Hundreds of Mark's columns from his 12 years writing for the Beacon-Villager are accessible at maynardlifeoutdoors.com. The website includes an article directory by category (History, Nature, etc.).
SUMMARY: There is an interesting confluence of an invasive plant and insect species that may change our biosphere going forward. The Asian-origin tree species Tree of Heaven became a widespread invasive in the United States in the mid-1800s. An insect, the spotted lanternfly - first observd in the US in 2014 - prefers Tree of Heaven (TOH) as a host species, but also afflicts grape vines and fruit trees. It has been observed in Maynard as of 2026. As a means of dealing with both trees and insects, species-specific fungi and parasitic insects are being actively researched by the US Department of Agriculture (USDA).
![]() |
| Adult Spotted Lanternfly on trunk of a Tree of Heaven tree |
As with many later-deemed invasive plant species, the initial introductions were deliberate. By the 1840s these trees were being sold commercially in the eastern United States, popular for city plantings because it thrives in poor soil and is resistant to drought and pollution. In California, immigrant Chinese workers at mines and railroads brought Tree of Heaven with them for its traditional medicinal purposes - the bark used to make an astringent tea.
Trees are either male or female. Both have flowers, but only the female trees create seed clusters. A mature tree can produce more than half a million seeds in a single season! These disperse by wind, and are rarely eaten by birds, mammals or insects. Deer will not eat the leaves nor nibble on the bark of saplings.
This species does not play well with others. As with garlic mustard, this plant produces chemicals which inhibit the growth of other plants, a trait that is referred to as being allelopathic. Combine that with prolific seed production, a growth rate much faster than any native tree, plus resistance to pollution and drought, and this tree is a major nuisance in urban and semi-urban environments unless vigorous combated.
Tree of Heaven smells bad. One disparaging nickname is 'stink tree.' Anyone who has tried to pull up seedlings or cut sprouts knows this tree has an offensive odor - sometimes described as having overtones of rancid peanut butter and/or cat urine. This test provides a mean to differentiate TOH from similarly leafed sumac, black walnut and other plants.
Tree of Heaven is difficult to kill. Cutting results in new growth from the stumps plus a massive production of shoots from the surviving roots as far away as fifty feet from the original trunk. Systemic herbicides that kill roots (for example, triclopyr and glyphosate) currently provide the best chemical control. These can be sprayed on shoots, or holes can be drilled in the stumps of freshly cut trees and high concentration herbicide products applied directly. However, both application methods can cause collateral damage to nearby plants. The USDA is actively researching a fungus and several insect species as being specific to TOH, i.e., not causingt collateral damage to native plant species.
![]() |
| Spotted Lanternfly showing forewing and underwing |
Given the very recent appearance in Maynard, it is unlikely that there will be large numbers of adults present this fall. However, if the infestation becomes bad in future years, large numbers can be expected to gather on TOH tree trunks, fruit trees and others. Insecticide sprays can be useful at these times.
Several other means of controlling spotted lanternfly are being explored. A fungal pathogen that kills Tree of Heaven is being tested. Four species of fungi that kill spotted lanternfly are being evaluated as being species-specific, i.e., not killing native insects. These would require annual spraying of target food plants. In addition, three species of wasps native to China that are known to lay their eggs on spotted lanternfly egg masses. Again, care must be taken to confirm that bio-antagonists are specific to the target species. An example of succesful bio-control is the introduction of a parasitic wasp and a fly species to eastern Massachusetts about ten years ago that ended the infestation of winter moths.
MORE ON MANAGEMENT
Plantings of Common Milkweed and Swamp Milkweed, in addition to supporting Monarch Butterfly caterpillars, cause deaths of Spotted Lanterfly that feed on the plants, as the same toxins which the butterflies safely absorb and make them distasteful to predating birds are poisonous to the lanternflies.
Areas in infested states that have had population explosions sometimes have much lower insect counts in subsequent years. This can be due to a boom/bust population cycles* frequently seen in insect populations, but there is also evidence that native insect eating species now recognize spotted lanternfly nymphs and adults as edible. Predating birds include cardinals, bluejays, catbirds and titmice. Predating insects include yellowjackets and praying mantis. When Spotted Lanternflies feed on Tree of Heaven as nymphs and adults they are more successful to complete their life cycle, possibly due to bitter-tasting chemicals they absorb from the trees; all the more reason to kill Tree of Heaven.
*Boom/bust ecology is extremely complex. Often, the introduction of an invasive species results in an initial massive boom - sometimes multi-year - followed by a decline as species-specific diseases and parasites increase, and also native responses increase. However, some native and some established invasive species have repeated boom/bust population events. For example Gypsy Moths have boom years every 10-15 years, in part caused by ideal weather.
















