicadas and can be fastened using zip ties or garden netting clips. It should be transparent, with small holes, so that cicadas do not escape.
There are several pesticides that can be used to prevent cicada infestations. However, these products are toxic to other plants, and may be dangerous to animals who eat cicadas. Therefore, chemical control is not as effective as netting.
A large, healthy tree will be able to withstand an attack from cicadas. Young trees with slender branches are especially susceptible to damage from cicadas. If you are planting new trees, you can install cicada netting before you plant them.
They bite and paralyze the cicada and bring it back to its overgrown nest, where the female wasp lays an egg in the cicada. According to the National Pest Control Association (NPMA), cicadas are expected to emerge from the ground in 15 states this spring, including Kentucky and Indiana. Most annual species of cicadas are greener and browner with dark eyes, and have a larger, stockier complexion. The female cicada then lays eggs on the thin and thin ends of tree branches, placing them in a thin furrow that makes a tool in her abdomen.
So when you see cicadas this year, enjoy them and celebrate their unusual life cycle, since we won't see them again until the spring of 2038. And for the next 17 years, try to avoid cutting down mature, living trees, because they're likely to support this year's growing cicadas. The life cycles of insects are similar to those of periodic cicadas, although much shorter, and should disappear by mid-September at the latest, Barnes said. A biologist from Kentucky Fish and Wildlife, Zak Danks, tells WLKY: “Periodic cicadas will be quite stained in Kentucky.” The last of the Brood X cicadas died out earlier this summer, most of them in June and early July, after spending about six weeks buzzing around looking for a partner. Biologists at the Indiana Department of Natural Resources expect the state to have two cicadas booms from May to August, with a peak volume in July.