In the earth’s mantle , large amounts of heat are transferred by convection currents, which would cause the heat from the core and the mantle itself causes convection currents in the mantle . The hot rocks eventually will cool and sink back through the mantle which will make the cycle repeat which would be the cycle of rising and sinking .

8 0

3 years ago

To kill the white pine blister, the forestry department decided to apply pesticide to the trees. They must directly apply the se

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The Forestry Department is using a chemical control method. This involves using a foliar spray method, in which department personnel will spray pesticide directly on the trees’ leaves.

Explanation:

The chemical control method of pesticide control involves spraying chemical pesticides directly on leaves, shoots or roots of the plants. These chemicals are toxic to the pests only and the pests get retracted from the plants because of the pesticides applied.

A selective pesticide application is done to limit application to a target harmful pest which kills only that and does not harm the other useful or harmless species which thrives on the plants.

White pine blister causes rust of the branches and leaves of the pine trees. Hence, a foliar spray of the pesticide is done to control its spread.

8 0

3 years ago

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