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The coating of plants with honeydew can contribute to the spread of fungi which can damage plants. [118] [119] Honeydew produced by aphids has been observed to reduce the effectiveness of fungicides as well. [120] A hypothesis that insect feeding may improve plant fitness was floated in the mid-1970s by Owen and Wiegert.
[32] [33] As of 1947, the planet had 15 to 16 million km 2 (5.8 to 6.2 million sq mi) of mature tropical forests, [34] but by 2015, it was estimated that about half of these had been destroyed. [35] [21] [36] Total land coverage by tropical rainforests decreased from 14% to 6%. Much of this loss happened between 1960 and 1990, when 20% of all ...
Jungle burned for agriculture in southern Mexico. Tropical rainforests have received most of the attention concerning the destruction of habitat. From the approximately 16 million square kilometers of tropical rainforest habitat that originally existed worldwide, less than 9 million square kilometers remain today. [7]
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They were discovered in the 1940s after a long study of the plant growth regulator auxin. Synthetic auxins mimic this plant hormone in some way. They have several points of action on the cell membrane, and are effective in the control of dicot plants. 2,4-D, 2,4,5-T, and Aminopyralid are examples of synthetic auxin herbicides.
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Resistance refers to the ability of a plant to reduce the amount of damage it receives from herbivores. [52] This can occur via avoidance in space or time, [54] physical defenses, or chemical defenses. Defenses can either be constitutive, always present in the plant, or induced, produced or translocated by the plant following damage or stress. [55]
The policymakers now expect overall inflation, as measured by their preferred gauge, to rise slightly from 2.3% now to 2.5% by the end of 2025. That is far below its peak of 7.2% in June 2022.