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Caterpillars Identification and Control on Cannabis Professor DeBacco Caterpillars Description Few Different Types of Caterpillars of concern for Hemp… Painted Lady Saltmarsh Caterpillar Yellow Woollybear Zebra Caterpillar Variegated Cutworm Painted Lady Identification Typically 2-5 leaves may be webbed together and ragged chewing injuries will be evident. The caterpillars within the webbed leaf shelter are notably spiny and early stage larvae are pale brown. As they age they become variably marked with black and yellow, with considerable range in the overall coloration. Saltmarsh Caterpillar Identification Damage to hemp by saltmarsh caterpillar is likely to be minimal. Peak feeding occurs late in the season and is limited to foliage. Yellow Wollybear Identification Damage to hemp by yellow woollybear is likely to be minimal. Peak feeding occurs late in the season and is limited to foliage. Zebra Caterpillar Identification In hemp damage is limited to a small amount of foliage, scattered through the planting. Damage to hemp by zebra caterpillar can be expected to be minimal and insignificant to crop yield. Variegated Cutworm It appears to primarily feed on hemp leaves However, it is known to tunnel into developing flowers and fruit of other crops so be sure to inspect developing hemp buds. Managing Caterpillars Caterpillars are most effectively controlled when they are small. Most pesticides will have little to no effect on bigger caterpillars. Most are based on Bacillus Thuringiensis as an active ingredient. Chemical control should be used as a last resort, as proper fertility, irrigation, and sanitation should all be prioritized over pesticides. Link to Lecture Slides: https://drive.google.com/file/d/1yeHt... *Due to the description character limit the full work cited for "Caterpillars Identification and Control on Cannabis" can be viewed at... https://drive.google.com/file/d/1vnJf...