Latest Pests of Agastache rugosa and Their Control Methods

Aphids

The adults and nymphs of aphids mainly cluster on tender shoots and young leaves, causing damage, affecting plant growth, and seriously affecting the sprouting of new buds and new leaves.

Control method: spray 50% pirimicarb wettable powder at 2000 times dilution, or spray 40% dimethoate emulsifiable concentrate at 1500 times dilution for control. Note to stop application about 15 days before harvest to avoid toxin residues.

Red spider mites

The peak damage period is during the high-temperature period from June to August. Red spider mites suck sap on the underside of leaves, robbing the plant of nutrients. The specific symptoms are that small yellow-white spots first appear on the damaged parts, then gradually expand into yellow-brown scorched spots, and finally the whole leaf turns yellow and falls off.

Control method: spray 1500 times dilution of Chongman Like, or choose 1.8% abamectin at 3000 times dilution for control.

Argyrogramma leaf moth

The larvae of the Argyrogramma leaf moth cause damage by biting and eating leaves, producing holes or notches on the leaf surface. The habit of this larva is usually to hide on the back of the leaf during the day, and feed on the leaf surface at night or on cloudy days.

Control method: apply 25% chlordimeform water agent at 300-350 times dilution as a spray, or use 90% crystalline trichlorfon at 1000 times dilution for spraying and killing.

Leaf roller

The larvae of the leaf roller spin silk and roll leaves on young buds and young leaves, chewing and eating the leaves as damage.

Control method: spray trichlorfon at 300-400 times dilution on the leaf surface for control, which can achieve good results.

Cutworms and mole crickets

Cutworms and mole crickets bite off the roots and stems of Agastache rugosa seedlings, causing missing plants and affecting yield.

Control method: use 90% crystalline trichlorfon to make poisoned bait for trapping and killing, or apply 50% phoxim at 1000 times dilution mixed with poisoned soil and apply in strips.